particular specifications (road works) - CIDCO Maharashtra Ltd.

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CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 454 SIZE OF PIPE Excavation in Ordinary soil Shoring in one stage Upto 3 M depth Above 3 M & upto 5 M depth Shoring in two stage more than 5 M depth Excavation in rock wherever it is met with Shoring in one stage upto 5 M depth Shoring in two stages More than 5 M depth 1000mm R.C. pipe 2.20 M 2.50 M 2.80 M upto 5 M 2.50 M below 5 M 2.20 M 2.50 M 1100mm R.C. pipe 2.30 M 2.60 M 2.90 M upto 5 M 2.30 M 2.60 M 2.60 M below 5 M 1200mm R.C. pipe 2.40 M 2.70 M 3.00 M upto 5 M 2.40 M 2.70 M 2.70 M below 5 M 1400mm R.C. pipe 2.70 M 3.00 M 3.30 M upto 5 M 2.70 M 3.00 M 3.00 M below 5 M 1600mm R.C. pipe 2.90 M 3.20 M 3.50 M upto 5 M 2.90 M 3.20 M 3.20 M below 5 M 1800mm R.C. pipe 3.10 M 3.40 M 3.70 M upto 5 M 3.10 M 3.40 M 3.40 M below 5 M 4.0 DEPTH OF EXCAVATION OF TRENCHES The depth for the trenches will be calculated from the surface to the bed of the pipes and in case when a layer of concrete/or precast blocks are required to be placed below the pipeline, the depth of the bottom of the concrete/or the block below the underside of the pipeline will be paid. The depth of excavation for manhole shall be measured from the surface of the existing ground level to the bottom of foundation. No payment will be made for any excavation beyond this width or depth.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 455 5.0 MEASUREMENT LENGTH OF EXCAVATION The lengths of excavation for trenches will be measured from and clear of the settled width allowed for the excavation of trench from which it starts on which it come into contact and the centre of the pipe or masonry for which the trench has been excavated shall be considered as the centre of such trench. 6.0 A GRIP TO BE CUT WHERE PIPE SOCKET OCCURS Wherever a pipe socket occurs a grip is to be cut in the bottom of the trench or concrete bed to a depth of atleast 75 mm below the bed of the pipe so that the pipe may have a fair bearing on its shaft and to rest upon its socket. Such grip shall be of sufficient size in every respect to admit the hand all around the socket in order to make the joint, and the grip shall be maintained clear until the joint has been passed by the Engineer. 7.0 TRENCHES IN ROCKY GROUNDS The trenches for pipe drains, if in stony or rocky ground, are to be excavated all along to the full depth of 75 mm below the intended level of the bed of the pipes to be laid therein, and layer of soft clean earth 75 mm thick is to be deposited for the reception of the pipes and in case where a layer of the concrete and/or precast block is required to be placed below the pipe line, the bottom of the excavation shall not be higher at any point than the bottom of the concrete layer or block. Wherever excavation is done in rock, the excavated stuff shall be stacked separately for chiselled rock and blasted rock. The excavation shall be paid or stack measurement with deduction of 40% for voids to be made from the stack measurement.
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