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发表于 2006-8-21 17:35:17
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SECTION 1200: GENERAL REQUIREMENTS AND PROVISIONS
CONTENTS
1201 SCOPE
1202 SERVICES
1203 ROAD INTERSECTIONS AND JUNCTIONS
1204 PROGRAMME OF WORK
1205 WORKMANSHIP AND QUALITY CONTROL
1206 SETTING OUT OF WORK AND PROTECTION OF BEACONS
1207 NOTICES, SIGNS AND ADVERTISEMENTS
1208 MEASUREMENT
1209 PAYMENT
1210 SUBSTANTIAL COMPLETION OF THE WORKS
1211 HAUL OVER COMPLETED ROAD
1212 NOT USED
1213 NOT USED
1214 EXTENSION OF TIME ARISING FROM ABNORMAL RAINFALL
1215 NOT USED
1216 INFORMATION FURNISHED BY THE EMPLOYER
1217 NOT USED
1218 PROTECTION OF THE WORKS AND REQUIREMENTS TO BE MET BEFORE CONSTRUCTION OF NEW WORK ON TOP OF COMPLETED WORK IS COMMENCED
1219 REMEDIAL WORK
1220 WATER
1221 ELECTRICITY SUPPLY
1222 PAYMENTS AND TOLERANCES
1223 DRAWINGS
1224 NOT USED
1225 PHOTOGRAPHIC RECORDS
1226 (NOT USED)
1227 ACCESS TO SITE
1228 CO-OPERATION AT SITE
1229 ROADS AND SITE TO BE KEPT CLEAN
1230 SECURITY OF THE WORKS
1231 SUPPRESSION OF NOISE
1232 SAFETY
1233 METHOD OF WORKING
1234 TEMPORARY WORKS
SECTION 1200: GENERAL REQUIREMENTS AND PROVISIONS
1201 SCOPE
This section covers matters which relate to the construction work as a whole. Definitions, phrases or wording which would otherwise require repetition in other sections of the Specifications are also covered by clauses in this section. Matters covered by the General Conditions of Contract are not repeated in this section, except where necessary in order to provide more detailed information.
1202 SERVICES
This Contract may include certain work involved in moving and reinstating existing services that may be affected by the construction of the Works.
The Employer will provide in the Contract Documents information regarding the location of existing utility services, but the Employer does not accept responsibility for the accuracy of this information.
Where the position of a known service cannot be determined with sufficient accuracy by visual inspection, the Contractor shall open up and make further investigations before commencing construction, so that the position of such services can be determined with sufficient accuracy to avoid damage during construction. Where so instructed, the Contractor shall also open up and search for any services not shown on the plans but which he or the Engineer may believe to exist. Thereafter the Contractor shall assume responsibility for all known services whether shown on the Drawings or not.
The Contractor shall take all reasonable precautions to protect existing services during construction and during relocation of such services. Any pipe, cable, conduit or other known service of any nature whatsoever damaged as a result of the Contractor's operations, shall be repaired and reinstated forthwith by the Contractor or by the Authority concerned, all at the expense of the Contractor and to the satisfaction of the Engineer.
It shall be clearly understood that in certain instances existing services can only be relocated after the Contractor had advanced sufficiently on, or completed, certain sections of earthworks or certain structures.
Whenever services are encountered which interfere with the execution of the Works and which require to be moved and relocated, the Contractor shall advise the Engineer, who will determine the extent of the work, if any, to be undertaken by the Contractor in removing, relocating and reinstating or protecting such services.
Any work required to be undertaken by the Contractor in protecting or moving and relocating services shall be valued in accordance with Clause 58 of the General Conditions of the Contract and a Provisional Sums are included for this purpose in the Bills of Quantity (Bill No 6, Ancillary Works). Where the Contractor is required to make payment under the provisional sums to any statutory body (including Telecom Fiji, Fiji Electricity Authority and Public Works Department) for work done by them in relocating services, the Engineer shall certify only the actual amount paid for reimbursement to the Contractor. Any administrative expense or cost of liaising with each authority shall be deemed to be included in item 13.01(b).
The Contractor shall work in close co-operation with private owners or public authorities controlling services which have to be protected, removed or relocated. Details regarding the state of negotiations concluded between the Employer and the owner at the time of tendering in respect of the time at which either the owner is prepared to start moving such services or at which the Contractor is required to or will be allowed to start moving services and the duration of such operations, will either be stated in the Tender Documents or be made available to Tenderers.
When the Contractor details his programme of work he shall, in consultation with the Engineer, clearly indicate when he proposes to start and conclude the moving of each service or when he will require the owner to start and conclude the moving of each service. Should it thereafter, through delays on the part of the Employer or the owner of the service not be possible to carry out the relocation work within the planned time frame, such programme shall be suitably altered by the Contractor in consultation with the Engineer so as to limit, as far as possible, the extent of any damages or delays. Should it not be possible to limit entirely the damages or delays resulting from the alterations necessary to the programme of work, the Contractor shall be reimbursed for any additional costs or damages incurred by him.
The Contractor's attention is drawn to the need for Telecom Fiji and the Fiji Electricity Authority to carry out extensive relocation works on both the Lodoni and Kings roads. The Contractor shall liaise with Telecom Fiji and the Fiji Electricity Authority to allow them or their agents or contractors reasonable access to any part of the site. The position of the new lines will be adjacent to the contract road and work on the repositioning will be carried out during the contract period. In the case of Telecom lines, some sections may be placed in underground ducts.
1203 ROAD INTERSECTIONS AND JUNCTIONS
Except where otherwise specified, no additional payment over and above payment for the various items or work included under this Contract will be made for the construction, in confined surroundings of curves, tapers, bell-mouths, traffic islands, farm accesses and other appurtenant works connected with the construction and maintenance of road intersections and junctions.
The Contractor shall be required to provide for the safe and unrestricted flow of public traffic at all times during the construction and maintenance of such intersections and junctions.
1204 PROGRAMME OF WORK
The programme of work required in terms of the General Conditions of Contract shall be submitted to the Engineer not later than 28 days after the Contractor has been issued with the order to commence.
The Programme shall not be in the form of a bar chart only, but shall show clearly the anticipated quantities of work to be performed each month, the resources to be applied to each activity as well as the anticipated earnings for the various sections of work.
The programme shall also show the order in which the Contractor plans to accept responsibility for maintenance of sections of existing road both on and off the site.
If, during the progress of the work, the quantities of work performed per month fall below those shown in the programme, or if the sequence of operations is altered, or if the programme is deviated from in any other way, the Contractor shall, within one week after being notified by the Engineer, submit a revised programme.
If the programme is to be revised by reason of the Contractor falling behind his programme, he shall produce a revised programme showing the modifications to the original programme necessary to ensure completion of the works or any part thereof within the time for completion as defined in Clause 43 of the Conditions of Contract or any extended time granted pursuant to Clause 44 of the Conditions of Contract. Any proposal to increase the tempo of the work must be accompanied by positive steps to increase production by providing more labour and plant on Site, or by using the available labour and plant in a more efficient manner.
Failure on the part of the Contractor to work according to the programme or revised programme, shall be sufficient reason for the Employer to take steps as provided for in the Conditions of Contract and shall be construed, as not executing the Works in accordance with the Contract.
The approval by the Engineer of any programme shall have no contractual significance other than that the Engineer would be satisfied if the work is carried out according to such programme and that the Contractor undertakes to carry out the work in accordance with the programme, nor shall it limit the right of the Engineer to instruct the Contractor to vary the programme should circumstances make this necessary. The above shall not be taken to limit the right of the Contractor to claim for damages or extension of time to which he may be fairly entitled to in terms of the General Conditions of Contract for delay or disruption of his activities.
Should the Employer request and the Contractor undertake to finish the whole or part of the Works ahead of the time originally required by the Contract, payment for accelerating the work shall only be made if agreed to beforehand in writing and according to the terms of such agreement.
1205 WORKMANSHIP AND QUALITY CONTROL
The onus is on the Contractor to produce work which conforms in quality and accuracy of detail to the requirements of the Specifications and Drawings, and the Contractor must, at his own expense, institute a quality control system and provide experienced engineers, foremen, surveyors, materials technicians, other technicians and other technical staff, together with all transport, instruments and equipment, to ensure adequate supervision and positive control of the Works at all times.
The cost of all supervision and process control, including testing, so carried out by the Contractor, shall be deemed to be included in the rates tendered for the related items of work except that the cost of certain tests and the provision of certain items of testing and sampling equipment will be paid for separately as provided for in those sections of the Specifications where this applies.
Unless otherwise instructed by the Engineer, the Contractor shall obtain approval for each layer of the works, in embankments, sub-grade, any stabilised layers, subbase, base and surfacing and shall not proceed with subsequent layers until each approval is granted. The Contractor shall be required to give a minimum of 24 hours notice in writing to the Engineer to allow any inspection to be carried out. If any test is required to verify compliance with these specifications, then the Contractor shall plan his Works so as to allow the Engineer sufficient time to carry out such tests. Unless instructed otherwise, the Contractor may proceed with the Works even though the results of tests may not yet be available. However, the Contractor shall be required to re-execute work if tests indicate non compliance with these Specifications. Any approval given by the Engineer shall not relieve the Contractor of any of his obligations under the Contract.
1206 SETTING OUT OF WORK AND PROTECTION OF BEACONS
The Contractor's attention is drawn to the requirements of Clause 17, Parts I and II of the Conditions of Contract regarding setting out.
The original points, lines and levels of reference referred to in Clause 17 shall be those shown on the drawings.
The Contractor shall survey all reference and level beacons and satisfy himself that they have not been disturbed and are true in regard to position and level. If beacons have been destroyed, disturbed or damaged before the Site is handed over to the Contractor, the Engineer will arrange to have new beacons installed. A beacon which has been disturbed shall not be used unless its true position and level has been re-established and the new values have been verified by the Engineer.
Where a beacon is likely to be disturbed during construction operations, the Contractor shall establish suitable reference beacons at locations where they will not be disturbed during construction. Beacons shall be established on a steel pin set in concrete or no other less permanent manner approved by the Engineer. No beacon shall be covered over, disturbed or destroyed before accurate reference beacons have been established and details of the position and levels of such beacons have been submitted to the Engineer and approved by him. The Contractor's reference beacons shall be of at least the same quality and durability as the existing beacons.
The Contractor shall submit to the Engineer the method of setting out he proposes to employ. Methods employed shall be such as to facilitate checking of line and level by the Engineer's inspectors without the use of survey instruments. The Engineer may at any time request the Contractor to submit proof that his setting out has been satisfactorily checked.
If any trigonometrical beacons, bench marks or other land survey marks are disturbed or destroyed by the Contractor they shall be replaced, within three months, by a registered land surveyor at the Contractor's expense. In cases where displacement of or damage to such beacons is unavoidable the Contractor shall notify the Engineer in good time so that he may arrange to have such beacons suitably referenced and later on reinstated. The cost of such work, if paid for by the Contractor, shall be reimbursable as defined in Clause 51 of the General Conditions of Contract.
Accurate control of line and level shall be provided by the Contractor at all stages of construction. In respect of the road itself control shall be at 20 m intervals, or such closer intervals as may be directed on horizontal and vertical curves. Wherever necessary, but particularly on completion of the sub-grade and the base, the Contractor shall re-establish stake line pegs at sufficiently close intervals to determine accurately the edges of the base, surfacing and other road elements permanently exposed to the eye.
Setting out will not be measured and paid for directly and compensation for the work involved in setting out will be deemed to be covered by the prices tendered and paid for the various items of work included under this Contract.
1207 NOTICES, SIGNS AND ADVERTISEMENTS
The Contractor shall not erect any signs, notices or advertisements, on or along the Works or the Site of the Works without the written approval of the Engineer.
The Contractor shall provide and erect, as part of his obligations under Section 1300 and on approved sites, signboards of sound weatherproof construction, painted by an approved firm of signwriters. The format will be given by the Engineer. Four signboards will be required, two at Korovou and one each at the extremities of the Works.
These signs are to be erected not later than one month after the Contractor has been given access to the Site.
The signboards shall be painted with the legend in English.
No signboards other than those specified above will be permitted on or adjacent to the Works, except that the Contractor may permit each of his sub contractors to display one, and only one, signboard of less than 2 sq. m at the works office.
The Engineer shall have the right to have any sign, notice or advertisement moved to a better position or to have it removed from the Site of the Works if it should in any way prove unsatisfactory, inconvenient or dangerous to the general public.
All advertisements, notices and temporary signs shall be removed by the Contractor by the end of the Maintenance Period.
1208 MEASUREMENT
(a) Units of Measurement
All work shall be measured in accordance with the S.I. System of metric units.
(b) Bill of Quantities
The quantities set out in the Bill of Quantities are estimated quantities and are used for the comparison of Tenders and awarding the Contract. It must be clearly understood that only the actual quantities of work done or materials supplied will be measured for payment, and that the billed quantities may be increased or decreased as provided for by the General Conditions of Contract.
(c) Measurement of completed work
(i) All distances along the centre line of the roads or sewer line as shown on the Drawings are horizontal distances at sea level and these distances will be used in calculating the quantities of fill, sub-bases, bases, shoulders, surfacing and paving for payment purposes. All cross sections shall be taken in a vertical plane.
(ii) All materials which are specified to be measured in the vehicle shall be hauled in vehicles of such type and size that the actual contents may be readily and accurately determined. Unless all vehicles are of uniform capacity, each vehicle shall bear a plainly legible identification mark indicating its specific approved capacity.
(iii) Structures shall be measured to the neat lines shown on the drawings including any changes ordered in writing by the Engineer and shall include any reinforcing steel and minor ducts up to 150 mm in diameter.
1209 PAYMENT
(a) Contract Rates
In computing the final contract amount, payments shall be based on actual quantities only of authorised work done in accordance with the Specifications and Drawings. The tendered rates shall apply, subject to the provisions of the General Conditions of Contract, irrespective of whether the actual quantities are more or less than the billed quantities.
(b) Prices to be inclusive
The Contractor shall accept the payment provided in the Contract and represented by the prices tendered by him in the Bill of Quantities, as payment in full for executing and completing the work as specified, for procuring and furnishing all materials, labour, supervision, plant, tools and equipment, for wastage, transport, loading and offloading, handling, maintenance, temporary work, testing, quality control including process control, overheads, profit, risk and other obligations and for all other incidentals necessary for the completion of the work and maintenance during the Period of Maintenance.
This Clause shall be applicable in full to all pay items except as these requirements may be specifically amended in each case.
In particular the Contractor shall be deemed to have included time related and fixed costs as specified in Section 1300 under the appropriate items in the General and Preliminary section of the Bill of Quantities and not in rates for work items.
(c) Meanings of certain phrases in payment clauses
(i) "Procuring and furnishing....(pay item mentioned) Material"
Where any of the words "supply", "procure" or "furnish" (material) are used in the description of a pay item it shall mean the supply and delivery to the point of use of all materials of any kind required for the work covered by the particular pay items, including all tax, purchase costs, claims, damages, royalties and transport costs involved. In the case of borrow materials, stone and sand, it shall also include all negotiations with owners concerned, royalties, excavating, producing, preparing, processing, testing, hauling and delivering the material to the point of use; the construction, repair, maintenance and making good after completion of all access roads, and all work required in opening, using and finishing off borrow pits which is not covered by other pay items in the Bill of Quantities.
(ii) "Placing material"
The phrase "placing material" shall mean the offloading, spreading, blending, processing, watering, mixing, shaping and compacting (where specified) the material in the road prism, subbase, base, shoulders, banks and bypasses as well as procuring, furnishing, applying and admixing of water; breaking down oversize material, removing oversize material which cannot be broken down, correcting irregular or uneven surfaces or deficient thickness, finishing off to within the specified tolerances, refilling test holes and maintaining the completed work. In the case of asphalt courses and bituminous treatments it shall also mean the heating and spraying of binder, spreading of aggregate or asphalt mixtures, rolling, compacting, finishing off to within the specified tolerances and maintaining the completed work.
The phrase "procuring, furnishing and placing" shall mean "procuring and furnishing" in addition to "placing" all as defined hereinbefore.
(d) Pay items
The descriptions under the pay items in the various sections of the Specifications, indicating the work to be allowed for in the tendered prices for such pay items, are for the guidance of the Contractor and do not necessarily repeat all the details of work and materials required by and described in the Specifications.
These descriptions shall be read in conjunction with the relevant Specifications and Drawings and the Contractor shall, when tendering, allow for his prices to be inclusive as specified in Subclause (b) above.
(e) Materials on Site
No payment will be made in any Certificate for any materials on site until such time as they have been incorporated in the permanent works and approved.
(f) Provisional Sums
The Bill of Quantities may contain certain Provisional Sums so designated and entered as a preliminary allowance to cover the cost of work, materials, goods or services to be provided by the Contractor and which have not been fully specified or measured or to cover the cost of unforeseen items of work or contingent expenditure. Work done under a Provisional Sum shall only be executed upon a written order by the Engineer which order shall also specify the method of payment.
Payment as specified in the order given by the Engineer shall be either at the contract rates tendered or where the Contractor was not required to enter a rate in his tender then payment shall be in accordance with the provisions of Clause 58 of the General Conditions of Contract.
1210 SUBSTANTIAL COMPLETION OF THE WORKS
The Contractor shall note that the Engineer reserves the right not to certify the Works to be "substantially completed" as required by the General Conditions of the Contract, unless the following portions of the Works are completed according to the Specifications:
(a) the gravel wearing course, final bituminous surfacing and kerbing;
(b) all drains and drainage structures, for the construction of which timeous instructions were given by the Engineer;
(c) finishing of medians and slopes of cuts and fills to the road;
(d) bridgeworks;
Opening of sections of the road or individual bridges to public traffic shall not entitle the Contractor to receive a Handing Over Certificate unless the section is separately identified in the contract or qualifies otherwise in terms of Cl 48 of the General Conditions of Contract
1211 HAUL OVER COMPLETED ROAD
The operation of hauling equipment over portions of the road completed up to the top of any stabilised layer, subbase, base, surfacing shall be limited to equipment with an axle load not exceeding that allowed by the Engineer.
Notwithstanding any approval given by the Engineer to open any section of road to public traffic or the Contractor's own traffic, the Contractor shall be fully responsible for the rectification of damage to the sub-grade or underlying pavement that may be caused by such traffic.
1212 NOT USED
1213 NOT USED
1214 EXTENSION OF TIME ARISING FROM ABNORMAL RAINFALL
(a) The Contractor shall be granted extensions of the Contract Period in respect of rainfall deviating from average conditions defined hereunder. The Contractor is deemed to have examined all available information regarding the climate in the area of the site. The figures employed in the formula for calculating adjustments to the contract period given hereunder are average figures from a single rain gauge, the derivation of which are given in the information provided to tenderers.
The adjustment to the Contract Period shall be calculated separately for each calendar month or part thereof in the manner set out hereunder and shall be calculated for the whole period for completion of the Contract including any extension thereof granted pursuant to Clause 44 of the General Conditions of Contract and any extension calculated in accordance with this clause.
(b) (i) Adjustment of the Contract Period shall be calculated as follows :
V = (Nw - Nn) + (Rw - Rn)
30
The symbols have the following meanings
V = Adjustment of the Contract Period in calendar days in respect of the calendar month under consideration subject to limitations defined hereunder.
Nw = Actual number of days during the calendar month upon which a rainfall of 10mm or more has been recorded.
Nn = Average number of days upon which more than 10mm was recorded, as derived from rainfall records described in Subclause 1214 (c).
Rw = Actual rainfall in mm in respect of the calendar month under consideration.
Rn = Average rainfall in mm in respect of the calendar month under consideration as derived from records described in Subclause 1214 (c).
(ii) If the Engineer considers the Contractor to be entitled to an extension of the contract period pursuant to Clause 44 for reasons other than exceptional adverse climatic conditions, due account shall be taken in computing the extension of time due, of the seasonal climatic conditions under which the Works will be performed. As such, the extension of time computed pursuant to this Clause shall be considered a full and fair allowance for variations from the average weather conditions during the course of the Works.
(iii) The formula does not take account of flood damage (arising other than from failure on the part of the Contractor to provide adequate temporary protection of partly completed Works) which causes further of consequential delays. Such further delays shall be considered separately in accordance with Clause 44 of the General Conditions of Contract.
(iv) Average values for Nn and Rn have been extracted from historical records relating to Station V7885C P074 at Korovou
MONTH
STATION V7885C P074
Rn Nn
JANUARY 292 8.3
FEBRUARY 276 8.3
MARCH 347 10.4
APRIL 324 8.4
MAY 213 6.1
JUNE 123 3.5
JULY 111 3.0
AUGUST 124 3.5
SEPTEMBER 129 4.3
OCTOBER 157 5.2
NOVEMBER 226 7.2
DECEMBER 240 7.6
(v) The value of V shall be limited to maximum and minimum values in respect of the calendar month under consideration as follows:
(a) If V is negative and its absolute value exceeds Nn then V shall be taken as equal to minus Nn.
(b) If V is greater than the figure tabulated hereunder in respect of the month and gauging station under consideration then V shall be taken as equal to the tabulated figure.
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
14 11 12 14 16 21 21 21 20 19 17 15
(vi) Negative values of V shall be disregarded when applying the provisions of this clause to any extension of the contract period that has arisen as a result of calculation pursuant to this clause.
The total adjustment of the Contract Period shall be the algebraic sum of the monthly totals for the time for completion or extended time for completion.
Extensions of time for part of a month shall be calculated using pro rata values of Nn, Rn and figures tabulated in Subclause 1214 b (iv) above.
If the total is negative, the time for completion shall not be reduced.
(c) (c) For the purpose of this clause, actual rainfall measurements shall be those made at Station V7885C P074 at Korovou.
(d) No additional cost whatsoever shall be certified in respect of any extension to the contract period arising pursuant to this clause whether included in the Bill of Quantities as a time related item or not, except where the payment is in respect of a service provided to the Engineer's supervisory staff.
1215 THIS CLAUSE HAS NOT BEEN USED.
1216 INFORMATION FURNISHED BY THE EMPLOYER
Certain information contained in these Contract Documents or provided separately is being offered in good faith but in the circumstances pertaining to the type of information supplied, no guarantee can be given that all the information is necessarily correct or representative of the in situ conditions.
More specifically this applied to all deflection surveys, soil tests, soil mapping, drilling results, geophysical surveys, geological reports, borrow pit information, material surveys and reports and similar information, the accuracy of which is necessarily subject to the limitations of testing, sampling, the natural variation of material and formations being investigated and the measure of certainty with which conclusions can be drawn from any investigations carried out.
It also applies to any Material Utilisation Diagram supplied, as the diagram may be subject to major alterations during the progress of the work, depending on site conditions.
The Employer accepts no liability for the correctness or otherwise of the information supplied or for any resulting damages whether direct or consequential should it prove during the course of the Contract that the information supplied is either not correct or not representative. Any reliance placed by the Contractor on this information shall be at his own risk.
1217 THIS CLAUSE HAS NOT BEEN USED
1218 PROTECTION OF THE WORKS AND REQUIREMENTS TO BE MET BEFORE CONSTRUCTION OF NEW WORK ON TOP OF COMPLETED WORK IS COMMENCED
(a) The Contractor is to provide temporary drainage works such as drains, open channels, banks, etc. and the furnish and operate temporary pumps and such other equipment as may be necessary to adequately protect, drain and dewater the works and temporary works. This will be in addition to any permanent drainage works specifically paid for separately.
(b) Care shall be exercised not to allow material in borrow pits to become excessively wet, to keep all completed layers properly drained, not to cause dumps of material on completed layer work to inhibit surface drainage or to form wet spots under and around dumps, and to protect all parts of the work against erosion by floods and rain.
Material shall not be spread on a layer that is so wet such as to damage underlying layers or prevent adequate compaction of overlying layers. Such wet layers shall be dried and recompacted or removed.
(c) Fill and cut slopes shall be promptly repaired whenever damaged by surface water. Where erosion occurs on high fill, the slopes shall be repaired by cutting back to form benches and compacting the backfill mechanically to the specified controlled densities, using suitable small equipment.
(d) Excavations for pipe drains, culverts, sewer drains, water mains, manholes, service ducts and similar structures shall be adequately protected against the possible ingress of water during rainstorms.
(e) All completed layer work shall be protected and maintained until the following layer is applied. Maintenance shall include immediate repairs to any damage or defects which may occur and shall be repeated as often as is necessary to keep the layer continuously intact and in a good condition.
(f) Before any completed layer is primed or a succeeding layer constructed thereon, any damage to the existing layer shall be repaired so that after repair or reconstruction if necessary, it will conform in all respects to the requirements specified for that layer. All repair work other than minor surface damage repairs shall be submitted to the Engineer before covering up.
The previously constructed layer shall also be thoroughly cleaned of all foreign material before construction of a succeeding layer or application of a prime coat, surfacing or surface treatment. The existing layer shall be thoroughly broomed and all dung, clay, mud and other deleterious material completely removed. Where necessary, the surface shall be sprayed with water before, during and after brooming to remove all foreign material.
Work performed as part of the above obligations shall not be measured and paid for separately and the cost thereof is to be included in the prices tendered for the various items of work requiring protection and for the Contractor's establishment on Site as specified in Section 1300.
1219 REMEDIAL WORK
When any part of the Works or any equipment or material is found upon examination by the Engineer not to conform to the requirements or is at any stage before final acceptance damaged so that it no longer conforms to the requirements of the Specifications, the Engineer may order its complete removal and replacement, at the Contractor's expense, with satisfactory work, equipment or material or he may permit the Contractor to apply remedial measures in order to make good any such defects or damage. The actual remedial measures taken shall at all times be entirely at the Contractor's own initiative, risk and cost, but subject to the Engineer's approval regarding the details thereof.
In particular, remedial measures shall ensure full compliance with the Specifications of the final product, shall not endanger or damage any other part of the Works and shall be carefully controlled.
For the guidance of the Contractor an indication is given below of what would normally be required in the more common cases of defects or damage, but the Engineer will in no way be bound to approve of or adhere to the measures given below as the actual remedial measures will be dictated by the circumstances of each particular case.
(a) Earthworks
(i) Where a cut slope has been over-excavated or undercut, backfilling will not normally be allowed and the entire slope may have to be retrimmed to obtain a uniform slope.
(ii) Where the floor of a cutting has been taken too deep, it will normally require backfilling and recompaction with selected gravel in the case of soil or gravel excavation and with crushed stone material or suitably sized rock in the case of hard excavations. All necessary measures shall be taken to drain away ground water that may accumulate in backfilled sections.
(iii) Excess width of fills will have to be trimmed down.
(iv) Where erosion has damaged the surface of cuts or fills the damage shall be made good by backfilling with suitable material and retrimming. In more serious cases benching may have to be cut back and backfilled by compaction with suitable small equipment and then retrimmed.
(v) Where excavated material has been allowed to spill over the edge of existing slopes, this surplus material shall be removed and the vegetation of the slope reinstated.
(b) Stabilising
Any sections failing to meet the requirements specified or damaged to the extent that they require breaking up and recompaction will have to be restabilised with the type and quantity of stabilising agent ordered by the Engineer. The Engineer may also order that the layer be removed entirely and replaced with fresh material to be stabilised.
(c) Local defects in pavement layers
Where remedial measures are taken to make good local defects, the length and width of the area to be repaired by machines shall be such as will be necessary to accommodate the full width of the machines used and a reasonable length to ensure effective operation.
The depth to which material will have to be removed will depend on the type of material. Gravel will require breaking up to a depth of at least 75 mm and crushed stone will usually require breaking up over its full depth. Asphalt material will normally require removal for its depth.
(d) Concrete
Concrete work will normally require the cutting back and complete removal of any weak or honeycombed sections and making good using special epoxy adhesives to bind fresh concrete to old concrete. Cracks, when permitted to remain, shall be injected with suitable epoxy compounds and test cores drilled to test the efficiency of the injection process.
1220 WATER
The Contractor shall make his own arrangements for procuring, transporting, storage, distribution and application of water needed for construction and other purposes, except where otherwise specified. No direct payment will be made for providing water and the cost thereof shall be included in the prices tendered for the various items of work for which water is needed.
Only clean water, free from undesirable concentrations of deleterious salts and other materials shall be used. The Contractor shall ensure that sufficient supply of water is at all times available to ensure continuity of work. All sources of water used must be approved by the Engineer.
1221 ELECTRICITY SUPPLY
The Contractor shall provide and maintain at his own expense his own electrical supply. This supply must be adequate to supply the areas set aside for the housing of his staff and for his own and the Engineer's Office, and for any housing of the Engineer's staff.
The Contractor shall provide and maintain all necessary temporary power and lighting and all associated apparatus for the duration of the Contract at his own expense.
Once equipment becomes redundant and having received the approval from the Engineer the Contractor shall disconnect and remove said equipment and make good any works disturbed at his own expense.
1222 PAYMENTS AND TOLERANCES
The work specified in the various sections of these Specifications shall comply with the various dimensional and other tolerances specified in each case. Where no tolerances are specified, the standard of workmanship shall be in accordance with normal good practice.
No representation is made that the full specified tolerances will be available independently of each other and the Contractor is cautioned that the liberal or full use of any one or more tolerances may deprive him of the full or any use of tolerances relating to other aspects of the work. The latter would apply particularly in respect of level tolerances on layer work and the related requirements regarding layer thicknesses.
In the description of certain pay items, where it is stated that quantities will be determined from the "authorised" dimensions, this shall be taken to mean the dimensions as specified or shown on the Drawings or, if changed, as finally instructed by the Engineer, without any allowance for tolerances specified.
If the work is therefore constructed in compliance with the "authorised" dimensions plus or minus any tolerances allowed, quantities will be based on the "authorised" dimensions regardless of the actual dimensions to which the work is constructed.
Where the work is not constructed in accordance with the "authorised" dimensions, plus or minus any tolerances allowed, the engineer may nevertheless in his sole discretion accept the work for payment. In such cases no payment will be made in respect of quantities of work or material in excess of those calculated from the "authorised" dimensions and where the actual dimensions are less than the "authorised" dimensions, minus any tolerance allowed, quantities for payment shall be based on the actual dimensions as constructed.
1223 DRAWINGS
The Contractor shall prepare neat, stencilled, true to scale reproducible drawings on plastic film of the whole works "as constructed". The drawings shall be produced to a standard similar to that of the Contract Drawings.
Record drawings shall include the positions and extent of all support construction left in any excavations and exact locations of all services encountered during construction. The Contractor shall also prepare annotated longitudinal sections showing soils encountered during all excavation work.
For all reinforced concrete structures record drawings shall be prepared showing all reinforcement "as fixed".
Record drawings shall be prepared to the Engineer's approval as the work proceeds and shall be handed to the Engineer on completion. The Record Drawings shall then become the property of the Employer.
Should the Contractor require further drawings that may be necessary for the execution of the Works he shall prepare and submit such detailed drawings with adequate notes in writing for the Engineer's approval.
The Engineer may within a reasonable period approve, amend or change these drawings or may require the Contractor to produce amended drawings. All drawings shall be subject to approval by the Engineer but any approval of drawings shall not relieve the Contractor of any of his obligations under the Contract.
Accepted drawings shall form an integral part of the Contract Documents and any drawings not accepted and signed shall not be permitted on the Site of Works for construction purposes and/or used for the manufacture of any item. Notwithstanding the approval and/or acceptance and signing of the drawings the Contractor shall take full responsibility for all details, discrepancies, omissions, errors, etc. in respect of the said drawings as well as the consequences thereof.
The Contractor shall submit only fully completed drawings in accordance with this specification and shall not be entitled to claim for delays resulting from the submission of incomplete drawings. The Engineer shall require a period of four to eight weeks depending on circumstances, for reviewing the complete drawings.
No direct payment for design preparation and submission of drawings shall be made and all costs shall be included in the prices tendered for the relevant pay items as provided for in the Bill of Quantities. The cost of reviewing the design/drawings shall be at the Contractor's expense if the necessity for such review arises from alternative designs proposed by the Contractor, designs of temporary works or necessary for rectification or remedial works.
1224 NOT USED
1225 PHOTOGRAPHIC RECORDS
The Engineer shall make photographs and other records to be agreed with the Contractor of the condition of the surfaces of the site immediately before entering upon them for the purpose of constructing the Works.
Each month, the Engineer shall make a set of up to 36 colour photographs illustrating progress of the Works, or any other photograph that he may deem necessary for record purposes.
The Contractor shall reimburse to the Engineer the cost of films, development and printing of two sets of photographs per film and the cost of good quality photograph albums sufficient to accommodate 36 photographs per month for the duration of the construction period.
The Contractor may at his option arrange for further copies of any of the Engineer's record photographs at his own cost and the Engineer shall make the negatives available to him for that purpose, or arrange copies on the Contractor's behalf at his sole discretion.
The copyright of all photographs shall be vested in the Employer and the Contractor shall not use any photograph for any purpose whatsoever without the Engineer's approval.
1226 THIS CLAUSE HAS NOT BEEN USED.
1227 ACCESS TO SITE
The Contractor shall make his own arrangements for access to the various parts of the Site where works are to be constructed but all such accesses shall be subject to the approval of the Engineer.
Where the access to the Site proposed to be used by the Contractor lies across the land of any third party the Contractor shall produce to the Engineer the written consent of the owner and the occupier of the land over which the access lies before making use of the same.
The Contractor shall also make a record to be agreed by the Engineer of the conditions of the surfaces of any land (and of any crops on such land) over which access lies before he uses it for access purposes and he shall keep all such surfaces in a reasonable state of repair during the executing of the Works. On the termination of the Contractor's use of such access he shall restore any lands, roads or other property to a condition at least equal to that existing before his first entry upon them.
1228 CO-OPERATION AT SITE
All work shall be carried out in such a way as to allow access and afford all reasonable facilities for any other contractor and his workmen and for the workmen of the Employer and any other person who may be employed in the execution and/or operation at or near the site of any work in connection with the Contract or otherwise.
The Contractor shall use his best endeavours to co-operate with such persons without interfering with them and shall observe all the instructions and orders of the Engineer in that connection.
In the preparation of his programme of work the Contractor shall at all times take full account of and co-ordinate with the programming of work of other contractors.
1229 ROADS AND SITE TO BE KEPT CLEAN
The Contractor shall take great care and all reasonable precautions to ensure that roads and thoroughfares used by him either for the construction of the Works or for the transport of plant, labour and materials are not made dirty as a result of such construction or transport and in the event of their becoming thus dirtied in the opinion of the Engineer the Contractor shall take all necessary and immediate steps to clean them.
1230 SECURITY OF THE WORKS
Watching of the Works shall be provided by the Contractor at his own expense. If the Engineer considers it necessary he will order in writing that additional watchmen be provided all at the Contractor's expense.
1231 SUPPRESSION OF NOISE
The Contractor shall make every reasonable endeavour both by means of temporary works and by the use of appropriate plant or silencing devices to ensure that the level of noise resulting from the execution of the Works does not constitute a nuisance.
1232 SAFETY
The Engineer shall be notified by the Contractor immediately any accident occurs whether on Site or off Site in which the Contractor is directly involved which results in any injury to any person whether directly concerned with the Site or whether a third party. Such initial notification may be verbal and shall be followed by a written comprehensive report within 24 hours of the accident.
Transportation of any material by the Contractor shall be in suitable vehicles which when loaded do not cause spillage and all loads shall be suitably secured. Any vehicle which does not comply with this requirement or any of the local traffic regulations and laws shall be removed from the Site.
1233 METHOD OF WORKING
The Contractor shall adopt a method of working such as to permit the satisfactory and timely completion of the Works and to limit disturbance and damage to a minimum.
The Contractor shall only open up sections of the Works for which his resources are sufficient to maintain continuous and methodical progress. If in the opinion of the Engineer, the Contractor has not complied with the foregoing, he shall be entitled to suspend sections of the works pursuant to Clause 40(d) of the General Conditions of Contract until other sections have been completed to a stage where risk of damage through exposure to traffic and the elements and inconvenience to public traffic has been minimised.
Constructional Plant used in the execution of the Works shall be of a design and used in a manner approved by the Engineer.
The Engineer may at any time withdraw his approval for any method of working proposed by the Contractor and the Contractor shall immediately adopt another method of Working. If such change shall be required to achieve satisfactory progress or workmanship, the Contractor shall have no claim against the Employer for costs incurred by him in changing the method of working or in the provision and use of other plant.
1234 TEMPORARY WORKS
The Contractor shall provide, maintain and remove on completion of the Works all temporary works necessary for the construction of this permanent works. All temporary works shall be properly designed and constructed to carry such loads as may be imposed upon them and shall be safe and suitable in every respect for providing access or carrying plant or for the construction of the Works or other purposes.
The Contractor shall, at least 28 days before the commencement of any part of the Works, submit, in duplicate, drawings and calculations relating to the strength, stability and anticipated defections in respect of all temporary works and showing the methods he proposes to adopt for the construction of the various parts thereof.
Any modifications that the Engineer may require, either before, during or after construction of the temporary works, shall be made by the Contractor without charge. No approval or alteration made on the instructions of the Engineer of any submitted design or any of the temporary works shall relieve the Contractor from any liability or obligation under the Conditions of Contract in respect of such temporary works. The Contractor shall be responsible for all negotiations with public or private bodies concerned relative to temporary works. All proposals for temporary works shall be sent to the Engineer for comment before submission to such bodies. |
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发表于 2006-8-13 21:37:00
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