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. 522 Diameter of pipeline in mm Width allowed in meter Depth allowed in meter 300 0.750 1.100 350 0.800 1.150 400 0.850 1.200 450 0.900 1.250 500 1.000 1.700 600 1.000 1.900 800 1.300 2.500 Extra width of trenches over and above the stipulated width shall be permitted by engineer in writing where either the site conditions demand it or where wide trenches are necessary for carrying out special works such as making cross connections, fixing appurtenances, providing anchor blocks etc. Similarly, if for any reason the engineer orders the depth of trenches to be increase such as for crossing utilities, the contractor shall do so and shall be paid for according to the rates quotes. 1.1 For the purpose of measurements, steel tapes and leveling instruments shall be used to determine the dimensions of excavation work. The width will be measured at the bottom of the pipe. The thickness of murum bedding if provided, will be considered separately. Boulders measuring above 1/20 cubic metre in volume, met within the excavation will be jointly measured on spot immediately they are met with and before they are removed. As soon as they are removed from excavation and measured they must be broken or disposed off as directed by the Engineer.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 523 1.2 The bed of trenches shall be prepared to confirm to the typical section shown in the drawing. In case of earth murum, soft rock, excavation shall be carried out to such a depth as required to lay the pipe line on the bed directly. In case of hard rock, murmur, marine clay or black cotton soil, additional depth of 150 mm will be filled up with approved earth or murum. The bed of trench shall be well rammed. The murum or approved earth bedding will be paid separately under respective items. 1.3 Stacking of excavated material : All excavated material shall have to be stacked spread within 50 metres form the place of excavation including all lifts, no materials are to be stacked or spread close to the edge of the trenches. The Contractor shall stack the material in such a manner as to accommodate maximum quantity in minimum space. For this purpose loose materials shall be stacked in enclosure of harder stuff. Separate shall be made of such materials as can be re-used such as broken asphalt, good quality rubble etc. Separate stacks shall also be made of earth and murum which is required for refilling the trenches particularly for portion around the pipes. The contractor shall note that a part of excavated materials which will become surplus after refilling the trenches will have to be carried away for filling the low lying area. In order to avoid congestion at work site, the contractors shall carry away the part of the surplus quantities of earth considered unsuitable for filling right from the start in consultation with the Engineer. Removal of surplus earth beyond lead of 50 metres will be measured separately and paid accordingly.
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particular specifications (road works) - CIDCO Maharashtra Ltd.

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