✓ SAAC ISO/IEC 17025 Accredited
✓ ARAMCO Vendor #10043591
✓ EP Municipality Approved EP-G6125
✓ ASTM D1586 · ASTM D2216
Geotechnical Investigation & GPR
Know Your Ground Before You Build.
Geotechnical investigation is the foundational discipline of construction engineering - it determines what your structure will rest on, how it will perform, and whether the ground will support your design loads. A missed soil layer or undetected subsurface void can mean catastrophic cost overruns or structural failure.
HGL's geotechnical investigation team combines hydraulic drilling, Standard Penetration Testing (SPT), undisturbed sampling, laboratory analysis, and Ground Penetrating Radar (GPR) scanning to build a complete picture of your subsurface conditions - delivered in a comprehensive, engineer-signed geotechnical study report.
WHAT WE DELIVER
Investigation Services
Geotechnical Investigation Studies
Systematic borehole drilling and sampling program to characterize subsurface soil and rock conditions across a proposed development area. Includes classification, strength, compressibility, and groundwater data for foundation design.
What's Included:
- →Hydraulic rotary borehole drilling
- →Standard Penetration Test (SPT) at intervals
- →Undisturbed Shelby tube sampling
- →Disturbed bulk and split-spoon sampling
- →Groundwater level measurement
- →Full laboratory testing of recovered samples
- →Engineer-signed geotechnical study report
APPROVAL: EP Municipality EP-G6125 · ASTM D1586 · BS 5930
Ground Penetrating Radar (GPR) Scanning
Non-destructive electromagnetic scanning technology that creates detailed cross-sectional images of subsurface conditions - detecting buried utilities, voids, geological boundaries, and reinforcement without any excavation or drilling.
Ideal For:
- →Pre-excavation utility detection
- →Void and cavity detection beneath slabs
- →Layer boundary mapping in pavements
- →Rebar and post-tension cable location
- →Archaeological and environmental surveys
- →Tank and pipe detection
- →GPR profile report with interpreted cross-sections
NON-DESTRUCTIVE · FAST RESULTS · ZERO SITE DISRUPTION
Laboratory Tests Conducted on Retrieved Samples
All samples recovered during geotechnical investigation are tested in our accredited laboratory, with results incorporated into the final geotechnical study report.
Classification & Index Tests
- Particle Size Analysis (ASTM D6913)
- Hydrometer Analysis (ASTM D422)
- Liquid Limit (ASTM D4318)
- Plastic Limit & PI (ASTM D4318)
- Moisture Content (ASTM D2216)
- Specific Gravity (ASTM D854)
Strength & Compressibility
- Unconfined Compressive Strength (ASTM D2166)
- Direct Shear Test (ASTM D3080)
- Consolidation Test (ASTM D2435)
- CBR Laboratory (ASTM D1883)
- Max/Min Density (ASTM D4253/D4254)
Chemical Characterization
- Sulfate Content (BS 1377 Part 3)
- Chloride Content (BS 1377 Part 3)
- TDS of Water ASTM 5907
- pH of Soil (BS 1377)
- Soil Classification USCS/AASHTO (ASTM D2487)
What You Receive
Borehole Logs
Detailed borehole records with stratigraphy, SPT N-values, sample descriptions, and groundwater data.
Laboratory Test Reports
Full set of accredited laboratory test certificates for all recovered samples - per ISO/IEC 17025.
Geotechnical Study Report
Comprehensive engineer-signed report with soil profile, foundation recommendations, and design parameters.
GPR Scan Report
Interpreted GPR cross-sections with annotated anomalies, utility locations, and depth profiles.
Need a Geotechnical Study or GPR Scan?
Municipality-approved · ARAMCO-compliant · ISO/IEC 17025 accredited. Fast mobilization across Al-Ahsa, Jubail, Dammam, and the Jafurah Gas Field.