Job Order of Soil Investigation for Security Infrastructure at AF Stn Madh Island under GE AF Thane

Amount

Material and labour for carrying out soil investigation by drilling bore holes of 100mm dia in any type of soil /wherherit upto a depth not exceeding the existing ground level conducting insitu SPT taking out undisturbed samples in standard samples transportation to laboratory drilling through boulders and weathered rock formation if any etc. all inclusive. Note : (1) Boring in any type of soil be measured and paid under items no. 1. In case rock is met during the process then drilling will be measured and paid under item 2 hereunder. (a) SPT (IS 21 31:81) will be conduct at every 1.5m intervals along the boreholes. (b) The following tests shall be conducted on the disturbed and undisturbed samples (i) Natural moisture content, (ii) grain size analysis (iii) bulk and dry density (iv) liquid limit and plasticity index (v) ground water table (vi) SPT chart (vii) soil classification (viii) Direct shear tests/ unconfined compression test (as applicable for type of soil) on disturbed samples recovered from SPT test (ix) Bore logging. (c) Undisturbed samples (all as per IS-2132) of 65-70mm inner dia shall be obtained at every 2m intervals and specially in clayey strata where encountered and where change of strata is (noticed) issuing standard samples 30 to 50 cms long (area ratio not exceeding 10%) these samples shall be used for carrying out laboratory consolidation in all clayey strata there undisturbed sample shall also used for carrying out unconfined compression test (IS-2720) and consolidated trained triaxial shear strength tests. (d) Test cost of boring is deemed to include all the institutes. Sampling transportation to laboratory tests, all as specified and report submission. However consolidation core tests of undisturbed clayey soil and unconsolidated and undrained triaxial shear test report shall be measured and paid separately under item No. 3&4 of schedule "A" herein below respectively.

Material and labour for carrying out soil investigation in rock strata by rock drilling (rotary drilling ) of in hard confined and continuous rock foundation and the submission of same in properly prepared core boxes with proper identification marks all as specified.

Consolidation core tests on undisturbed clayey samples (dia of sample 65-70mm) Note : Following information shall be submitted along with the consolidation test report (a) EO long curve (b) time rate of settlement (c) CO valve (d) IO valve(s) Natural moisture content (f) insitu bulk and dry density of soil (g) liquid limit (h) plasticity index (j) permeability of soil (k) compression modulus (e) 91 interpretation of the log P curve, classification as normally consolidated/over consolidated soil, interpreted fiddle curve and estimated settlement of suggested foundation ( raft/pile)

Un consolidation and undrained triaxial shear tests on soil using the undisturbed samples (minimum dia of test samples shall be 37.5mm and obtained from undisturned samples and each test shall be based on test results of specimen from the same sample) Note for item no.5 : Following information shall be submitted with the shear test report. (a) Effective shear strength parameters ‘C’b. (b) Chemical analysis of soilc. (c) C-Q curves with mohr diagramd. (d) Natural moisture contente. (e) Index propertiesf. (f) Density of soil

Crushing strength of Hard rock samples recovered from drilling through hard rock strata all as defined under item No. 2 of Sch ‘A’ herein before.

Chemical analysis of water for ph sulphate and chloride contents.

Mobilization of tools and plant.

Preparation of report by soil consultant and submission of report in 5(Five)Nos hard copy with coloured site photographs and soft copy in 1 No CD.

Submission of bore logs samples in wooden boxes at site. Note : At every 50 m distance or where level difference of inside and outside earth is more tha 30 cm (Which ever is appicable) along the wall where new wall is going to be constructed, actual level of difference has to reported in the form of a sketch

Geo Designs n Research Pvt Ltd

Genstru Consultants Pvt Ltd