Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, Volume 2The Society, 1988 - Engineering geology |
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Page 670
... reflection technique . Refraction As a void is a lower velocity volume than the enclosing medium , it cannot be a direct target for refraction surveying which is tuned to responding to high velocity transitions . In an indirect sense ...
... reflection technique . Refraction As a void is a lower velocity volume than the enclosing medium , it cannot be a direct target for refraction surveying which is tuned to responding to high velocity transitions . In an indirect sense ...
Page 672
... reflection record ( e.g. Dobecki and Balch , 1987 ) . In most circumstances , common midpoint ( CMP ) reflection methods have been the only means to observe such reflections and locate the voids . This method , however , is inherently ...
... reflection record ( e.g. Dobecki and Balch , 1987 ) . In most circumstances , common midpoint ( CMP ) reflection methods have been the only means to observe such reflections and locate the voids . This method , however , is inherently ...
Page 675
... reflection surveys for void detection , I felt confident that if I could clearly see the reflection from the horizon containing the void , then lateral disruptions in the character of this reflection would indicate a void . However ...
... reflection surveys for void detection , I felt confident that if I could clearly see the reflection from the horizon containing the void , then lateral disruptions in the character of this reflection would indicate a void . However ...
Contents
The Resistivity and Induced Polarization Methods | 519 |
Daniels Jeffrey J Well Logging for Engineering and Environmental | 521 |
Planning and Costing Geophysical Investigations for Engineering | 569 |
Copyright | |
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acoustic televiewer acoustic velocity anomaly approximately bedrock borehole borehole geophysical buried calibrated caliper cathodic protection Cedar Bog channel coal common offset contamination contour Core Hole density log Denver Formation depth determine drill hole drums electrical electrode electromagnetic engineering environment environmental exploration feet fluid level fluid resistivity gamma ray gamma ray log geologic geophone geophysical logs geophysical well log geophysicist gradient grid ground penetrating radar groundwater host rock indicate interpretation interval lithology located log measurements log response magnetic field magnetic susceptibility magnetometer meters migration minerals neutron neutron log neutron-neutron Nuclear Lake outwash overburden physical properties porosity potential probe radar recorded reflection resistivity logs resistivity measurements sample sand sandstone sedimentary sediments seismic refraction shallow shown in Figure SP log spacing subsurface surface survey target techniques temperature terrain conductivity total field vertical void waste water table wave