Seismic Wave Velocity as a Means of In-Place Density Measurement

摘要

The objective of this investigation was to apply principles of first-arrival seismic refraction to the problem of determining in-place dry density in a soil embankment. The seismic refraction technique is a method by which velocity of a seismic wave is obtained by measuring the time for the wave to travel between known distances measured on the ground surface. The laboratory method of study involved correlation of results of seismic wave measurements with conventional dry density and moisture content measurements of several soils. Field seismic measurements were correlated to in-place moisture-density determinations. The ultimate goal was an economic improvement in construction control testing, since the time required to perform an in-place seismic measurement on an embankment in much less than that required for conventional moisture-density determination. (Author)