|
| 1 | Exploratory drilling of boreholes down to required depth, drilling of 150mm dia. boreholes in all type of soils except hard rock & large boulders (boulder core more than 30cm) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion/chiselling tool for advancing through occasional seams of hard strata to be employed, where necessary in Dry area. |
| 2 | Exploratory drilling of Boreholes down to required depth, drilling of 150mm diameter boreholes in all type of soils except hard rock and large boulders (boulder core more than 30cm),including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chiselling tool for advancing throughoccasional seams of hard strata to be employed where necessary in River bed area including standing/flowing water with all necessary arrangements except making of platform under water which shall be paid under relevant item of SOR. |
| 3 | Drilling of NX size borehole (75mm dia.) in all types of hard rock (fresh rock) and collection of rock core samples from boreholes and preserving in boxes. |
| 4 | Taking out 100mm dia. & 450mm long undisturbed samples of soil from bore holes, including provision of air tight containers for packing and, labeling incl. transporting the samples to laboratory. Piston sampler shall be used for extracting undisturbed samples where necessary.Samples shall be collected as per IS:2720. |
| 5 | Conducting standard penetration test as per IS:2131 at approximate1.5m intervals in bore holes, as directed by the Engineer in charge |
| 6 | Collection of water samples at required intervals as directed by Engineer - in- charge |
| 7 | Conducting laboratory Tests on collected soil samples as per relevant IS code |
| 8 | Moisture Contents/Dry Density |
| 9 | Atterberg Limit |
| 10 | Specific Gravity |
| 11 | Grain size analysis including Hydrometer analysis |
| 12 | Natural Density |
| 13 | Direct Shear Test |
| 14 | Consolidation Test |
| 15 | Tri-axial Test |
| 16 | Conducting Laboratory tests on collected ROCK SAMPLES as per relevant IS code |
| 17 | Density Test |
| 18 | Water Absorption & Porosity |
| 19 | Unconfined Compression Test |
| 20 | Conducting chemical analysis of ground water samples to determine suitability for concreting and aggressiveness in relation to attack on concrete / reinforcement including determination of pH value |
| 21 | Conducting chemical analysis of soil samples to determine aggressiveness in relation to attack on concrete / reinforcement including determination of pH value |
| 22 | Preparation and submission of Final report giving complete and comprehensive record of investigations, laboratory test reports and calculations and recommendation in approved format. |
| 23 | Making & installation of floating platform for river bed including labour & skilled personnel required for soil investigation & exploration, shifting of drilling rigs frombore hole tobore hole & removing the same after satisfactory completion of work including restoration of the site as directed by the Engineer -Incharge etc. complete. |
