Seismic Near-Surface Imaging
S-scan near surface seismic imaging solution provided greater visibility into subsurface conditions
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The Challenge
- Diverted pipeline corridor created significant structural and safety risk to nearby infrastructure
- Surface sinkholes developed due to a water leak along a diverted one-meter diameter pipeline
- Continuous water infiltration washed fine soils into deeper voids, creating underground cavities and visible surface subsidence
Located in a region with variable near-surface geology, a diverted pipeline corridor was experiencing surface subsidence and suspected subsurface voiding, posing significant geotechnical risks. The client needed better visibility and understanding of the pipeline so they could evaluate the risks and decide whether or not to delocalize the pipeline and transition to a distributed system.
The Solution
Geocomp conducted a targeted, subsurface geotechnical investigation to identify weak layers, detect voids, and enable the project team to make informed decisions and take appropriate mitigation and stabilization measures.
Part of the S-scan seismic mapping system, the client deployed Geocomp’sdense, near‑surface imaging system to create high-resolution images of subsurface conditions. S-scan uses hybrid/passive seismic methods with dense receiver spacing (approximately 3m) and multi‑swath deployment.
486 WiNG sensors were deployed on an area of 498 meters by 170 meters for Phase 1 of the project.
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