Services

Geotechnical Investigation for Foundation Design Services

Field Explorations and Tests:

• Provide survey services for locating boreholes in the field and providing surface elevations at those locations


• Locating underground utilities at boring locations


• Furnishing all supervision, labor, drilling rigs, field equipment, tools, supplies and materials to drill boreholes.


• Provide Geotechnical representative for field supervision to monitor Work for technical compliance.


• Boring in soft medium, stiff to very stiff soil & in rock layers.


• Rotary coring method using double tube core barrels for obtaining rock cores.


• Different drilling method such as continuous flight auger, rotary drilling, wash boring & continuous coring might be used according to the subsoil strata type.


• Performing Standard Penetration Tests and obtaining samples using a split-barrel sampler


• Obtaining undisturbed samples using a tube sampler (Shelby tube).


• Labeling, boxing and transporting soil samples and rock cores to an approved storage area and/or testing laboratory.


• Installing ground water observation wells.


• Performing field permeability tests in selected ground water observation wells.


• Performing field vane shear test.


• Performing Pressure meter test.


• Performing Dynamic penetration test.


• Performing Plate load test.


• Performing field resistivity tests using (Wenner 4 pin method or equivalent) in accordance with ASTM G 57.


• Performing seismic survey as a part of Geotechnical investigation, and determining the shear wave velocities and elasto-dynamic properties of soil.

• Natural Moisture Content


• Unit Weight.


• Atterberge Limits (Liquid and Plastic Limits).


• Grain size distribution (Sieve Analysis & Hydrometer)


• Specific gravity.


• Shear Test

    (i) Unconfined Compression Test.
    (ii) Triaxial Compression Test (UU, CU & CD)
    (iii) Direct Shear Test
• Odometer Test

    (i) Consolidation Test.
    (ii) Swelling Test
    (iii) Collapse Test.
• and/or Swelling Test.


• Moisture–Density Relationship (Compaction Test)


• CBR Test


• Chemical Analysis of Soil

(i) Sulphate Content as SO3 .
(ii) Total soluble salts.
(iii) Chloride .
(iv) PH.
(v) Organic matter.

• Chemical Analysis of Water

    (i) Sulphate Content as SO4.
    (ii) Total soluble salts.
    (iii) PH.

Final Report shall include:

• Soil classifications.


• Grading curves.


• Borehole logs and SPT results.


• Geological cross-sections.


• Groundwater levels.


• Laboratory test results.


• Design soil parameters for all layers including, unit weight, moisture content, corrosion characteristics, angles of internal friction, cohesion, modulus of subgrade reaction, modulus of elasticity and compressibility characteristics


• Angles of internal friction and cohesive values.


• Coefficient of sliding – concrete to soil.


• Active, passive, and at rest soil pressure coefficients, with design recommendations for anchors/deadmen.


• Collapse or swelling properties of the soils.


• Discussion of results of investigation with relevance to foundation design and construction.


• Recommended net allowable bearing pressures and expected settlement values, based on different depths/widths of footings (including allowable increases for wind/seismic loads as applicable).


• Recommendations regarding pile lengths, capacities and types, should piling be required.


• Recommendations’ regarding ground improvements, if this is likely to be an economic option.


• Total and differential settlements under tanks of different diameters.


• Dynamic modulus of elasticity and Poisson’s ratio for vibrating equipment foundation design.


• Comments and recommendations regarding use of on-site excavated material for structural fill, including lift thicknesses, and methods of compaction.


• Availability of suitable fill material outside of site.


• Recommendations for disposal of unsuitable excavated site soil.


• Recommendations for side slopes (temporary and permanent) to bunds and embankments, cut faces, and any relevant erosion protection.


• CBR values and recommendations for road, parking area and area paving construction.


• Electrical resistivity of the soils in ohm centimeters, for calculation of resistance to soil for equipment grounding, and buried service cathodic protection.


• PH, sulphate, chloride, Gypsum, organic matter and other soil/groundwater chemicals aggressive to concrete and buried services.


• Depth of frost line and evaluation of frost susceptibility and frost heave of the soils.


• Recommendations for quality control procedures to be adopted during construction of earthworks, including BS/AASHTO tests to be used in field / laboratory, and frequency of testing.


• Likelihood of active seismic faulting, and potential seismicity in the area.


• Recommendations regarding dewatering for construction under water table level.


• Summary, conclusions and recommendations.

Surveying Services

The scope of surveying services includes:

• Topographic survey of the areas


• Establishment of benchmarks and control monuments.


• Locating major ground and site features such as overhead power / transmission lines, drainage ditches/streams, storm water gullies, roads, and any underground utilities as requested by CONTRACTOR.


• Locating the site boundary markers or evidence of markers to establish the limits of the property.


• Graphical representation, drawing and data submission via electronic format using computer aided design and drafting (AutoCAD format).

Quality Control Testing for Construction Materials

• Field density


• Concrete Core


• Asphalt Core


• Hammer test


• Load test


• Plate Bearing test


• Supplying field Laboratory

Laboratory Tests

Road Construction Material
• Sub grade


• Sub base


• Pavement

Building Construction Material

• Fine and Coarse Aggregate


• Concrete


• Tiles


• Curbstone


• Ballast


• Water