Seismic Surface-Wave Tomography of Waste Sites - Final Report

Long, Timothy L.

Georgia Inst. of Tech., Atlanta, GA (United States)

关键词: Rayleigh Waves;    Rayleigh Waves Rayleigh Waves;    Seismic Surface Waves;    Group-Velocity Tomography;    Wastes;   

DOI  :  10.2172/781156
RP-ID  :  DOE/ER/14706
RP-ID  :  FG07-96ER14706
RP-ID  :  781156

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this study was to develop analysis programs for surface-wave group-velocity tomography, and apply these to three test areas. We succeeded by obtaining data covering two square areas that were 30 meters on a side, and a third area that was 16 meters on a side, in addition to a collaborative effort wherein we processed data from the Oak Ridge National Laboratory site. At all sites, usable group velocities were obtained for frequencies from 16 to 50 Hz using a sledgehammer source. The resulting tomographic images and velocity anomalies were sufficient to delineate suspected burial trenches (one 4-meters deep) and anomalous velocity structure related to rocks and disturbed soil. The success was not uniform because in portions of one area the inversion for shear-wave structure became unstable. More research is needed to establish a more robust inversion technique.