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Author:
Christopher Phillips
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2006-01-15 |
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As a geophysicist, I am dismayed by the lack of discussion in the geophysics forum.
There have been many advances in geophysics in the last number of years, with advances in equipment, research, and low cost of computing power.
We have conducted various geophysical projects for geotechnical clients, including:
- Investigation of extent of voids beneath concrete slabs
- Concrete integrity testing
- Pile Integrity Testing
- Pavement and Asphalt Thickness (Road GPR)
- Bridge Deck Investigations (Delamination/Deterioration mapping)
- Soil/Rock Stiffness profiling using SASW/MASW, crosshole seismic, VSP, and shear refraction
- Fracture detection and orientation mapping for joint set mapping of proposed open pit mines
This board (geophysics) has been pretty stagnant, with most discussion related to MASW.
I would like to try and open up this discussion forum with increased interest from geotechnical engineers with questions about how geophysics can help them with their specific problems.
There are a number of geophysical methods, including:
- MASW/SASW
- Seismic Methods
- Ground Penetrating Radar
- Electrical Resistiviy Methods
- Electromagnetic Methods
- Magnetic Methods
- Non Destructive Testing Methods
All of which have application to the geotechnical engineer and should be seen as another tool in your toolbox.
Please post in this forum if you have any questions about how geophysics can help with your specific problem, or help better approach a problem you often encounter. Post a problem and some information on the project and let the geophysics community see what we can do to provide you a solution that can help.
Thanks,
Christopher Phillips.
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Follow-up:
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Author:
Zivko Terzic
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2006-01-22 |
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I am glad to see someone's started this topic. I agree with you in this totally. We should be more aggressive in promoting geophysics' capabilities in solving geotechnical problems, especially in this computerized era. The cost and efficiency of geophysics increased dramatically in the last two decades. This is a good chance to make geophysics unavoidable in engineering practice.
I know many geotechnical engineers who are skeptics in regards to geophysics use in solving engineering problems. There are many though who are not that skeptic.
I recently conducted a resistivity survey coupled with GEM2 in order to resolve a geotechnical problem concerning a karst cavity. Based on results, we recommended some additional drillings with confirmative results in terms of cavity depth and size. Now we have lots of job offers in similar problems resolution.
I support the idea of geophysicists’ cooperation without frontiers. Therefore, I have a question. It is in regards to a shallow refraction survey. I am going to collect some refraction data next week. I was originally planning to use a conventional refraction method with very short geophone equidistance of 1-2 m. It is a good opportunity for me to try the MASW though. I will collect those data along the conventional refraction data as well. My question would be: What software has better reputation in processing the MASW data? And if possible what is the renting and/or licensing price?
Regards,
Zivko Terzic
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Follow-ups:
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»
Singh, P., 2006-01-15
»
Christopher Phillips, 2006-01-15
»
Vipul Nagar, 2006-01-17
»
Zivko Terzic, 2006-01-22
»
Dr. C. Krishnaiah, 2006-01-27
»
Brian Williams, P.E., P.G., 2006-02-14
»
Matt, 2006-02-16
»
Christopher Phillips, 2006-02-17
»
Derek Irving, 2006-03-09
»
Derek Irving, 2006-03-09
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Subject:
Geophysics for Geotechnical Applications 