CONSULTANCY SERVICES TOPOGRAPHICAL SURVEY AND SOIL INVESTIGATION FOR PROVISION OF SNOW AND AVALANCHES STUDY CENTRE AT FIELD STATION, DHUNDI (HIMACHAL PRADESH)

The survey works shall be carried out to facilitate comprehensive planning and design of infrastructure including buildings, internal roads, culverts, surface drainage, and overall site development. The work shall be executed using modern survey techniques to achieve high accuracy and detailed topographic information. Necessary site clearance also to be done to execute the survey work if required . 1. Topographical Survey • Conduct detailed topographic survey of the entire project area using Total Station, GPS/DGPS, and Auto Level instruments. • Mark all existing physical features such as: o Natural features: Trees, ground undulation, water bodies, low-lying areas, rock outcrops. o Man-made features: Existing buildings, roads, drains, utilities (OH/UG lines, poles, pipelines). • Preparation of contour maps at suitable intervals (preferably 0.25 m to 0.5 m) for assessing terrain profile and gradient. 2. Boundary Survey and Demarcation • Demarcate the boundary of the land parcel with reference to existing land records or revenue maps. • Fix permanent benchmarks and reference pillars using concrete/masonry pillars for future referencing. • Record the geo-coordinates (latitude, longitude, elevation) of boundary points.

3. Spot Levels and Grid Survey • Conduct grid-based spot level survey at regular intervals (typically 5m x 5m or as directed) to prepare Digital Elevation Models (DEMs) and for planning of grading and drainage. • Take additional levels at significant terrain features, depressions, high points, roads, and junctions. 4. Drainage and Natural Flow Survey • Identify natural drainage patterns, flow directions, and water stagnation areas. • Survey existing nallahs/streams and any man-made storm water systems. • Recommend invert levels and alignments for surface drains, culverts, and other storm water structures. 5. Utility Survey • Survey for all existing underground and overground utilities such as: o Electric lines and poles o Water supply pipelines o Sewage lines and manholes o Communication lines o Borewells and tanks

6. Data Processing and Drawings • Preparation of Auto CAD drawings and submission of: o Topographic survey map with contours and spot levels. o Site layout showing all features and utilities. o Road alignment drawings with L-Section & X-Sections. o Drainage and culvert layout maps. • Submission of all survey data in digital and hard copy format, including Excel sheets, drawings, and KMZ/KML files Notes: • All work shall be carried out using calibrated instruments by qualified surveyors. • Benchmarks shall be established with reference to permanent GTS Benchmarks where possible. • Survey data shall be Geo-referenced and suitable for GIS/CAD applications. • Benchmark / grid pillars of suitable type in concrete/masonry of standard size at desired locations including painting with identification marks, numbering, labeling etc. complete and as directed by Engineer-in Charge.

CONSULTANCY SERVICES

Consultancy services for detailed planning, designing and detailed engineering including preparation of Bill of Quantities (BOQ), all type of drawings (architectural, structural, MEP drawings etc) as per scope defined in tender enquiry and direction of Engineer-in-Charge. (Please refer Appendix E, F, G and H)

GEO-TECHNICAL INVESTIGATION Geo-Technical Investigations shall be carried out to assess the subsurface soil profile, bearing capacity and ground water conditions for the safe and economical design of foundations and related infrastructure components. The scope includes : (i) Soil boring using rotary/auger method at specified locations and depths. (ii) Collection of disturbed and undisturbed soil samples for laboratory testing. (iii) Standard Penetration Test (SPT) at regular intervals. (iv) Laboratory tests including grain size analysis. Atterberg limits, moisture content, density, shear strength, consolidation, and chemical analysis ) (Ph, Sulphates, chlorides). (v) Ground water table observation (vi) Preparation of Geo-Technical investigation report with soil stratification, engineering properties, bearing capacity recommendations, foundation design suggestions and excavation considerations. All work shall be carried out as per relevant IS codes and as directed by the Engineer-in-Charge.

Mobilization of tools and equipment’s from laboratory to site for conducting Geo-Technical investigation works and demobilization completely.

Drilling through all types of soil up to required depth and collecting data and samples at depth of 01m interval (for 10m depth - 03 No Bore Holes) using suitable equipment's and machinery

Boring of 100/150mm dia bore holes in all types of soil

Boring in hard rock / soft rock using TC/Diamond bit and extracting rock cores of 50mm dia

Carrying out various laboratory test of USD/SPT/DS sample at alternate depths (whichever is applicable) as per IS-1892 and 2131 at depth of 1 Mtr, 2 Mtr, 3 Mtr and 6 Mtr

Standard Penetration Test in the holes at an interval of 1 to 1.5 mtr

Sieve analysis

Atterberg limits

Field Permeability test on top soil

Water Head Pizometric test

Natural moisture content

Dry and wet density

Soaked Unconfined compression test

Percentage absorption

Mechanical analysis and moisture content

Soil Classification as per IS

Direct Shear Test

Conducting Plate Load Test as per IS:1888-1962

Electrical resistivity test for Characterization of soil, corrosion assessment and identification of depth to bedrock and other geological features

Preparation and submission of 05 copies of soil investigation reports including recommendation of type of foundation and safe bearing capacity of soil, with complete test details all as directed by Engineer-In-Charge.

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