Job Works of Soil Investigation for Construction of two single entry ORP blast pens at runway ends along with associated works services at AF Station Bkt.

Amount

Conducting soil investigation test at site as per relevant specification of IS-2131, IS-6403, IS-1498 & IS-2720/ latest relavant IS and submit the report as per following :- Drilling of 150 mm diameter bore hole in all types of soils as per depth indicated below or refusal strata which ever is earlier as per instruction of the Eng-in-charge. Refusal defined as and when 'N' value is 100 or more for 30 cm or part penetration. (a) Conducting standard penetration test (SPT) in the bore holes at 1.00 m intervals in depth or every change of strata which ever is earlier as per IS:2131-1981 or Conducting Dynamic cone penetration test (DCPT) in the bore holes at 1.00 m intervals in depth or every change of strata which ever is earlier as per IS:10042-1981 (Applicable for gravel, boulder deposit type of soil) and provide Bore Hole Log, Depth of water table, Swelling Index, expansive soil present or not, and SBC. (BP-06, Travese wall-4, Parking shed-01, SWT-01 (i) Total No. of bore holes = 12Nos (ii) Depth of bore hole = 6Mtrs

(b) All as per Item 1 (A) (a) above but 15 mtr deep. ( No of bore hole = 3 Nos in UG Annexe)

Conducting SPT upto 3 mtr depth at 1.00 m intervals or change of strata whichever occurs earlier. as per relevant specification of IS-2131, IS-6403, IS-1498 & IS-2720/ latest relavant IS .

Determination of K value as per IS: 9214: 1979-1/ latest relevant IS Note:- Submission of six copies of ink signed test reports. The report should include the following :- (i) Detailed description of field investigation, soil classification and general nature of soil strata, water table, interpretation of test results, grain size distribution curves, swelling index compressive index curves, site plan etc, stress-strain modulus (by stress-strain curves from triaxial tests), foundation analysis & recommendations with supporting calculations regarding foundation system, depth of foundation. (ii) The SBC of the soil is required to be given as per following table, calculation of bearing capacity will be governed generally as per IS:8009 Part-1-1976, IS:2720 Part-2-1980, IS:6403-1980, IS:1904-1986 & IS:1080-1985 and other relevant IS codes and detailed calculations duly showing the various soil parameters/indices shall be given in the soil report - (iii) Plotting of a compiled sub-surface profile along the depth in both plan directions (iv) Estimation of safe side slopes for excavation (v) Suitability of excavated material as back fill (vi) To check for liquefaction potential (vii) Any other pertinent information relating to foundation design considered necessary (viii) Soil investigation report shall include a detailed site plan showing the approx location of each bore duly numbered as per log of bore hole should be enclosed. Location of foundation of adjacent structures, especially those that might be impacted by the porposed construction should be indicated with details in site plan. (ix) Photographic record of geo-explorations as well as testing shall also form part of the report (x) Every page of the Soil Investigation Report should have the Name of the Job for which Soil Investigation is being carried out. In case of multiple sites of a single Job are being investigated name of each site shall be put on each page of report pertaining to the site. (xi) All pages of the Soil Investigation Report shall be serially numbered, stamped and signed by the Agency carrying out the soil investigation. Report should be scrutinized by GE & CWE for correctness & endorsed. (xii) The GE shall intimate the approximate type of construction, utilization and dimensions of proposed bldgs to the consultant, who based on geotechnical investigation, should recommend type of foundation (viz isolated/combined footing, raft, pile etc) (xiii) In case of underground building basement construction, or if requirement of temporary/permanent deep excavation support measures during construction of building are envisaged necessary excavation support measures to be given by the consultant based on geotechnical investigations.

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