Geotechnical Investigations at Fresh water lake Flat Bay, Port Blair

Amount

Mobilisation and Demobilisation

Mobilisation and Demobilisation of all required equipment (Drilling rigs, Jack up Platform / Barge, boat etc.), shifting platform with all required components including using DGPS and man power at project site (Flat bay) for carrying out Geotechnical Investigation as per technical specification

Field Work: Boring of marine boreholes (20nos) not less than 150mm dia vertically below the natural sea bed level in all types of soils up to a depth of 40 m and performing standard penetration test at every 2m interval, collection of undisturbed soil sample at every 2m sample, soil and water samples complete including storing, transporting of samples to laboratory all complete as directed by the engineer in charge and as per technical specification.

Core drilling in rock strata below the natural sea bed level in all types of rocks using double tube barrel using NX size diamond bit and collection of rock cores and water samples including storing, transporting of samples to laboratory all complete as per technical specifications and as per directed by engineer in charge.

Laboratory Test Collection & analysis of soil samples and conducting chemical test for following standard parameter viz. Sulphate Content (water extract) Chloride Content pH measurement Nitrate Content Sodium Content Potassium Content Calcium Content

Collection & analysis of water samples and conducting chemical test for following standard parameter viz. Sulphate Content (water extract) Chloride Content pH measurement Nitrate Content Sodium Content Potassium Content Calcium Content

Collection & analysis of soil samples and conducting following standard tests as per IS codes viz. Sieve Analysis

Atterberg’s Limit tests

Natural Moisture Content

Bulk & Dry Density / Unit Weight

Unconfined Compressive Strength Test

Collection & analysis of rock samples and conducting following standard tests as per IS codes viz. Density Specific Gravity Porosity Water absorption

Special Tests Consolidation test 3-4 /Borehole These tests are required where consistency of Clay changes (1) Compression index (Cc); (2) (Coefficient of consolidation (Cv & Ch); (3) Coefficient of permeability (Kv, Kh); (4) Pre‐consolidation Pressure; (5) (e) Secondary compression index (Cα);

Index test Every samples collected for consolidation and triaxial test (1) Unit weight; (2) Grain size distribution; (3) Liquid limit & Plastic limit; (4) Water content;

Swell Pressure test 1/Borehole

Triaxial test (UU & CU) 3-4/Borehole Undrained shear strength (Su), C' and ɸ'

Organic content test 1/Borehole Organic content determination.Top layer (1 to 2m )

Water chemistry Various chemical content of water. Water chemistry to evaluate possible aggressivity towards concrete or other construction materials

Clay minerals content Clay minerals‐Kaolinite, Montmorillonite, illite etc

Report Preparation and submission of two (2) copief of Inception Report, three (2) copies of Draft report (factual and interpretation) as specified and three (3) copies of the final report (factual and interpretation) of Geotechnical investigations with recommendations on incorporating clients comments. The approved report shall also be submitted on one CDs. Report shall include photograph of rock cores / soil samples, rock exposures and other feature, pits etc.

C E TestingCompany Pvt Ltd

Fugro Geotech (India) Pvt. Ltd.