| 1 | 1 | SUBSOIL INVESTIGATION | BI01010001010000000000000515BI0100001112 | | |
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| 2 | 1.01 | A) SUB SURFACE EXPLORATIONS | | | |
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| 3 | 1.02 | Note: Contractors will have to submit proof of sufficient technical competence of agency undertaking items below. The contractors will not be entitled to additional reimbursement for employing alternative agency, if Engineer in-charge so desires. | | | |
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| 4 | 1.03 | Providing and transporting necessary and adequate plant and equipment to site with in a lead of 50 km for taking trial bores for subsoil investigations including installation of the drilling equipment of the first bore location. | | 1 | Each unit |
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| 5 | 1.04 | Shifting and locating the drilling equipment from one location to another within a lead of 500 m between successive locations | | 1 | Each Shift |
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| 6 | 1.05 | Taking trial bores upto 150 mm dia. for subsoil investigation through overburden and soil of all sorts including providing of temporary casing and cleaning the bottom of holes before conducting field tests or collecting samples at various depths. | | | |
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| 7 | 1.06 | Depth upto 6.0 m below ground surface | | 1 | RMT |
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| 8 | 1.07 | Depth beyond 6.0 m upto 20.0 m below ground \nsurface\n | | 1 | RMT |
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| 9 | 1.08 | Taking trial bores for subsoil investigation through rock using rotary drilling equipment with NX size diamond core drilling bits and double tube core barrel to obtain approximately 54 mm dia. rock cores including provision of wooden boxes for storage of cores, indexing the core samples at site of work. | | | |
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| 10 | 1.09 | Depth upto 10.0 m below ground surface | | 1 | RMT |
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| 11 | 1.1 | Depth beyond 10.0 m upto 20.00 m below ground surface | | 1 | RMT |
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| 12 | 1.11 | Depth beyond 20mtr. | | 1 | RMT |
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| 13 | 1.12 | Conducting Standard penetration test as per specifications in soil at various levels of bore holes and reporting the results. | | 1 | Nos. |
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| 14 | 1.13 | Collecting disturbed samples of soil from bore holes as per specifications\nand delivering the same to the testing laboratory.\n | | | |
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| 15 | 1.14 | In M.S. Black tube 50 mm dia 150 mm. long including the cost of tube | | 1 | Nos. |
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| 16 | 1.15 | In polythene bags by driving 100 mm size tube. | | 1 | Nos. |
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| 17 | 1.16 | Collecting undisturbed samples of soil as per specifications at any depth in M.S. black tube 100 mm dia. 450 mm long, sealed at both ends with paraffin wax and delivering the same to the testing laboratory. | | 1 | Nos. |
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| 18 | 1.17 | Collecting soil samples and sub-soil water samples in glass or plastic bottles / jars from trial bore holes and getting the same chemically analyzed in an approved laboratory for determination of sulphate and\nChloride contents and pH value etc.\n | | 1 | NO |
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| 19 | 1.18 | Carrying out Plate Load Test complete with necessary and adequate Kentledge loads, equipments and instruments etc. as per specifications for determination of bearing capacity of soil etc. complete as specified and directed and submitting reports in duplicate. | | 1 | NO |
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| 20 | 1.19 | (B) SURFACE EXPLORATIONS | | | |
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| 21 | 1.2 | Taking trial pit in soil of all sorts excluding rock collecting disturbed & undisturbed samples at 1 m intervals and trial depth, collecting water samples & transporting all soil & water sample to lab., visual inspection for description of strata / recording water table encountered, dewatering manually and refilling at end etc. complete as specified and directed. | | | |
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| 22 | 1.21 | a) Upto 2 mt. depth | | 1 | CUM |
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| 23 | 1.22 | b) 2 m to 4 m depth | | 1 | CUM |
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| 24 | 1.23 | c) 4 m to 6 m depth | | 1 | CUM |
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| 25 | 1.24 | (C) LABORATORY TESTING | | | |
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| 26 | 1.25 | Carrying out tests as per specifications for determination of: | | | |
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| 27 | 1.26 | i) Natural moisture Content (NMC) of soil by Oven Drying method | | 1 | NO |
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| 28 | 1.27 | ii) Atterberg limits | | 1 | NO |
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| 29 | 1.28 | a) Liquid limit | | 1 | NO |
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| 30 | 1.29 | b) Plastic limit | | 1 | NO |
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| 31 | 1.3 | c) Shrinkage limit | | 1 | NO |
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| 32 | 1.31 | iii) Grain size analysis including grain size distribution curves in accordance with IS 2720 (part 4) | | | |
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| 33 | 1.32 | a) Sieve Analysis | | 1 | No. |
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| 34 | 1.33 | b) Hydrometer Analysis | | 1 | No. |
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| 35 | 1.34 | iv) In-situ density of soil samples | | 1 | NO |
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| 36 | 1.35 | v) Specific gravity | | 1 | NO |
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| 37 | 1.36 | vi) Unconfined compressive strength of rock samples, including determination of percentage of water absorption and density. | | 1 | NO |
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| 38 | 1.37 | Conducting Consolidation test on undisturbed soil sample or soil sample compacted to specified density in accordance with IS 2720 ( part-15), reporting results including unit weights, specific gravity, e-log p curve,\nvirgin curve, PO, eo, Cc, Cv and mv for all pressure increments.\n | | 1 | NO |
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| 39 | 1.38 | Conducting Unconfined compression test on undisturbed soil samples or soil samples compacted to specified density in accordance with IS : 2720 (part 10) and reporting results. | | 1 | NO |
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| 40 | 1.39 | (D) REPORT PREPARATION | | | |
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| 41 | 1.4 | Preparing and submitting reports and drawings in triplicate | | 1 | EACH |
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