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. 336 the nature of the soil allow it. Where the nature of the soil or the depth of excavated trench/pit does not permit vertical sides, the Contractor at his own expense shall put up necessary shoring, strutting and planking or cut slopes to a safe angle or both with due regard to the safety of personnel and the works and to the satisfaction of the ENGINEER. b) The depth to which the excavation is to be carried out shall be as shown on the drawings unless the type of material encountered is such as to require changes, in which case the depth shall be as ordered by the ENGINEER. c) If contractor prefers for mass excavation of building, he may do so with the prior permission of ENGINEER. The payment of excavation and disposal shall be restricted only to minimum excavation allowed as per mode of payment. Excavation shall be fully protected against the slide and slopes. d) The material suitable for backfilling shall be stacked separately. 2.6.3.1 Excavation in all types of soil except rock: Shall mean excavation in vegetation soil, turf, loam, clay, mud black- cotton soil, earth murrum (hard or soft) shingle and generally any material which requires close application of picks or scarifies to loosen and not affording much resistance to digging. 2.6.3.2 Excavation in rock not requiring blasting: Shall mean excavation in lime stone, sand stone, laterite, hard conglomerate or other rock which can be quarried or split with crow bars or, wedges. This shall include unblasted boulders. 2.6.3.3 Excavation in rock requiring blasting: Shall mean excavation in hard rock requiring blasting encountered at places of excavations.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 337 The Contractor shall obtain license from District/Public authorities for carrying out blasting work as well for obtaining transporting and storing explosives as per 'Explosives Rules 1940' or as amended. He shall purchase the explosives, fuses, detonators etc. only from a licensed dealer. He shall maintain the account of explosives etc. purchased and used by him. He shall be responsible for safe custody and proper accounting of explosive materials. Contractor will be fully responsible for any breach of the aforesaid Act. Blasting shall normally be done with gun powder. Dynamite, Gelatin or any other high explosives shall only be used in special cases with written permission of the Architect and District authorities concerned under ‘Explosive Rules'. Blasting operations shall be carried out under supervision of a responsible representative of the Contractor during certain hours, preferably during lunch break as approved in writing by the Architect. The representative shall be conversant with the rules of blasting. Proper precautions for safety of persons shall be taken. Red flags shall be prominently displayed around the area to be blasted and all people on work except those who actually light the fuses shall be withdrawn to safe distance of not less than 100 meters from the blast. Blasting shall not be done within 100 metres of an existing masonry or any other kind of structure unless special precautions are taken by heavy blanketing etc. The Contractor shall be responsible for any damage to the person and/or property either directly or incidental to such blasting including his employees. Where blasting is not practical or is prohibited, excavation shall be done by wedging or chiseling and it shall be restricted to the quantity required to enable the necessary foundation to be put in. The item also covers bailing out subsoil water or rainwater including pumping at any stage of the work, shoring strutting etc.
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