Provision of Soil Investigation and Other Consultancy Work at Naval Station Bheemunipatnam

M & L for Site clearance by clearing away all Shrubs, Vegetation, Grass, Bushes, Weed, Trees and Saplings not exceeding 30 cm in girth, measured at a height of one meter above ground level, Grubbing up tree trunk by digging out roots up to 60 cm below ground level including cutting of trunk portion protruding over ground, removal of stumps, digging out roots, filling holes and levelling off ground, filled up with earth, well rammed and levelled, removing boulders if any which interfere with the work, after breaking down if necessary including stacking of serviceable material and removing of unserviceable material to a distance not exceeding 50m / outside the periphery of the area under clearance and burnt or otherwise disposed of as directed in low laying areas outside the MD Land complete all as specified and as directed.

M & L for Drilling Boreholes of 150mm dia in Any Type of Soil but excluding Any Type of Rock up to Rock Strata for Main Building and up to a minimum of 15.00 Metres in case of Other Structures including conducting following activities: [a] Conduct of SPT at every 1.5 m Interval or Change of Strata whichever occurs earlier. [b] Collection of Undisturbed Soil Sample [UDS] at every 1.5 m Interval or Change of Strata whichever occurs earlier. A minimum Gap of 500mm shall be ensured between SPT and collection of UDS. Tentative Borehole depths in Soil Strata for Main Buildings [2 Blocks] shall be 10 X 24.00 = 240.00 RM, for Pump House shall be 1 X 15.00 = 15.00 RM and for UG Sump of 1.75 Lakhs & 1.50 Lakhs Litres Capacity shall be 1 X 15.00 = 15.00 RM [Total Quantity: 270.00 RM]. The depth specified is for rough guidance only.

M & L for Drilling Boreholes in Any Type of Rock [Soft/Hard] using Hydraulic Drilling Machine within the Borehole for Cutting Cores in Rock and Collection of Cores of requisite Size and Length as per relevant Indian Standards, Logging Core Recovery, Drilling shall continue till minimum 5.00m into Hard Rock Strata and Conducting following Laboratory Tests on Rock Sample / Cores collected from Boreholes as per Relevant Indian Standards i.e. IS – 2720 [ All Parts], IS – 1498, IS – 9143, IS – 13030, IS – 9221, IS – 8764, IS – 9179, IS – 10050, IS – 10082, IS – 10782, IS – 12608, IS – 13047 & IS – 3025] complete all as specified and as directed: [a] Visual Classification [b] Density [c] Specific Gravity [d] Hardness [e] Slake Durability / Degree of Weathering [f] Uniaxial Compression Test [ Crushing Strength] [ Both Saturated and Unsaturated] [g] Point Load Strength Index. [h] RQD [ Rock Quality Designation] Note: The Boring / Drilling shall be executed invariably in all Bore Holes of Main Building for a depth of 5.00 Metres. In case of encountering Rock Strata at deeper depth i.e. beyond 24.00 Metres, the Boring / Drilling shall be carried out for at least in 3 Boreholes spread uniformly in the Building Area. Tentative Depth of Rock Drilling in Main Building shall be 10.0 X 5.0 = 50.00 RM, Pump House Building shall be 1.0 X 5.0 = 5.00 RM and for Sumps – 2 Nos shall be1.0 X 5.0= 5.00 RM [Total Depth = 60.00 RM]. The depth specified is for rough guidance only.

M & L for Conduct of following Laboratory Tests as per Relevant Indian Standards [See IS – 2720 [All Parts], IS – 1498 and IS – 3025] on Soil Samples Collected complete all as specified and as directed: [a] Test on Disturbed / Undisturbed Soil Samples: [i] Visual and Engineering Classification. [ii] Sieve Analysis and Hydrometer Analysis. [iii] Atterberg Limits [Liquid Limit, Plastic Limit and Shrinkage Limit]. [iv] Specific Gravity. [v] Free Swell Index. [b] Test as on Undisturbed Soil Samples. [i] Bulk Density and Moisture Content. [ii] Unconfined Compression Test [On Remoulded Undisturbed Sample]. [iii] Swelling Pressure [On Undisturbed & Remoulded Sample] [iv] Determination of C & Ǿ Values Using Direct Shear [Drained / Undrained] [On Remoulded or Undisturbed Sample] or Triaxial Compression Tests [On Undisturbed or Remoulded Sample] or Vane Shear Test. Note: The rate quoted shall be deemed for a Borehole of depth 24.00 Metres in Soils. If any variation in depth is found both Plus or Minus, the same shall be adjusted at proportional rate.

M & L for Chemical Analysis of Ground Water Sample collected at bottom of One Bore Hole complete all as specified and as directed.

M & L for Chemical Analysis of Soil Samples One Each from Each Strata in respect of One Bore Hole complete all as specified and as directed. If different Strata[s] encountered in any of the Borehole, additional Soil Samples shall be analysed. On completion of the On-site and Laboratory Tests, Subsurface Investigation Report shall be prepared which shall include Geological Information, procedure adopted for Investigation, Field Observations, Laboratory or Test Data, Analysis, Interpretation, Recommendations etc. Composition of Subsurface Investigation Report shall include but not limited to the following:

[a] Dimensioned Plan showing Location and Depth of In-Situ Tests, Co-Ordinates of Borehole Locations with reference to Prominent Permanent Features of the site duly signed by Engineer-in-Charge, GE & Geo Consultant. [b] Geological Information of the area. [c] General Topography of the Site, duly marking RL of the location of Boreholes with reference to RL of Nearby Permanent Features available at site duly signed by Engineer-in-Charge, GE & Geo Consultant. [d] Past usage and Historical Data of the site, if available. Information regarding Flooding of the site in the Past, High Flood Level etc. [e] Bore-Log and Trial Pit Log duly signed by Engineer-in-Charge, GE & Geo Consultant. [f] In-situ Test Results. [g] Plot of Standard Penetration Test [N Values both Uncorrected and Corrected] with Depth for Identified Areas. [h] Laboratory Test Results [j] Summary of Strata Profile

[k] In case of Pressure Meter Tests the following shall be furnished: [i] Calibration Record including, description of Membrane and Sheath on Probes, Dimension of Thick-Walled Cylinder, Length of Flexible Tubing, Calibration Curves/Chart, Temperature, etc. [ii] Drilling Record including, Borehole Number, Method of Making Borehole, Log of Soil Type and Condition, Depth of Water in Borehole, Weather and Temperature. [iii] Test Record: Type of test, Date and Time, Depth of Centre Point of Probe, Volume Readings at 30 Seconds and 60 Seconds Elapsed Time and Corresponding Pressure Readings, Notes on any Deviation from Standard Test Procedure, Field Pressure Meter, Creep and Air Calibration Curves indicating Pₒ, Pᵳ and Pl, corrected Pressure Meter and Creep Curves indicating Pₒ, Pᵳ and Pl along with Calculation for the corrections.

Reporting of In-Situ and Laboratory Test Results shall be in Accordance with Relevant Indian Standards. The Report shall include / comprise of Analysis and Interpretation of Results, Analysis of Test Results, Discussion and Interpretation of Results analysed including basis of adopting Design Parameters for the Substrata and shall also specify following details: [i] For Shallow Foundations: Net allowable Bearing Pressure Considering Shear, Settlement Criteria as well as SPT Value for Isolated Footing, Continuous Strip Footing and Raft Foundation at depth 1.5 m, 2.0 m, 2.5 m and 3.00 m. For calculations IS – 6403 shall be used. Modulus of Subgrade Reaction and Modulus of Elasticity of Substrata. In case of UG Sumps / Swimming Pools, K Value from 0.5m to 5.0m depth. [ii] For Pile Foundations: Safe Load Carrying Capacity [Compression, Pull Out and Horizontal with Free Head as well as supported Head Pile Load Capacities shall be worked out for 300, 400, 450 & 500 for Underreamed Piles and for 450, 500, 550, 600, 700 & 750 dia for End Bearing Piles. [iii] If weak soil with lesser N value as specified in Table – 1 of IS – 1893 [Part – 1] is encountered then evaluation of liquefaction potential shall be assessed and remedial actions to be adopted shall be specified. [iv] Suitability of the soil for backfilling around foundations / filling under floors. [v] Susceptibility of Sub-Soil Strata to Liquefaction, if any, in the event of Dynamic Loading and required Remedial Measures. [vi] Remedial Measures against the Presence of Harmful Chemicals in the Sub-Soil / Ground Water. [vii] Remedial Measures for Foundation Footings, Plinth Beams and Filling Under Floors in case of meeting Expansive Soils.

The contractor shall submit Videographic and Photographic Record [03 Copies] along with 6 Sets of Hard Copies and 6 Sets of Soft Copies duly signed including Soil Investigation Report for visual description of Soil Samples and Traverse Section Profiles of Substrata before claiming payment.