3D Full-waveform Inversion, Geotechnical site characterization, Sinkhole detection
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Description:
We have successfully developed an advanced 3D FWI method using surface-based seismic wavefields for geotechnical site characterization. The method is based on the solution of 3D elastic wave equations, and Gauss-Newton inversion approach. The capabilities of the developed 3D FWI method has been tested on both synthetic and several field experimental datasets. The analyzed results from synthetic datasets show great capabilities of the 3D FWI method in characterizing laterally variable low- and high-velocity layers, and in detecting buried voids at various depths. Comparing the conventional FWI analyses based on the classic cross-adjoint inversion, our method based on the Gauss-Newton inversion provides more accurate and higher resolution inverted results. Accurate results are also obtained from field experiments at four different test sites in Florida. Known cavity (culvert), unknown buried voids (pre-collapsed sinkholes) at both shallow depths of 5 m to 10 m and larger depths up to 40 m, and variable soil/rock layers are well characterized and confirmed by the ground truth.
Experiment | Field testing of the developed 3D FWI method using a drop weight at Newberry, FL
Cite This Data:
Tran, K., M. Mirzanejad (2020). "Field testing of the developed 3D FWI method using a drop weight at Newberry, FL", in Geotechnical Site Characterization with 3-D Seismic Waveform Tomography. DesignSafe-CI. https://doi.org/10.17603/ds2-vyy3-0757
View Data
Author(s)
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Facility
FDOT Rentention Site At Newberry, FL
Experiment Type
Full Scale Seismic Testing
Equipment Type
Propelled Energy Generator
Date of Experiment
2019-02-28 ― 2019-02-28
Date Published
2020-11-06
DOI
10.17603/ds2-vyy3-0757
License
Open Data Commons Attribution
Description:
Field tests were performed to assess the ability of the developed 3D FWI method in characterizing subsurface features, and in void detection. Data was collected using the drop of a 100 lb weight from a certain height for each shot . This acts as a pulse source containing many frequencies. The dataset obtained from this analysis was analyzed and it was revealed that the developed 3D FWI method could successfully detect variable subsurface layering features and voids using a 2D array of sensors on the surface. The data obtained as part of the experiment is stored in data files for each shot location. Each data file contains information gathered by all the channels.
Model Configuration | 3D FWI testing configuration for the PEG
Description:
Contains information on the source location and sampling rate
File Name
Sensor Information | FWI sensor information for PEG
Description:
(N/A)
File Name
Event | Data files for the field testing using PEG
Description:
Contains wavefield data from all the shots and channels. contains a read me file with information on how to read the files in MATLAB.
Experiment | Field testing of the developed 3D FWI method using a mobile shaker at Newberry, FL
Cite This Data:
Tran, K., F. Menq (2020). "Field testing of the developed 3D FWI method using a mobile shaker at Newberry, FL", in Geotechnical Site Characterization with 3-D Seismic Waveform Tomography. DesignSafe-CI. https://doi.org/10.17603/ds2-xyee-sq19
View Data
Author(s)
;
Facility
FDOT rentention site at Newberry, FL
Experiment Type
Full scale seismic testing
Equipment Type
Mobile shaker
Date of Experiment
2018-05-22 ― 2018-05-24
Date Published
2020-11-06
DOI
10.17603/ds2-xyee-sq19
License
Open Data Commons Attribution
Description:
Field tests were performed to assess the ability of the developed 3D FWI method in characterizing subsurface features, and in void detection. Data was collected using a mobile shaker called the Thumper. A controlled source signature was used during the testing procedure. The dataset obtained from this analysis was analyzed and it was revealed that the developed 3D FWI method could successfully detect variable subsurface layering features and voids using a 2D array of sensors on the surface. The data obtained as part of the experiment is stored in data files for each shot location. Each data file contains information gathered by all the channels.
Model Configuration | 3D FWI testing configuration for Thumper
Description:
Contains source locations and information on the source signature.
File Name
Sensor Information | FWI sensor information
Description:
(N/A)
File Name
Event | Date files for the field test using Thumper
Description:
Contains Data files for all the shot locations with each file containing all the channels
