CONSULTANCY SERVICES FOR SOIL INVESTIGATION FOR PROVN OF SUB GUARD ROOM ALONGWITH GATES AND HIGH RISE SHED ENTRANCE INCLUDING IMPROVEMENT OF DRAINAGE SYSTEM AT AF STN PURNEA UNDER GE (AF) PURNEA

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1. CONSULTANCY SERVICES FOR SOIL INVESTIGATION FOR PROVN OF SUB GUARD ROOM ALONGWITH GATES AND HIGH RISE SHED ENTRANCE INCLUDING IMPROVEMENT OF DRAINAGE SYSTEM AT AF STN PURNEA UNDER GE (AF) PURNEA:- BOREHOLES. The following works to be carried out for sub surface investigation report:- (a) Boring through sand/clay/soft strata from ground level to 10 Mtr depth of refusal wherever is meet earlier. (b) Conducting standard penetration test in the bore as per IS:2131-1985 including collecting distrubed samples at every 0.5 Mtr or change of starata including packing and handling all complete and collecting undisturbed soil samples at 1.0 Mtr or change of strata including packing and handling all complete as per IS:2132-1985. (c) Carrying out laboratory test for :- (i) Specific gravity, bulk and dry density. (ii) Grain size anylasis.. (iii) Natural Moisture content. (iv) Liquid and plastic limits, swelling (v) Shear characteristics of undisturbed samples using direct shear/triaxial shear test. (vi) Unconfined comprassion test. (vii) Consolidation test for consilidation properties. (viii) Chemical test for availibilty of soluble chloride and sulphate.

(d) Subsurface investigation report to include clearly following parameters :- (i) Layout of trial pits & bore holes on proposed site plan. (ii) Record of boring as per Appx"D" of IS-1892. (iii) Soil/Rock proprties as per detailed exploration (Table 3 of IS 1892 and sub para VI above). (iv) Soil properties based on above field test. (v) Evaluation of safe bearing capicity based on shear failure and shettlement failure creteria (Ref IS-1904-1986), (IS-8009 Part I & II), allowable bearing capacity at various depths of 1.5 Mtr, 2.0 Mtr and 3.0 Mtr or as reqd below GL is to be given the suggestion for economical width and type of foundation. The report shall be include detailed calculations for SBC. In case of few bearing capacity recomondation may be include bearing capacity calculation SBC & settlement calculation for raft foundation also. (vi) Recomondation for pile with pile capacity in case weaker strata is encountered. (vii) Other relevant recomondations for foundation and improvement of soil if necessary. (viii) Recomondation of existing soil for backfill purpose. (e) Testing method shall be strictly in accordance to relevant IS code. (f) Soil investigation report, mobilization of equipment and manpower to project site and submission of report 04 copies in CD and hard copy.

PRANTIK ASSOCIATES

C B ENTERPRISE

ACHARYA ASSOCIATES

ANIRUDDHA SANYAL