SOIL INVESTIGATION OF RUNWAY AND ASSOCIATED AIRCRAFT OPERATING AREAS AT AF STATION SRINAGAR

Amount

Determining SBC of soil for Runway alignment by performing standard penetration test as per IS 2131 by boring/drilling 100mm dia bore hole upto 03 metre depth from NGL or refusal along with SPT at every change in stratum or at depth of 0.5m, 1.0m, 1.5mtr, 2mtr, 2.5m, 3.0 mtr from NGL all as per IS 2131-1981 (reaffirmed 1997). Arrangement for driling/boring must be catered for by agency and open pits will not be allowed. Carrying out SPT with special attention to following clasues of the IS: (a) Eqpt used shall provide a clean bore hole, 100 mm in dia to ensure that the penetration test is performed on undisturbed soil and shall permit driving of split spoon sampler to obtain penetration record alongwith samples as specified in IS code procedure. (b) While driving casing. it shall not be driven below the level at which the test is to be carried out or from where the sample is to be taken (c) in case wash boring is adapted for cleaning of the borehole, only side-discharge bits are permitted; a bottom discharge bit is not permitted while boring through soils which may get disturbed by flow of water while boring above water table level. (d) Collection of undisturbed sample at every 1m depth interval as well as at any change of strata, including waxing, sealing, packing, transporting to the lab.

(e) Conducting necessary tests mentined below which includes the Soil Bearing Capacity (SBC) :- (i) Atterberg's limits (IS 2720 part-5)(ii) Wet and Dry Density(iii) Soil Particle Size Distribution using sieve analysis/Hydrometer analysis(iv) Tri-axial shear test C-determination(v) Shrinkage test(vi) Consolidation test (vii) Specific Gravity test (viii) Crushing strength of Rocks samples (ix) Permeability test(x) Chemical analysis of ground water sample(Min 2 samples)(xi) Free swell index(xii) Chemical analysis of soil(xiii) Natural Moisture Content (f) Compilation of data and submission of report (as per NBC 2016, part 6, section 2, para 3.5) containing Scope of investigation, method of drilling bore holes, sampling from bore hole, visual description of soil sample, ground levels along with ground water table levels, test results (both laboratory and field) including graphs, photographs of equipment including drilling/boring rigs and samples collected photos, section profile of sub strata, analysis of field and lab investigation results.

Determining SBC of soil for Blast Pen construction site by performing standard penetration test as per IS 2131 by boring 100mm dia bore hole upto 10 metre depth from NGL or refusal along with SPT at every change in stratum or at depth of 1.5mtr, 2mtr, 3.5mtr from NGL and thereafter at an intervals of not more than 1.50mtr depth whichever is earlier all as per IS 2131-1981 (reaffirmed 1997). In case of gravely or boulder strata an open pit upto 3.00 metre depth alongwith dynamic cone penetration test as per IS-4968 upto 10 Metre or upto refusal whichever is earlier, collection of soil samples(distrubed or undistrubed), computation of bearing capacity complete with lab analysis as per relevent IS codes such as :- (a) Atterberg's limits (IS 2720 part-5) (b) Wet and Dry Density (c) Soil Particle Size Distribution using sieve analysis/Hydrometer analysis (d) Tri-axial shear test C-determination (e) Shrinkage test (f) Consolidation test (g) Specific Gravity test (h) Crushing strength of Rocks samples (j) Permeability test (k) Chemical analysis of ground water sample(Min 2 samples)

(l) Free soil index (m) Chemical analysis of soil (n) Natural Moisture Content Note for Soil testing at Blast Pen site:- (i) Furnishing SBC report in pentuplicate including recording SBC for each location for the type of foundation and maintaining photograpghic record (Min three photograpghs per hole duly annoted as approved by Engr-in-Charge.) (ii) Rate including all items of works necessary for carrying out complete soil exploration work, collection of sample testing at laboratoty and field test result and submission of reports (five sets). (iii) Rate includes for submission of detailed recommendation for shallow foundation and bearing capacity of soil (SBC) at 1.5/2.0/3.0 M depth, Type of foundation and depths of footing be clearly specified. (iv) In case, very weak soil strata is encountered, recommendation about pile foundation i.e. Type , Dia, depth of pile, safe load carrying capacity and socketing of pile into hard rock shall be clearly given in the report. Also measures for ground improvement if required be included in the report. Safe bearing capacity shall be worked out based on N value shear failure and settelement criteria.

Determination of CBR value of subgrade at approximately 1 m depth below NGL as per IS 2720 Part-16: 1987

Determination of Modulus of Subgrade Reaction (K Value in kg per sq.cm. per cm) of subgrade at approximately 1m depth below NGL as per IS code 9214 (1979).

GEO MEDIA ENGINEERING and CONSULTANCY SERVICES PRIVATE LIMITED

Soigne Engineering Consultants

M/S INTEL GEOCON ENGINEERING CONSULTANTS CONSTRUCTION

M/S MARSHAL TRADERS

M/S WANI AND SONS

MOUNT GEO TECHNICAL SERVICES

SPACE ENGINEERS CONSORTIUM PRIVATE LIMITED

M/S NEW FAROOQ TRADERS