Monitoring of Fluid Injection and Soil Consolidation Using Surface Tilt Measurements
Temporal variations of surface tilt may be used for the noninvasive monitoring of subsurface volume change. Such volume changes may accompany settlement near structures, the response due to fluid injection or withdrawal, and excavation-related activity. We outline a methodology for using tilt data to estimate volume changes within poroelastic media. The expressions relating subsurface volume change and surface tilt are simple and compact, offering the possibility of real-time monitoring. The inversion of actual tilt data from a site near Raymond, Calif., generates images of fluid withdrawal from a complex fracture zone about 30 m below the surface. Volume changes are confined to an elongated north-south zone in agreement with independent well test data. We have also applied the methodology for the inversion of surface tilt to data from a grout injection experiment in Los Banos. The technique enables us to monitor grout migration through a porous gravel.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE. Office of Civilian Radioactive Waste Management. Office of External Relations; U.S. Geological Survey; Nevada Operations Office, Atomic Energy of Canada Limited (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 834408
- Report Number(s):
- LBNL-45001; JGGEFK; R&D Project: 465103; TRN: US200432%%270
- Journal Information:
- Journal of Geotechnical and Geoenvironmental Engineering, Vol. 124, Issue 1; Other Information: Journal Publication Date: January 1998; PBD: 1 Aug 1996; ISSN 1090-0241
- Country of Publication:
- United States
- Language:
- English
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