NPCIL/HQ/CMM-WG/92/2024/LT/174

Amount

Rotary boring/drilling of ‘SX’ size holes vertically to log and collect samples through all kinds of soils and weathered rock with adequate and suitable equipment for all depths as drawings and as directed by the Engineer-in-Charge. Note: The quoted rate shall include the following: 1. Mobilization and demobilization of adequate numbers of suitable boring and drilling rigs of hydraulic type, including necessary drilling rods, pumps, miscellaneous equipment, tools, spares, consumables etc. adequate for each set of plant, survey equipment, etc. Additional rigs and equipment shall be mobilized by contractor, if needed, for timely completion of the work at his own cost. 2. Deployment of technical, skilled, semi skilled & unskilled man power required for carrying out the complete work as per specifications & drawings. 3. Providing suitable temporary removable casing for ensuring stability of boreholes in soil/ weathered rock. 4. Measurement of ground water level.. 5. Preparation and Maintenance of drilling records, field core logs and submission of final geological logs in hardcopy as well as soft copy. 6. Conducting Standard Penetration Test (SPT) in the bore holes in soil @ every 1.5m depth or as specified in the drawings. 7. Collection of soil/weathered rock samples at the depth and in quantity as specified in the drawing and as directed by EIC, maintaining records of each, transporting the sealed and preserved in original condition to the approved NABL laboratory or applicable IS Code for the tests mentioned under relevant items. 8. Grouting of holes with cement mortar 1:2 (weight batches)

Same as above item i.e. 1 but with NX size holes in rock formations (excluding carrying out SPT) including collection, numeration and logging of cores, supply of core boxes boxes made of seasoned timber or any other durable material as per IS: 4078 for storing core samples, painting, labelling of boxes, putting core samples in the boxes, labelling of cores samples, colour photographs (100mm x 150 mm) of boxes with core samples placed inside the boxes and transporting and storing in core samples library at location indicated by Engineer-in-Charge, measurement of ground water level etc. complete as per drawings.

NX driling From >20 M below GL to 40 M below GL

NX driling From >40 M below GL to 60 M below GL

NX driling From >60 M below GL to 80 M below GL

NX driling From >80 M below GL to 100 M below GL

NX driling From >100 M below GL to last drilling depths below GL

Providing GI Core boxes as per IS 4078 to include 6 m cores and as per EIC intructions.

Locating bore hole, shifting & Setting up of drilling equipment at each of the drill locations including following activities: 1. Conducting survey and locating the borehole as per the drawing or as directed by engineer in charge by using total station with all accessories. The location of the borehole to be identified based on the coordinates provided in the drawing by transferring the coordinates from the marked up points given in the drawing/ shown by Engineer along with grid / bench mark. The distance of survey traverse will not be more than 2 KM. Use of GPS instruments for locating bore holes will not be acceptable, however it may be used as a confirmatory system only. 2. Making temporary access roads as required to the boring/ drilling locations from existing approach roads to site. 3. Arranging water supply for the drilling and testing. 4. This item shall be operated only once for each bore hole. Any replacement or change of equipment needed due to any reasons, contractor shall carry out at his own cost. 5. Required Site clearance, earthwork etc. suiting for mounting of the equipment and creating working environment. 6. No extra payment shall be made for any criss-cross or back and forth movement of the rig after setting, required for proper positioning, including marking the drill hole location on ground by actual survey, as per the drawing or instructions of the Engineer in charge.

Dry/Bulk density and specific gravity as specified in the drawing and IS codes and as directed by the EIC

Uniaxial compression test to determine un-confined compressive strength along with Young's Modulus E and Poisson's ratio as per field conditions and as instrcuted by EIC.

Tensile test by Brazilian method as per IS 10082 and as instrcuted by EIC.

Tensile test by Point load method as per IS 8764 as per field conditions and as instrcuted by EIC.

Triaxial Tests , Without saturation and as instrcuted by EIC and IS codes. Note: 3 samples tetsted at different cell pressure consitute 1 set

Triaxial Tests , Without saturation and as instrcuted by EIC and IS codes. Note: 3 samples tetsted at different cell pressure consitute 1 set

Determination of Water absorption and Porosity as per relevant IS Code and as instructed By EIC.

Detailed Petrographic examination of core including grinding thin sections for study under electronic microscope, taking photo (micro-graphs) of sections and assessment of strained quartz etc complete for including in the report and submission of report and as per EIC instructions.

CEG Test House And Research Centre Pvt. Ltd. (BID ID -757253)

Cengrs Geotechnica Pvt. Ltd. (BID ID -757368)

Renuka Consultants (BID ID -756986)