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Grouting Verification Using 3-D Seismic Tomography
Traditional quality assurance methods for grouting are based on point measurements which may not reflect the characteristics of the entire treated soil profile. A volumetric, geophysics-based evaluation method was recently developed to analyze 3-D seismic data of subsurface conditions before and after grouting operations. Specifically, 3-D seismic tomography can be used to visualize the distribution in compression wave velocities in order to estimate spatial variations in engineering properties of subsurface materials. This rapid and nonintrusive method was applied to a recent roadway rehabilitation project to investigate its suitability in quality assurance programs for grouting. A case history is presented with emphasis on field grouting operations, seismic data collection procedures, 3-D seismic tomography data processing, and interpretation of results. Additionally, a framework is presented for the quantification of the volumetric improvement of the subsurface materials. Based on these results, the 3-D seismic tomography technique is recommended for verifying the effectiveness of future grouting projects.
Grouting Verification Using 3-D Seismic Tomography
Traditional quality assurance methods for grouting are based on point measurements which may not reflect the characteristics of the entire treated soil profile. A volumetric, geophysics-based evaluation method was recently developed to analyze 3-D seismic data of subsurface conditions before and after grouting operations. Specifically, 3-D seismic tomography can be used to visualize the distribution in compression wave velocities in order to estimate spatial variations in engineering properties of subsurface materials. This rapid and nonintrusive method was applied to a recent roadway rehabilitation project to investigate its suitability in quality assurance programs for grouting. A case history is presented with emphasis on field grouting operations, seismic data collection procedures, 3-D seismic tomography data processing, and interpretation of results. Additionally, a framework is presented for the quantification of the volumetric improvement of the subsurface materials. Based on these results, the 3-D seismic tomography technique is recommended for verifying the effectiveness of future grouting projects.
Grouting Verification Using 3-D Seismic Tomography
Lynch, Christopher (author) / Dodson, Marilyn (author) / McCartney, John S. (author)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 1506-1515
2012-08-17
Conference paper
Electronic Resource
English
Grouting Verification Using 3-D Seismic Tomography
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