United States Department of Transportation
i
Evaluate Geophysical Methods to Detect Underground Voids
-
2024-06-01
[PDF-17.58 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:September 2020 – July 2023
-
Corporate Publisher:
-
Abstract:Four geophysical methods were comparatively assessed for their ability to detect subsurface anomalies/voids, namely, Electrical Resistivity Tomography (ERT), Multichannel Analysis of Surface Waves (MASW), Ground Penetrating Radar (GPR), and Full-Waveform Inversion (FWI). We found that: a. ERT is well-suited for detecting and localizing subsurface anomalies, but may not be able to accurately size or characterize the material composition of an anomaly/void; b. MASW is unsuitable under most realistic field conditions; c. FWI appears suitable based on computational simulations, and would likely meet the demands of field conditions, but this capability was not tested; and d. GPR’s ability in anomaly detection is very limited due to depth constraints, it lacks consistency, and depends highly on operator experience; even when detection is successful, sizing and characterizing the anomaly using GPR is infeasible. Given field realities common to most infrastructure projects, we recommend the continued, but careful, use of ERT for detecting subsurface anomalies/voids. We also recommend that future research endeavors be concentrated on a. joint-inversion and multi-physics-based methods; b. software development.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
