Bhabha Atomic Research Centre Tender

Seismic Refraction Survey including data acquisition, data processing for deciding suitability of lanslide location and also for interperation of strata at different depths. The work includes survey work for picking up co‐ordinates of the geophones locations; service of engineers, scientists, surveyors, draftmens, CAD operators, labours & helpers and others as specified by engineer ‐ in ‐ charge.

Carrying Electrical resistivity test for evaluating ground water level and its variation along with subsurface stratification, ground profiling by Schlumberger four electrode method including submission of comprehensive report with interpreted results for layer thickness and resistivities in triplicate. The test is to be conducted as per IS:1892 ‐1979 (Reaffirmed in 2002), IS:15736‐2007 (Reaffirmed in 2012) covering whole plan area upto depth of exploration 100m ‐ 150m below existing ground level.

B. Geotechnical Investigation Mobilisation and demobilisation of suitable boring plant and all other allied equipments like Minimum 2 boring rigs or as required number of boring rigs to complete the job in time, survey equipments and all other insitu tests equipments and manpower required to complete the scope of this work.

Drilling vertically through all type of strata, using Nx size diamond bit, using double tube core barrel with suitable core catcher, including collection and logging of cores, placing them in approved wooden core boxes as per relevant IS numbering each core, noting the lithology, colour photographs (100X150mm size) of rock cores, locking arrangements, labeling and transporting the boxes to core store/laboratory as directed by EIC etc., all as per specifications for the following depths measured from existing ground level and collection of ground water samples for evaluation of ground water level and their variation as per IS:1892‐1979 (reaffirmed in 2002), IS:6935‐1973(reaffirmed in 2012) from each borehole at specified depths (minimum 1 litre) including all provisions of sampling, packing, sealing and labeling as specified and including handling charges etc. All as per specifications. 0 m to 50 m. From G.L.

Conducting In‐situ Pump‐in Permeability test by double packer cyclic method in weathered and hard rock of 3m test section upto maximum presssure of 10Kg/sq.cm, all as per IS: 5529 (Part 2)‐2006 to evaluate permeability. Each unit of this item shall consist of a series of tests with pressure of three(3) equal increments to the maximum and three(3) equal decrements etc., as per specifications. The test is to be conducted in specified boreholes

C. Laboratory Test on Soil Sample Determination of Grain size distribution,percent fines of soil sample by conducting Grain Sieve analysis & Hydrometer analysis as per IS:2720(PART 4) ‐1985(Reaffirmed in 2006). The test is to be conducted on one or more DS(disturbed sample ) & UDS(undisturbed sample) collected from each bore hole

Determination of soil classification, identification, evaluating percent fines as per IS:1498‐1970(Reaffirmed in 2007).

Determination of Specific gravity by Pycnometer method test as per IS2720 (Part III/Sec1 or Sec2 )‐1980 (reaffirmed in 2002)

Determination of Natural Moisture Content from UDS/DS by oven drying method as per IS : 2720(Part II) ‐ 1973

Determination of Liquid limit, plastic limit atterberg limits and plasticity index of soil sample as per IS: 2720 (part5)‐1985 Reaffirmed in 2006.

Determination of Shrinkage limit and shrinkage ratio of soil sample as per IS: 2720 (part‐VI)‐1972 Reaffirmed in 2001.

Carrying out Direct Shear Test (for cohesionless soil) as per IS:2720 (Part 13)‐1986 reaffirmed 2002) to evaluate Cohesion and Angle of internal friction

Carrying out Triaxial Shear Test (UUT) (for cohesion soil) as per IS:2720 (Part 11)‐1993(Reaffirmed 2002) to evaluate Cohesion and Angle of internal friction

Carrying out Consolidation test as per IS:2720 (Part 15)‐1965(Reaffirmed 2002) to evaluate consolidation properties of soil

Carrying out Proctor Density Test as per IS:2720 (Part 7)‐1980 to evaluate Bulk density, Dry Density, Optimum Moisture Content. The test is to be conducted on one or more DS (undisturbed sample ) collected from each borehole.

Carrying out California Bearing Ratio on DS sample as per IS:2720 (Part 13)‐1987. The test is to be conducted on one or more DS (undisturbed sample ) collected from each borehole

Carrying out Chemical analysis of sub soil samples to evaluate chemical characteristics of soil including pH,Sulphates(SO3&SO4), chloride and nitrate contents,organic matter, chemicals salinity and any other chemicals harmful to the foundation material as per IS: 2720 (Part 23,24,25,26 and 27) in an approved laboratory

D. Carrying out Laboratory Test on Rock Core Samples Bulk Density & Porosity as per IS 13030 (1991)

Water Absorption as per IS 1124 (1974)

Specific gravity as per IS 1124 1974

Uniaxial Compressive Strength as per IS 9143 (1979)

Modulus of Elasticity & Poisons Ratio as per IS 9221 : 1979 Reviewed In : 2021 to evaluate Youngs modulus & poissons ratio of the rock

Triaxial Shear Strength as per IS 13047 (1991) to evaluate Cohesion and Angle of internal friction

Point Load Strength Index as IS 8764 (1998)

Indirect Tensile Strength as IS 10082 (1981)

Slake Durability Index Test as IS‐10050‐1981

Preparation and submission of draft report and final report containing geological information of the region, procedures adopted for investigations, field observations, summarized test data, conclusion and recommendations. The report shall include detailed bore logs, sub‐soil sections, field test results in both tabular as well as graphical forms, 1‐D, 2‐D & 3‐D model of sub‐ surface electrical resistivity with depth, supporting calculations for the conclusions drawn etc. The report should include the following details/plots/diagrams in addition to the above: 1) Litholog of each bore hole along with borehole correlation studies of lithology, RQD, RMR, total no of fracture in run, inclination wise no of fractures etc. 2) 3D RQD model using run wise RQD data of all boreholes. 3) Tables showing thickness and depth of distinct weak zones observed in individual boreholes. 4) Ground water table map. 5) Electrical resistivity sections for all the locations. Submission of geotechnical investigation report

E. Design and Analysis Preparation of design and analysis report using geotechnical numerical analysis softwares. All the inputs parameter required shall be drived from detailed geotechnical report. The work shall include perparation of construction drawings, detailed specification, construction methodology, material specifications etc,. The work shall also include preparation of detailed cost Estimate of the project with detailed BOQ and basis of cost estimate all complete.