Survey and soil investigation for reconstruction restrengthening of certain damage retaining walls under Para 35 due to heavy rainfall in Old Mil Stn Gangtok

Amount

Mobilization of necessary eqpt and manpower to the project site and dismantling of the same of completion of Fd work from site complete all as specified and as directed.

Shifting of necessary eqpt and man power from one site to another within 500 mtr for carrying out erection including dismantling of boring eqpt at specified location complete all as specified and as directed.

Provision of bore holes 150mm dia in any type of soil upto max 10 mtr or upto refusal (N=100) whichever meet after including connection of undisturbed sample from cohesive standard penetration test at 1 Mtr, 1.5 Mtr, 2 Mtr interval thereafter or on change of strata complete all as specified and as directed.

Completion of laboratory test, collection of data and preparation of draft report with software, final copy printing and submission of report 5 (five) booklet suggesting the type of foundation different depth of bearing capacity minium depth of foundation also to be recommendation as per relevant IS code complete all as specified and as directed. Note :- Following parameters will also form part of the Geo-Exploration Report to be submitted by Soil Consultant. (A) RL of the ground level/foundation level with ref to a BM should invariabily be mentioned in the soil investigation report. Recommended SBC should be given for :- (i) All the bore holes. (ii) Minimum at three depth viz 1.5m, 2.0m, 2.5m below NGL. (iii) SBC should be work out forstrip footing of width (a) 1.5m (b) 2.0m(c) 2.5m (d) 3.0m (B) Photographic record of geo-exploration as well as testing shall also part of the report. (C) Recommendation as regards possiblity of liquidification of soil in case of saturated or partially saturated loose/uncompacted sandy soil. (D) Swelling index and selling pressure in respect of black Cotton soil and its depth/layer(If any). (E) Depth of Gr. Water Table (GWT) in peak monsoon(lowest) and peak summer (highest) after correlation of result with seasonal of water table in the station. (F) Recommendation of filling under floors.

PRANTIK ASSOCIATES