PRELIMINARY ACTIVITIES IN RESPECT OF AMWP WORKS FOR SOIL INVESTIGATION AND TOPOGRAPHICAL SURVEY FOR THE WORK PROVN OF DEFI MD ACCN FOR OFFRS JCOS AND OR AT BAMBOLIM UNDER GE PANAJI GOA PH 1 OF TWO PHS LIST 1SER NO 02 OF AMWP 2023 24

Amount

Conducting Soil investigation (Bore Holes) as per IS :1892-2021 by manually/calax rotary drilling of 100-150 mm diameter with casing pipe/bentonite slurry if required for supporting inner collapsible stratum below water table with pot holes/helical auger in any type of soil upto depth of 15 mtr. Conducting standard penetration test (SPT) at regular intervals and submit the the SBC report. Disturbed and undisturbed soil sample to be collected at a sampling interval of 1.00 mtr depths or at change of strata or as per relevant IS Code.

The following laboratory test are required to be conducted on disturbed soil and detailed result to be given in tabular form:- (i)Sieve analysis & Grain Size Grain size distribution by sieve analysis & hydrometer test (ii)Atterbergs Limits (iii)Natural Moisture Contents test (iv)Particle size analysis test (v) Bulk density/dry density

The following laboratory test to be conducted on undisturbed soil samples as considered necessary according to relevant specification of IS 2720 and detailed result showing all relevant calculations, inferences, indices and parameters shall be given in the soil report :- (i)Natural Moisture Contents test (ii)Bulk density (iii)Specific gravity Test (iv)Free Swell Index Test and swelling properties of soil. (v)Organic matter in soil if any. (vi)Consolidation test (compressed index value) (vii)Triaxial compression test and determination of shear parameters (C& $ test) as per relevant IS. (viii)Harmful salt (complete investigation as already ref).

Maximum and minimum levels of Ground Water in the area with source of information and Ground water Table observed during the observation.

Note :- (i) Additional Trial pit of size 1.20x1.2x3.00 mtr depth provided for each location will be provided in each location and rates are inclusive with BHs. (ii) SBC recommendation for all bore holes at a depth size 1.5 m,2.00 m , 2.5 m etc is required for following footings :- (a) 1.5mx1.5 m (b) 1.5 m x2.5 m (c) 2.00mx2.50 m (d) 2.00m x3.00 m (d) 2.00m x 3.5 m (e) 2.5m x3.00 m In addition recommendation on type of foundation including other parameter has to be provided by the consultant. (iii) Swelling index & swelling pressure in respect of Black cotton soil and its depths of layeres to be provided. (iv) Photographic record of geo-exploration as well as testing shall also be part of the report. (v) Recommendations as regards possibility of liquefaction of soil in case of saturated or partially saturate loose/uncompacted sandy soils. (vi) Depth of Ground water Table (GWT) in peak monsoon (lowest) and peak summer (Highest) after correction of result with seasonal variation of water table in the station. (vii) Recommendation for filling under floor/beams. (viii) Location duly marked on the site plan shall be part of the report.

Carrying out topographical survey by using total station with spot levels at 5m c/c and making of existing structure/features of ground incluing sumission of three sets of survey report containing contour plan @ 1m contour interval and block level plan with 3m c/c spot levels etc. All complete (Approx area 9.0 Acres)

Rishi Markandeshwar Engineering Consultant (BID ID -3102514)

GEO DESIGNS AND RESEARCH PVT LTD (BID ID -3116987)

GEO MEDIA ENGINEERING and CONSULTANCY SERVICES PRIVATE LIMITED (BID ID -3113692)