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Geotechnical Investigation Department

Service Overview

Geotechnical Investigation Department—Tohama Company

The Geotechnical Investigation Department at Tohama Company for Engineering Inspection is a specialized division dedicated to subsurface exploration, soil characterization, and geotechnical engineering analysis. Based in Basra – Al-Zubair Main Street, Tohama supports major infrastructure, oil & gas, industrial, and public works projects by providing critical data that guides safe, economical, and sustainable engineering design.

Scope of Services

Tohama offers a complete range of in-situ and laboratory geotechnical testing services, performed by qualified geotechnical engineers, field technicians, and laboratory specialists. These services ensure proper understanding of soil behavior, load-bearing capacity, and foundation suitability for various construction and infrastructure projects.

1. Soil Investigation & Sampling

  • Borehole Drilling

  • Standard Penetration Test (SPT)

  • Undisturbed and Disturbed Soil Sampling

  • Test Pits and Trial Excavations

  • Cone Penetration Test (CPT) (if required)

  • Monitoring Well Installation (for groundwater analysis)

2. Laboratory Testing

Tohama operates a fully equipped geotechnical laboratory to perform tests on soil, rock, and water samples:

  • Grain Size Distribution (Sieve and Hydrometer)

  • Atterberg Limits (LL, PL, PI)

  • Moisture Content

  • Bulk and Dry Density

  • Specific Gravity

  • Proctor Compaction (Standard & Modified)

  • California Bearing Ratio (CBR)

  • Direct Shear and Unconfined Compression Tests

  • Consolidation Tests

  • Permeability (Falling Head & Constant Head)

  • Chemical Testing: Sulfate, Chloride, pH, TDS, Organic Matter

3. Field Tests

  • Plate Load Test

  • Field Density Test (Sand Cone or Nuclear Gauge)

  • CBR (In-situ)

  • Percolation Test

  • Groundwater Table Monitoring

4. Pile Testing Support

Tohama supports foundation and piling works through:

  • Pile Integrity Test

  • Pile Load Test (Compression, Lateral, Tension)

  • Cross-hole Sonic Logging (CSL)

  • PDA (Pile Driving Analyzer)

Engineering Analysis and Reporting

Tohama’s team of engineers and geologists prepare comprehensive geotechnical investigation reports that include:

  • Soil stratification profiles

  • Bearing capacity analysis

  • Settlement calculations

  • Recommendations for foundation type and depth

  • Ground improvement methods (if needed)

  • Excavation, dewatering, and slope stability recommendations

Reports are tailored to meet project-specific codes and client requirements (e.g., Iraqi specifications, BS, ASTM, AASHTO, Eurocode).

Experience and Key Projects

Tohama has successfully conducted geotechnical investigations for major public and private clients, including:

  1. Model Schools Project (86 Schools) – Power China / Basra Governorate

  2. Basra Water Supply Improvement Project – Al-Meer Co.

  3. Nuclear Medicine Ward – ENI / AL-Mouyasser Co.

  4. Waste Management Incinerator Project – Shell / Al-Yamama

  5. Majnoon Oil Field (Well Pads & Access Roads) – Shell / Growth 2 Projectاعمال تحريات التربةGEOTECHNICAL INVESTIGAT…

Standards and Certifications

Tohama’s geotechnical activities are conducted under the supervision of a certified QA/QC team, in compliance with:

  • ISO 9001 – Quality Management

  • ISO 17025 – Laboratory Testing

  • ISO 45001 / 14001 – Health, Safety & Environment

  • Iraqi National Standards, ASTM, BS, DIN, AASHTO

Conclusion

 

The Geotechnical Investigation Department at Tohama Company provides the foundational insight necessary for safe and cost-effective engineering decisions. With advanced testing capabilities, experienced staff, and a commitment to international standards, Tohama plays a key role in ensuring structural stability and long-term project performance across Iraq’s strategic developments.

Frequently Asked Questions