GAIL (India) Limited

81.8 DE-WATERINGWork for excavation shall include bailing or pumping out water which may accumulate in the excavationduring the progress of work either form subsoil, seepage, springs, rain or any other cause and divertingsurface flow if any by bunds or other means. Pumping out water shall be done in such approved manneras to preclude the possibility of any damage to the foundation trenches, concrete or masonry of anyadjacent structure. When water is met with in foundation trenches, pumping out water shall be from anauxiliary pit of adequate size dug slightly outside the building excavations. The depth of the auxiliary pitshall be more than the working foundation trench levels. The auxiliary pit shall be refilled with approvedexcavated materials after the de-watering is over.The excavation shall be kept free from water -1. When Concrete/Reinforcement work/water proofing work is in the progress.2. Till the Consultant consider that concrete/mortar is sufficiently set.1.9 SURPLUS EXCAVATED MATERIALAll excavated material certified as surplus and not useful, shall be removed by the Contractor from thesite in an approved manner at his own cost and risk so as indemnify owner from any claims any time ofwhatsoever nature.1.10 CONTRACT SUM TO INCLUDEApart from other factors mentioned elsewhere in this contract, the contract sum shall also include for thefollowing(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)Clearing siteSetting out works, profiles etc as required and setting up bench marks and other reference marksProviding shoring and strutting and subsequently removing the sameBailing and pumping out water as required and directedExcavation at all depth (unless otherwise specified in the drawings) and removal of all materialsof whatever nature wet or dry and necessary for the construction of foundation etc. and preparingbed for laying concreteSorting out useful excavated materials, transporting them beyond the structure and stacking themneatly on the site for back-filling or reuse as directedBack-filling the trenches alongside masonry or concrete with approved excavated material up tothe natural ground level including watering and rammingNecessary protection (including labour, materials and equipment) to ensure safety against risk oraccidentDrilling of small holes as directed to explore the nature of substratum if necessaryExcavation in soft rock/hard rock if necessary.2. SPECIFICATIONS FOR ANTIITERMITE TREATMENT2.1 GENERALPrevention of termite from reaching the super structure can be achieved by creating a chemical barrierbetween the ground and the building by treating the soil beneath the building and around the foundations.The work shall be carried out as per IS 6313 part II. of 2001 or the latest edition.This shall be provided to sides and bottom of trenches and footings including treating the backfill offoundations up to ground level and the vertical surface of wall, and filling of each under floors andtreating the surface at ground level 900 mm around the building.2.2 MATERIALAnti termite treatment, shall be carried out strictly in accordance with CPWD specifications usingChloropyrifos (CPP) an Emulsified concentrate @ 1% concentration or any other approved chemical.