GAIL India Limited Tender

By Boring of minimum 150 mm dia boreholes as specified in specific requirement through all kinds of soil excluding hard rock

On River/ Water Bodies Bank

On River/ Water Bodies Bank, by sides of Roads, Railways etc.

In River / Water Bodies Bed

In River / Water Bodies Bed including making necessary arrangement for supplying floating plate form, boring / drilling/ other associated equipment & shifting etc all complete. Note: Measurement should be for actual depth from bed level.

Drilling through rock/boulder strata

Drilling through rock/boulder strata (Considered when Rock quality designation (RQD) is min 25%) with minimum Nx size bit as per instruction of Engineer-in-charge.

On River/ Water Bodies Bank

On River/ Water Bodies Bank, by sides of Roads, Railways etc.

In River / Water Bodies Bed

In River / Water Bodies Bed including making necessary arrangement for supplying floating plate form, boring / drilling/ other associated equipment & shifting etc all complete. Note: Measurement should be for actual depth from bed level.

Field Investigations

Conducting Standard Penetration Tests

Conducting Standard Penetration Tests in Boreholes as specified.

Collecting 100 mm dia undisturbed sample

Collecting 100 mm dia undisturbed sample form boreholes as specified.

Collecting Disturbed samples from Bore Holes

Collecting Disturbed samples from Bore Holes

Conducting the following laboratory tests

Conducting the following laboratory tests in NABL or equivalent accredated labarotary as per ISO/IEC 17025

Atterberg's Limit

Atterberg's Limit (Liquid Limit & Plastic Limit)

Natural Moisture Content

Bulk and Dry Density

Specific gravity and Void ratio

Ground Water level

Grain Size Analysis and IS Classification

Shear Strength Parameters

Shear Strength Parameters (Cohesion and Friction Angle)

Chemical Analysis of Soil

Laboratory test on rock sample

Laboratory test on rock sample as specified/ as decided by EIC

Core Recovery (RQD)

Mohr's Scale of Hardness

Point Load Test

Unconfined Compressive Strength

HYDROGRAPHICAL & HYDROLOGICAL SURVEY

HYDROGRAPHICAL/TOPOGRAPHICAL & HYDROLOGICAL SURVEY: Conducting Topographic / Hydrographic survey for 50 meters on either sides of proposed pipeline alignment and dry bed shall be surveyed upto widths as mentioned below (refer note:1) and spot levels shall be taken at grids at 5m interval, as well as providing all men, tools, tackles, materials, survey boats, echo-sounder, drilling rigs, soil testing equipment, other equipment, other support facilities (including mobilization and demobilization and relocation of equipments, necessary plant and personnel at the sites on land and in water) necessary for the survey including collection of Historical / Hydrological data such as maximum velocity & discharge at HFL, scour bed level, width of water body at HFL ,other hydrological data and other river details such as meandering and river bed profile, existence of any bridge, hydraulic structure or reservoir within 10 Km U/S and D/S of the crossings for each river crossing site from the local / regional agencies such as CWC, Deptt of irrigation, Flood control Authority, PWD etc. and associated work and submitting Draft and Final Survey Report, Drawings, Maps, Data etc. (One Lot) in an approved format with full scale for Hydrological and Hydrographical Survey, Scour Depth, Stability of Bank Slopes, Analysis of pipeline depth and buoyancy calculations, Proposal for anti-buoyancy measures, Scour profile of the riverbed along the pipeline crossing along with scour calculations etc.,Technical Specification, in accordance with the implementation schedule and instructions of the Engineer-in-charge.The data shall be maximum of the recorded data in the last 25 years complete as listed in details in scope of work. All works completed in all respect. Note: i) The banks on either side shall be surveyed up to 600 meters for Yamuna River as per requirement. ii) Scour Calculation shall be in this scope. iii) A consolidated report in three sets with final drawings/data/documents (Paper copies in Colour) and soft copy (both pdf and editable copies) shall be submitted.

Hydrographical/Topographical & Hydrological Survey report

Yamuna River, (Bank to Bank width 350 m approx.)