Land Geophysics & Underground Investigations
Kordil provides land geophysical surveys to investigate buried infrastructure, ground conditions and potential obstructions before and after construction. We combine ground-penetrating radar (GPR), GNSS-integrated land gradiometry and other geophysical methods with penetration testing, boring and sampling selected for the project.
- Land UXO investigations for civil construction
- Underground utility and structure identification
- Archaeological geophysics and non-intrusive site assessment
- Post-construction concrete scanning and thickness assessment
- Ground penetration testing, boring and sampling
Top-grade instrumentation, precise survey positioning and documented quality control support clear maps, interpreted sections and practical investigation reports. Marine applications are covered under our Offshore Survey Services.
Land Gradiometer & UXO Surveys
High-sensitivity land magnetometers and gradiometers measure magnetic variations associated with buried ferrous objects. Kordil uses survey-grade instrumentation, including GEM Systems potassium gradiometers, for land UXO investigations, buried-object mapping and civil construction site assessment.
Paired magnetic sensors record the field gradient, helping distinguish local anomalies from broader background variation. Survey coverage and sensor configuration are selected to suit the expected targets, terrain and magnetic interference. Processed anomaly maps and a coordinated target register support follow-up investigation.
For civil projects, magnetic results can be correlated with GPR, site records and other survey evidence. A magnetic anomaly alone does not identify an object as UXO; intrusive verification and any clearance require appropriately qualified specialists.
Integrated GNSS & Top-Grade Instrumentation
Integrated GNSS links survey measurements to their ground position. RTK GNSS can provide centimetre-level positioning under suitable correction and satellite conditions; total-station control or a surveyed local grid can support areas with restricted reception.
Our survey workflow combines high-sensitivity magnetic sensors, GPR antennas selected for the required resolution and depth, and precise positioning. Sensor offsets, timing, instrument checks and repeat measurements are recorded so that mapped features can be relocated. Positioning quality, survey coverage and interpretation limits are included in the report.
Georadar: Utilities & Underground Structures
Ground-penetrating radar surveys help locate buried pipes, cables, ducts, foundations and other subsurface features where surface indications or as-built records are incomplete. High-resolution GPR and complementary utility-location methods support infrastructure mapping before excavation, route crossings and construction works.
Antenna selection balances detail and investigation depth. Results are tied to the project coordinate system and presented as interpreted alignments, sections and depth estimates where supported by the data. Soil conductivity, moisture, reinforcement and target properties influence detection; critical services require appropriate verification before excavation.
Archaeological Geophysics
Non-intrusive surveys help identify possible buried walls, foundations, ditches and other archaeological features before development. GPR and magnetic methods can be combined with electrical resistivity or seismic surveys where appropriate to the site and investigation objectives.
Georeferenced results support heritage assessment for roads, bridges, mining developments and construction sites. Interpretation is coordinated with archaeological expertise to distinguish potential cultural features from geological variation and modern infrastructure.
Post-Construction Surveys & Concrete Scanning
High-frequency GPR supports the inspection of concrete slabs, walls and structural elements. Applications include reinforcement mapping, locating embedded conduits and identifying features that should be investigated before drilling, cutting or refurbishment.
Concrete thickness can be assessed where the back-face reflection is resolved and the radar velocity is calibrated or otherwise supported. Dense reinforcement and material conditions may limit visibility. Where required, radar findings are correlated with drawings, accessible thickness measurements, cores or complementary non-destructive tests; GPR alone does not establish concrete strength.
Ground Penetration Testing
Geotechnical penetration tests complement geophysical mapping by measuring the ground's resistance to penetration. Depending on the ground conditions and investigation plan, the scope may include cone penetration testing (CPT/CPTu), standard penetration testing (SPT) in boreholes or dynamic probing.
Test locations, levels and depth records are surveyed and correlated with geophysical results and samples. These measurements support geotechnical interpretation of stratigraphy and ground variability. Penetration testing is a physical ground investigation method, distinct from ground-penetrating radar.
Boring & Sampling
Boreholes and soil or rock samples provide direct evidence to check geophysical interpretations. The investigation scope defines drilling depths, sampling methods and any in-situ or laboratory testing needed for the project.
Surveyed borehole positions, geological logs, sample identification and relevant groundwater observations are brought together with the geophysical dataset. This combined approach supports foundation studies, excavation planning and the investigation of variable or unexpected ground conditions.
Geological Investigation, Processing & Reporting
For geological and mineral investigations, magnetic, seismic, electrical resistivity, self-potential and gravity methods are selected according to the target and site conditions. Two- and three-dimensional interpretations can guide further investigation; resource assessment requires suitable geological and sampling evidence.
Deliverables can include utility maps, magnetic anomaly maps, radar sections, target coordinates, borehole and test-location plans, and an integrated interpretation report. Kordil combines its software and positioning expertise with field checks to document findings, coverage and remaining uncertainty.
Send your site location, approximate area, target depths and project objectives to request a quotation.
