Soil investigation for Provn of Four (ORP) Blast pens with Link taxi track and allied work services at AF Stn Chabua

Amount

BOREHOLES (08 Nos):- The following works are to be carried out for sub surface investigation report:- (a) Boring through sand/clays/soft strata from ground level to 10 m depth or depth of refusal wherever is meat earlier. (b) Conducting standard penetration test in the bore as per IS : 2131-1985 including collecting disturbed samples at every 0.5 mtr or change of strata 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 analysis. (iii) Natural Moisture content. (iv) Liquid and plastic limits, swelling index. (v) Shear characterstics of undistrubed samples using direct shear/triaxial shear test. (vi) Unconfined compression test. (vii) Consolidation test for consolidation properties. (viii) Chemical tests for availability of soluble chloride and sulphate. (d) Subsurface investigation report to include clearly following parameters:- (i) Lay out of trial pits & bore holes on proposed site plan. (ii) Record of boring as per Appx 'D' of IS 1892. (iii) Soil/Rock Properties as per detailed exploration ( Table 3 of IS 1892 and sub para vi above). (iv) Soil properties based on above field tests.

(v) Evaluation of safe bearing capacity based on shear failure and settlement failure criteria (Refer IS 1904-1986), (IS 8009 Part 1 &2). Allowable bearing capacity at various depths of 1.5 mtr, 2 mtr and 3 mtr or as required below GL is to be given with suggestion for economical width and type of foundation. The report shall be include detailed calculations for SBC. In case of low bearing capacity commendation may be include bearing capacity calculation SBC & Settlement calculation for raft foundation also. (vi) Recommendation for pile with pile capacity in case weaker strata is encountered. (vii) Other relevant recommendations for foundation and improvement of soil if necessary. (viii) Recommendation of existing soil for backfill purpose.

(e) Testing method shall be strictly in accordance to relevant IS code.

BOREHOLES (04 Nos)

The following works are to be carried out for sub surface investigation report:-

(a) Boring through sand/clays/soft strata from ground level to 5 m depth or depth of refusal wherever is meat earlier.

(b) Conducting standard penetration test in the bore as per IS : 2131-1985 including collecting disturbed samples at every 0.5 mtr or change of strata 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 analysis. (iii) Natural Moisture content. (iv) Liquid and plastic limits, swelling index. (v) Shear characterstics of undistrubed samples using direct shear/triaxial shear test. (vi) Unconfined compression test. (vii) Consolidation test for consolidation properties. (viii) Chemical tests for availability of soluble chloride and sulphate.

(d) Subsurface investigation report to include clearly following parameters:- (i) Lay out of trial pits & bore holes on proposed site plan. (ii) Record of boring as per Appx 'D' of IS 1892. (iii) Soil/Rock Properties as per detailed exploration ( Table 3 of IS 1892 and sub para vi above). (iv) Soil properties based on above field tests. (v) Evaluation of safe bearing capacity based on shear failure and settlement failure criteria(Refer IS 1904-1986),(IS 8009 Part 1 &2).Allowable bearing capacity at various depths of 1.5 mtr, and 2 mtr as required below GL is to be given with suggestion for economical width and type of foundation .The report shall be include detailed calculations for SBC. In case of low bearing capacity recommendation may be include bearing capacity calculation SBC & Settlement calculation for raft foundation also. (vi) Recommendation for pile with pile capacity in case weaker strata is encountered. (vii) Other relevant recommendations for foundation and improvement of soil if necessary. (viii) Recommendation of existing soil for backfill purpose.

(e) Testing method shall be strictly in accordance to relevant IS code.

PLATE LOAD TEST (04 Nos)

Determination of ‘K’ value [modulus of sub-grade reaction (K-value)] of soil in field in accordance to relevant IS code complete all as specified and directed with and including following operations:-

(a) To determine modulus of sub-grade reaction of soils , bearing capacity of soil.(Generally known as K-value of the sub-grade) for evaluation of strength of sub grade for Runway pavements. Plate load test shall be carriedout at formation level considering runway section at that point as directed by Engineer-in-Charge.

(b) Equipments required at site for conducting test consists of bearing plates, loading equipments and instruments to measure the applied loads and determining the resulting settlement of deflection are as under:-

(i) Bearing plate shall be 75cm x 75cm of thickness 25mm is to be used for the test.

(ii) Loading equipments consists of a dead load and hydraulic jack capacity 50 Ton (50000.00 Kg). PCC cubes only to be used for loading the plate. No sand bag or any other such type of load shall be allowed at site for loading.

(iii) Settlement measurements shall be made by means of 03 Nos. (three numbers) Dial gauge with on accuracy of 0.01mm fixed on the periphery of the bearing plate from a datum bar. The datum bar should be supported for from the loaded area.

(c) Method of test:- Testing method shall be strictly in accordance to relevant IS code.

BOREHOLES (08 Nos)

The following works are to be carried out for sub surface investigation report:-

(a) Boring through sand/clays/soft strata from ground level to 10 m depth or depth of refusal wherever is meat earlier

(b) Conducting standard penetration test in the bore as per IS : 2131-1985 including collecting disturbed samples at every 0.5 mtr or change of strata 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 analysis. (iii) Natural Moisture content. (iv) Liquid and plastic limits, swelling index. (v) Shear characterstics of undistrubed samples using direct shear/triaxial shear test. (vi) Unconfined compression test. (vii) Consolidation test for consolidation properties. (viii) Chemical tests for availability of soluble chloride and sulphate.

(d) Subsurface investigation report to include clearly following parameters:- (i) Lay out of trial pits & bore holes on proposed site plan. (ii) Record of boring as per Appx 'D' of IS 1892. (iii) Soil/Rock Properties as per detailed exploration ( Table 3 of IS 1892 and sub para vi above). (iv) Soil properties based on above field tests. (v) Evaluation of safe bearing capacity based on shear failure and settlement failure criteria (Refer IS 1904-1986),(IS 8009 Part 1 &2). Allowable bearing capacity at various depths of 3 mtr, 3.50 mtr, 4.00 mtr, 4.50 mtr and 5.00 mtr or as required below GL is to be given with suggestion for economical width and type of foundation .The report shall be include detailed calculations for SBC. In case of low bearing capacity commendation may be include bearing capacity calculation SBC & Settlement calculation for raft foundation also. (vi) Recommendation for pile with pile capacity in case weaker strata is encountered. (vii) Other relevant recommendations for foundation and improvement of soil if necessary. (viii) Recommendation of existing soil for backfill purpose.

(e) Testing method shall be strictly in accordance to relevant IS code.

Notes for item No. 1 to 1.3: (i) All the reports/ results will be got vetted from any of the IIT’s or Govt Engineering College's after approval from GE/ Engineer-in-Charge. (ii) Submission of (04) Four copies of test report with detailed description for field investigation as mentioned above shall be submited by contractor.

AAHANA ENTERPRISES

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