CONSTRUCTION OF DAMAGED COMPOUND WALL IN NSTI GUINDY CHENNAI SH CARRYING OUT PRECONSTRUCTION ACTIVITIES SUCH AS DIGITAL TOPOGRAPHICAL SURVEY AND CONDUCTING GEOTECHNICAL SOIL INVESTIGATION

Carrying out the Digital Topographical survey of entire land of NSTI (CTI/ATI) main campus, with electronic surveying device such as Total station traverse to locate the boundary and other existing features in the plot / campus. The survey work should include contour mapping indicating the levels at fixed intervals not more than 5m also indicating the existing main road level adjacent to the property and marking of existing structures / buildings with their outer dimensions, fully grown trees (indicating its spices), Electrical poles, Well, Bore well, Parking, Landscaping, Sewer lines with Manhole / chambers, internal roads / pathways , Strorm water drains including width etc and preparation of surveyed site plan in digital (.dwg & .pdf) format as well submitting the same along with required number of hard copies in Colour print out (10 Nos of A0 size), the plan shall be prepared in a scale not less than 1:500 etc., all complete as per the direction of the Engineer-in-Charge.

Conducting Geotechnical soil investigation such as Standard Penetration Test as per IS:2131-1981 (R-2002) including mobilization of required Tools, Plants, Equipments, Conducting Geotechnical soil investigation such as Standard Penetration Test as per IS:2131-1981 (R-2002) including mobilization of required Tools, Plants, Equipments, Labour and materials for carrying out the investigation with boring of 150 mm dia. bore holes up to a depth of not less than 10m or rock stratum or up to refusal strata (The refusal strata shall be considered for field N values more than 100) whichever is higher, using shell & Augur/ Drilling machine in all kinds of soils, including taking the disturbed samples along with recording SPT N values at every 1.50 m interval, taking undisturbed samples at 3.00 m intervals or at every change of strata whichever occurs earlier, determination of important Chemical properties such as SO3 content, Chloride content, Carborate content, PH etc. including soil properties (Parameters) viz. Grain size analysis, Atterberg limits (such as Liquid Limit, Plastic Limit, Plasticity Index), Bulk Density, Dry Density, Moisture Content, Specific Gravity, Void Ratio, Compression Index CC etc. on disturbed / Undisturbed soil samples, shear test, shear test on Plastic/ Semi Plastic soil and Direct Shear Test on Non Plastic Soil i.e. Cohesion (C) Angle of Friction, conducting Consolidation Test on Clayey Strata and other relevant tests on soil samples as per the relevant IS Code/ specifications, calculating net Safe/ Allowble Bearing Capacity at suitable delpth (below Ground level or below Basement Level) including the preparation and submission of detailed Soil Investigation Report in Triplicate (Hard copy) and soft copy. (Pdf format). The report should also include the position of Ground Water Table, type of rock if any met with, including its bearing capacity, filled up soil and all other valid information considered as required for structural analysis/ design of Foundation of the proposed structures. The work shall be carried out as per the directions of Engineer-In- Charge. (The cost shall include demobilising the plant and machinerieds used and also clearing the waste materials obtained during exploration from the site ect.,).

Carrying out the Drilling operations to advance 150 mm diameter bore hole, collecting undisturbed soil samples from soft to sift clay (2<SPT<15) and conducting standard penetration Test at relevant intervals and as per the Direction of Engineer-in-Charge.. From 10 m to 20 m depth (1.5m).

Drilling in weathered rock/ refusal strata SPT>100 as per relevant IS codes and as per the direction of Engineer-in-charge.