ground penetrating radar surveys

Ground Penetrating Radar (GPR)
scanning & surveying

Ground Penetrating Radar (GPR) is a geophysical NDT (non-destructive technique) of scanning for services and utilities underground. The basic principle of GPR is the transmission of a short electromagnetic pulse, with a specified frequency, down into the ground and the recording of reflected energy as a function of time, amplitude and phase. The specified central frequency is controlled by the transmitter and receiver antenna length. The reflected energy is recorded as a “pattern” on radargrams which are displayed in real time. The radargrams are displayed in real time on the control unit and basic interpretation can be conducted on site. Often data is recorded and processed and analysed off-site using specialized software.

Utility Locating With Ground Penetrating Radar

To ensure the overall timely success of the job, utility detection is critical to any construction project where subsurface excavation is planned. If ignored, budget overruns multiply, your schedule turns chaotic and there’s risk of injuries taking place on your job site. To achieve the complete success you’re looking for, you’ll want to connect with an expert service provider like ORSCO (Pty) Ltd. We offer our clients a comprehensive range of reporting options, from marks on the ground, to a basic field sketch, to a full-blown report (GIS Auto CAD) that pinpoints buried electrical, water, gas, communication, sewer and storm drain lines. Our report provides you with a permanent utilities location record for future reference.

Concrete Scanning With Ground Penetrating Radar

With new build construction and renovation projects, the likelihood of needing to cut or core a concrete slab is high. There is inherent risk of striking rebar, electrical and communications conduits, and post tension cables during cutting, coring or drilling process. The cost of such mistakes can be prohibitive. Unreasonable constraints on already thin budgets can occur, as well as infusing havoc into your schedule and creating a safety hazard for your employees. Our well-trained, skilled, experienced technicians respond quickly to service requests, especially when your need for concrete scanning is a last-minute discovery. The result is professional, accurate and timely scanning – the exact satisfaction you’re seeking to mitigate risk and keep your employees safe.

GPR Applications

Our Ground Penetrating Radar solutions empower informed decision-making. Understanding what lies beneath the surface in materials like soil, rock, rubble, pavement, concrete, water, ice and snow opens endless possibilities.
Ground penetrating radar’s versatility coupled with integration with mapping and GPS technology, calibration techniques and 3D capabilities of a sophisticated subsurface imaging system allows it to be adjusted to suit a variety of applications.

Concrete Scanning & Assessment

Locate conduits, post-tension cables, and rebar/reinforcing wire mesh, detect current-carrying cables.

  • Evaluating Concrete Imaging
  • Plastic & Metal Conduits
  • Concrete Voids
  • Concrete Slab Thickness
  • Power Cable Responses
  • Main Power Line Location
  • Hidden Electric Cable

Utility Locating

Detect and Map Metallic or Plastic Utilities | Conduits & Voids | Gas Lines | Power Cables Conduits & Gas Lines

  • Detect Plastic & Non-Metallic Objects
  • Concrete Scanning
  • Duct Banks/Vaults

Forensic & Law Enforcement

Find buried evidence: bodies, weapons, caches of drugs, UXO detection, Intrusion monitoring.

  • Investigators receive an accurate indication of the location of the body
  • Ground Penetrating Radar guides exhumation
  • FINDAR speaks for murder victims
  • Locate buried evidence

Roads and Bridges

Measure pavement layer thicknesses, road structure assessment, and bridge deck deterioration analysis.

  • Construction Practice Zoning and Classifications
  • Bridge Deck Evaluation and Condition Reports
  • Pavement Structure Reports
  • Asphalt and Granular Thickness
  • Road Pavement Forensics

Rail Surveys

Railway Structure Investigations using GPR Technique

  • Locating Voids
  • Ballast
  • Granular layers
  • Ballast pockets
  • Custom made GPR RRV (Road Railway Vehicle)

 

Infrastructure

Locate conduits, post-tension cables, and rebar/reinforcing wire mesh.

  • Detect current-carrying cables.
  • Evaluating Concrete Imaging
  • Post-Tension Cables & Rebar
  • Plastic & Metal Conduits
  • Concrete Voids
  • Slab Thickness
  • Power Cable Responses
  • Main Power Line Location
  • Hidden Electric Cable

Mining & Quarrying

Explore hard rock (kimberlites, quarry stone) and sedimentary (potash)

  • Map stratigraphy
  • Detect hazards for mine safety
  • Mineral Exploration
  • Tunnelling & Underground Mines
  • Quarry Rock Quality

Geotechnical & Environmental

Faults and sinkholes, bedrock depth, soil stratigraphy Water table delineation BathymetryTunnelling.

Archaeological Survey

The need for techniques that provide rapid area coverage and detailed imaging of the subsurface to evaluate the historical sites without intrusive investigations naturally leads to exploiting the power of GPR.

  • Buried Walls & Foundations
  • Cemeteries & Unmarked Graves
  • Historic Construction
  • Historical Site Investigation
  • Precious Artefacts

Military

Find buried evidence: bodies, weapons, caches of drugs UXO detection Intrusion monitoring.

  • UXO & Landmines
  • GPR for IEDs
  • Unexploded Ordnance (UXO)
  • Intrusion Monitoring
  • Cables & Sensors Embedded in Walls
  • Clandestine Tunnels, Bunkers

Agriculture & Forestry

Check Material alteration or degradation in natural biological materials.

  • Agriculture, Forestry and Tree Roots
  • Golf Green Management
  • Agricultural Drainage Tiles
  • Metal Soil Water Content
  • Wooden Poles & Trees
  • Underground Storage Tanks
  • Septic Systems
  • Contaminant Delineation
  • Contaminant Remediation

Custom Solutions

Some applications include systems for Geology/Geophysics/Civil Engineering earth scientists study landforms, soils, groundwater, and ice.

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