Geotechnical Investigation work for HAEP II at HWP Hazira

Amount

PART – I : IN-SITU TESTS AND ACTIVITIES Mobilization of equipment’s (including rotary rigs), men and materials necessary for the field tests for item 2 to 14 below to the project site for carrying out the geotechnical investigation and demobilization of the same after completion of all the field works etc., all complete as per specification, drawings and as directed by the Engineer-in-charge.

Setting up of boring rig at each location, for each borehole location including moves between borehole positions, locating and marking the location on the ground by actual survey, setting up all field test equipment and bringing all personnel to the location, making area good for setting up rig etc. complete (including boreholes of cross borehole test). Any criss–cross or back and forth movement of the rig can take place, all as per drawing and as directed by the Engineer-in-charge

Making 150mm nominal diameter bore hole at various locations in all types of soil including weathered rock , soft rock , hard rock and boulders if any, using suitable approved method of boring including chiselling, cleaning, providing casing pipes as required or as directed; for collection of undisturbed soil samples at every 2m interval upto 10m depth below ground level and at every 3m interval beyond 10m depth; wherever undisturbed soil samples could not be collected; collection of disturbed soil samples and water samples, core drilling (NX size) in rock using hydraulic feed rotary and double tube core barrel with diamond bit including collection of core samples as per guideline of IS, keeping the cores in wooden core boxes , transporting the cores to laboratory , maintaing continues record of elevation of ground water table, core recovery and RQD as per technical specifications , drawings, IS guidelines, and as directed by Engineer-In-Charge. It also includes sealing and packing of samples, transportation of all the collected samples to the laboratory and back filling of boreholes with sand on completion of the same etc Excluding cost for SPT and Standard Cone Penetration tests (these shall be paid against item 4 & item 5 respectively), all complete as per specification and as directed by the Engineer-In-Charge.

a) 0 m to 10 m

b) 10 m to 20 m

c) 20 m to 30 m

d) 30 m to 40 m

e) 40 m to 50 m

Conducting Standard Penetration tests at every 1.5 m interval upto 20m depth below ground level and at every 3m interval beyond 20m depth upto a maximum depth of 50m measured from ground level, at change of strata and at depths; as per IS Standards

Performing dynamic cone penetration test at various locations using 65mm cone with circulation of bentonite slurry /without bentonite slurry etc all complete as per specification, drawings and as directed by the engineer-in-charge (up to refusal or 25m whichever is earlier )

Conducting Cross borehole test comprising of Five boreholes upto a minimum depth of 20m at various levels, including drilling of bore holes, providing PVC casing pipe of required diameter (6 kg/cm2), grouting annular space between the bore hole wall and PVC pipe, reaming to Px/Hx size from Nx sizes, backfilling with sand after completion of the test etc. all complete in accordance with IS 13372 / ASTM-D 4428, Excluding drilling of borehole which will be payed through item 03. as per specifications as directed by the Engineer-in-charge

Back filling of boreholes with 1:1 cement grout as per specifications upto 5m depth from ground level

Conducting electrical resistivity test at various locationsWenner's four electriode method as per IS: 3043, to find out resistivity upto maximum depth 15.0m below EGL as per specification, drawings and as directed by the Engineer-in-charge.

Conducting pump in type field permeability test by constant head or falling head method (suitability of type of test shall be as per site conditions) in various boreholes at specified depth including providing packers as required etc., all complete as per IS:5529, specification, drawings and as directed by the Engineer-in charge.(Excluding drilling boreholes which is covered in item 3)

Conducting static plate load test on foundation rock at the founding level each upto failure, whichever is earlier, including preparation of test surfaces, clearance, all equipments, materials and preparation of test reports; It also includes dewatering if required etc. complete as per IS:12070, specification, drawings and as directed by the Engineer-in charge.

Conducting cyclic plate load test in various locations at specified depth complete as per specification, drawings and as directed by the engineer-in-charge. Including Evaluation of dynamic properties of soil. Payment for making the pit of suitable size, maintaining it dry and backfilling etc shall be paid separately. It also includes dewatering if required etc. complete as per IS:12070, specification, drawings and as directed by the Engineer-in charge.

Installation of Piezometer to measure long term water fluctuation upto a maximum depth of 15.0m. Below E.G.L including supplying of water level measuring device. The device will be left at the observation borehole to measure and record long term water fluctuation. Initial observations upto the period of work order should be recorded and submitted.

PART–II:LABORATORY TESTS Density and Specifc gravity

Bulk Density, dry density, natural moisture content, specific gravity and Unit weight for soils

Chemical test

Organic content and Soluble salts in soil including pH value determination for soil

Conducting chemical test on water samples to determine the carbonate, sulphate, chloride and nitrate contents, pH value, turbidity, organic matter and any other chemicals harmful to foundation material etc., all complete as per specification.

Compressive strength

Un confined compressive strength on Undisturbed / Disturbed soil sample

Uni axial compression strength of rock

Conducting direct shear test on Undisturbed soil sample

Un drained

Drained

Un drained tri-axial compressive strength for soils

Sieve analysis

Hydrometer analysis

Liquid limit, plastic limit, plasticity index (Atterberg’s Limits) etc. for soils

Swelling Pressure test

Permeability test

Consolidation test giving all relevant information including but not limited to pressure versus void ratio curve. Compression index, pre consolidation pressure, coefficient of secondary compression, coefficient of consolidation, coefficient of volume compressibility.

PART III : REPORT Preparation and submission of draft report in two (2) copies for approval and approved signed copy of final report in five(5) hard copies and 2 soft copies on CD after the approval of draft report including all field records, laboratory test results,graphs,calculations, analysis of test results and recommendation etc., all complete as per IS Standard, Specifications. Including the approval of final soil report from renowned or dept approved IIT's/ NIT's professor Grade Geo-technical expert. The report shall include the conclusion for type of soil, Bore hole log sheet consisting of SPT data as per IS standards. Recommendations for Bearing capacity and subgrade modulus of soil at various depths from 1m to 4m level from ground level at every 0.5m intervals, type of foundation suggested with proper justification with tests results, Soil classification(Soft, medium, rock) as per IS:1893.

Xplorer Consultancy Services Pvt. Ltd. (BID ID -3304375)

Geo Designs and Research Pvt Ltd (BID ID -3306387)

M K Soil Testing Laboratory Private Limited (BID ID -3300843)

SOIL TEST AND FOUNDATION DESIGN (BID ID -3304267)

Cengrs Geotechnia Pvt Ltd (BID ID -3299667)

EMPIRE GEOTECHNIQUE PRIVATE LIMITED (BID ID -3304664)

Gaveshana Geosciences Pvt Ltd (BID ID -3306924)

Genstru Consultants Pvt. Ltd. (BID ID -3307742)