Location
New York, New York
Date
15 Apr 2004, 4:15pm - 5:30pm
Abstract
A new seismic approach based on wavelet transforms of the surface response is proposed and applied to the problem of detection of shallow cavities under pavements. Seismic wave propagation is simulated by a transient response analysis on an axisymmetric finite element model. Shallow cavities in a homogeneous half-space and a pavement system of a variety of shapes and embedment depths are considered. The formulation of the continuous wavelet transform (CWT) is presented and its advantage over the traditional time or spectral analysis based methods is demonstrated through illustrative examples. The response of the medium at different surface points is presented in the wavelet based time-frequency maps. Waves reflected from the boundaries of a cavity introduce new features of specific time and frequency characteristics in the wavelet time-frequency maps. The characteristics of these features can be used to locate a cavity and estimate its size. As a case history, detection of a cavity/sinkhole under the pavement of a section of expressway I-80 in the northwestern New Jersey is presented.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Gucunski, Nenad and Shokouhi, Parisa, "Application of Wavelets in Detection of Cavities under Pavements by Surface Waves" (2004). International Conference on Case Histories in Geotechnical Engineering. 5.
https://scholarsmine.mst.edu/icchge/5icchge/session10/5
Application of Wavelets in Detection of Cavities under Pavements by Surface Waves
New York, New York
A new seismic approach based on wavelet transforms of the surface response is proposed and applied to the problem of detection of shallow cavities under pavements. Seismic wave propagation is simulated by a transient response analysis on an axisymmetric finite element model. Shallow cavities in a homogeneous half-space and a pavement system of a variety of shapes and embedment depths are considered. The formulation of the continuous wavelet transform (CWT) is presented and its advantage over the traditional time or spectral analysis based methods is demonstrated through illustrative examples. The response of the medium at different surface points is presented in the wavelet based time-frequency maps. Waves reflected from the boundaries of a cavity introduce new features of specific time and frequency characteristics in the wavelet time-frequency maps. The characteristics of these features can be used to locate a cavity and estimate its size. As a case history, detection of a cavity/sinkhole under the pavement of a section of expressway I-80 in the northwestern New Jersey is presented.
