GPR Void Detection, Sinkhole & Structural Scanning

In civil engineering, the greatest risks are often geological, not utility-based. Civil Connect utilises high-frequency Ground Penetrating Radar (GPR) to provide a non-destructive "X-ray" of the ground and concrete structures.

While our utility teams look for pipes, our forensic GPR teams look for anomalies: voids, sinkholes, changes in ground density, and hidden structural reinforcement. We provide the engineering certainty required to load-bear heavy plant or certify structural integrity.

Our Specialist GPR Survey Capabilities

We separate our forensic GPR services into three distinct engineering disciplines:

Void Detection & Sinkhole Investigation: Sub-surface voids under roads and runways can lead to catastrophic collapse.

• Road & Runway Scanning: Rapidly scanning kilometres of pavement to detect voids caused by washed-out fines or leaking sewers.

• Sinkhole Analysis: Identifying the extent of ground relaxation or "soft spots" before a sinkhole opens up.

• Basement & Cellar Location: Locating unknown historical basements, crypts, or coal chutes under development sites.

Concrete Scanning & Rebar Location Before you drill or cut concrete, you need to know what is inside.

• Rebar Mapping: 3D mapping of reinforcement bars, post-tension cables, and mesh within concrete slabs.

• Slab Thickness: Verifying concrete depth and construction quality non-destructively.

• Flue & Chimney Location: Locating structural flues within walls for refurbishment projects.

Ground Stability & Heavy Lift Verification: Essential for Tier 1 logistics and crane operations.

• Crane Pad Surveys: Scanning the ground where crane outriggers will sit to ensure there are no hidden voids or weak zones that could cause the crane to topple.

• Backfill Verification: Checking that trenches have been compacted correctly and contain no air pockets that will lead to future subsidence.

Technical Geophysics: Beyond the "Beep"

Standard GPR surveys often just mark targets. We provide geotechnical correlation.

• Data Interpretation: Our geophysicists analyse the GPR wave velocity to distinguish between a hollow void, a water-filled pocket, or a dense obstruction.

• Targeted Remediation: We don't just find the void; we help determine if it was caused by a leaking drain (washout) or natural geology, allowing you to fix the root cause.

Why Choose Civil Connect for Structural GPR?

• High-Frequency Antennas: We use specialised 2.0GHz+ antennas for concrete and shallow void resolution, offering far greater detail than standard utility mapping units.

• Forensic Reporting: We deliver detailed "Radargrams" and cross-sectional slices, giving structural engineers the data they need to sign off on safety cases.

• Rapid Mobilisation: We can deploy urgently to investigate potential sinkholes or road collapses.

Why Tier 1s and Councils Partner with Civil Connect

We bridge the gap between complex engineering and field-level execution.

Tier 1 safety culture ensures every job is done correctly the first time, while.

Local Partner mentality keeps us responsive and cost-effective for developers and councils alike.

Don't let a hidden void undermine your project. Contact the Civil Connect GPR Division to discuss your void detection or concrete scanning requirements.