PROVISION OF SOIL INVESTIGATION FOR CERTAIN SANCTIONED WORK AT JHANSI

Amount

Carrying out Digital Topographic land survey with Total Electronic Station of high precision, making position of each physical feature on the ground true to their position like building, sewer lines/storm water drains, manholes and sump wells, water bodies, large size rocks, GI & CI lines, fully grown trees having girth more than 30 cm, overhead HT/LT electric lines, transformers, substation, OHT, Tube wells, electric & Telephone cables and poles, roads, paths, existing permanent/ temporary structures, fencing boundary walls/lines gates, drain etc i.e. height of inaccessible structure like HT lines,OHT etc., Preparing the contour plan of suitable contour intervals depending upon the topography of the terrain & preparing drawing in A-1 size, recording reduced levels of points of abrupt changes at suitable intervals, fixing temporary Bench Marks (TBM) and marking them on ground with paint as required, calculation of area and other details of surveyed pockets with submission of three Nos coloured drawing along with one soft copy on compact disk (CD) to the 1: 1000 or suitable scale & plotting on Auto CAD .Area 40 acre

Conducting soil Investigation (bore hole) as per IS : 1892-1997 in the proposed site by means of manual/ hydraulic/ calax rotary drilling of 150mm diameter in any type of soil/rock with casing pipe/ bentonite slurry if required, for supporting inner collapsible stratum below water table with pot holes/ helical auger in all sorts of soil up to 10.00 Mtr depth of bore hole or up to the depth of refusal (N>50) for the proposed site and allied infra and preparation of investigation report with proper recommendation of type of foundation to be adopted including safe load bearing capacity of soil. Including bush cutting at site of work including approach route for feasibility of mobilization to tools & plants and personnel to the site and demobilization after completion of work and Trial pit also as required at site and as directed by Engineer-in-Charge Notes:- (i) Proposed Bldgs : As per calculation of bore holes details shall be as per Appx attached with tender document (tentative). (ii) Location of bore holes as per site plan etails shall be as per Appx attached with tender document (tentative). (iii) Location may be changed on ground requirement basis or as per direction of Stn /MES auth. (iv) The succesful tenderer shall arrange to submit photographs and videography record showing various tests and all important stage performed at site and in lab of each bore hole or as decided by Engineer-in-charge. If the photographs/videographs record as listed above are not submitted, then recovery for the same be made from the contractor's RAR/final bill. (iv) Sequence and extent of each soil and rock stratum in the region likely to be affected by the proposed work shall be enumerated in detailed report including nature of each stratum and engineering properties of soil and rock which may affect design and mode of construction of proposed structure and their foundation. (v) Photographic record of Geo-exploration as well as testing shall form part of detailed report to be submitted. (vi) Collection of disturbed/undisturbed sample as per IS-2132-1986 and carrying out laboratory test for the following :-

(a) Sieve analysis (b) Consolidation characteristics (c) Particle size (d) Wet and dry density (e) Specific gravity, 'C' value, moisture content etc (f) Plasticity index (g) Natural moisture content (h) Shear strength characteristics (j) Swelling pressure and free swell index for clayey soils. (k) Evaluation of safe bearing capacity based on shear failure and settlement failure criteria. Refer IS 1904-1986. IS 8009 Part 1 & 2. Allowable bearing capacity at various depths of 1.0m, 1.5m, 2.0m, 2.5m, 3.0m, 3.5m and 4m or more as required below GL is to be given with suggestion for economical width and type of foundation to be adopted. Recommended SBC shall be given for all bore holes. SBC should be worked out for following isolated footing of size 1.0m x 1.0m, 1.5m x 1.5m, 1.5m x 2.5m, 2.0m x 2.5m, 2.0m x 3.0m and 2.5m x 3.0m at each depth specified for working out SBC. (l) Carrying out swelling test soil. (m) Location of Ground water table (GWT) at peak dry and peak monsoon period be submitted in report. (n) Recommendations as regards possibility of liquefaction of soil be given. (o) Recommendation for suitability of earth obtained from foundation trenches for back filling and filling under floor shall also be given. (p) Possible corrosive effects of soil and water on foundation material. NOTE:- (Applicable for the BOQ the entire scope of structure / Bldgs in catered): Records of Boreholes and Trial Pits shall be made in a plan and section, drawn to the largest convenient scale should be submitted. The following information should be shown in plan (a) Name of Agency (b) Location with existing reference (c) Boreholes and Trial Pits with number and location marked on site plan with co-ordinates ie., lateral and longitudinal measurements. (d) Reduced level (RL) of ground surface with reference to BM at each BH and Trial Pits. (e) Date of explorations/ site investigation started and date of completion. (f) Name of supervisory staff of GE JHANSI.

Soil investigation for making trial pit of size 3m x 3mx 3m to study and collection of samples to make the composition of soil,structure of sub surfaces and water table of the site. Making of trial pit including the excavation, removal of soil from trenches to a distance not exceeding 50m and returning, filling in the soil in the trail pit to be completed and make the trial pit top surface to match with the existing ground level complete all as specified and directed

Making necessary arrangements for mobilisation and fixing of equipments, tools & plant required for soil investigation and their removal after completion of work.

Shifting the entire arrangement from one bore hole to another bore hole location and setting of boring/drilling rig as required and as directed by Engr-in-Charge..

Boring 100mm dia bore holes to any depth through following type of strata:-

Any type of soil

Soft rock

Hard rock

Collection of undisturbed soild sample at 3M intervals or at any change of strata in 100mm bore thin walled tube including waxing, sealing, packing, transporting to the lab.

Carrying out standard penetration test (SPT) including collection of disturbed soild samples in bore holes at every 3M depth or any change of strata and submit the report with all requisite date.

Conducting necessary test on all collected DS/UDS/SPT samples of which includes the determination of :-

Atterberg limits

Natural moisture content

Wet and dry density

Soil / particle size using sieve hydrometer analysis

Tri-axial sheer test , direct shear test

Shrinkage limit

Consolidation test

Specific gravity test for sand /rock

Crushing strength of rock samples

Permeability test

Testing of water sample (02 samples)

Free soil index

Chemical composition/salt content

Ground water table

Preparation and submission of report in 04 copies containing NSBC, SBC, settlement test results, graphs, charts, calculation etc and recommendation for foundation. Settlement criteria of soil to be considered

Topographical survey of projected land including the following parameters:- (a) Contour surveying using electric total station including traversing , picking up details of existing features like drain, road, culverts, foot path etc locating co-ordinates of strategic points including levels at suitable intervals to obtain the ground undulations precisely as per terrain and site conditions. Mark the line plan of proper drainage system with in and out (b) Transfering the feild data to computer and plotting the details and preparing contour at 3mtr intervals( or other suitable interval as directed by engr in charge) using appropriate computer software (c) Plotting the drawing to convert scale and furnishing 4(four)sets of Auto CAD drawing/Contour maps (d)The peripheral measurement of the road shall be precisely and predominantly earmarked in the contour map (e) Necessary bench marks shall be established at prominent positions (f)Clearing of jungle/bush which creates hinderance to the survey of the area (g) The survey shall be conducted at 3m X 3m grid intervals

VIJAY BUILDERS

N K ENTERPRISES

UNIVERSAL ENGG CO

Shri Balaji Associates

Dubey Construction Company

Soni Traders

M/S Chadha Brothers

Dhruv Enterprises