Titlebook: Shallow Refraction Seismics; Bengt Sj?gren Book 1984 Bengt Sj?gren 1984 geophysics.geotechnical engineering.seismic.seismic refraction

環(huán)形

Applications,mes from the various subsurface layers have been carried out in both directions and the travel time curves from separate layouts have been connected by overlapping detectors. Since all examples given are of shallow investigations, rather small detector and shot separations have been used. The exampl

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In-Situ

Instrumentation, field work and interpretation procedure,rmation and the interpretation work must do justice to the field data obtained. A fourth factor affecting the reliability of the results is the positioning of the seismic lines with regard to the geology and the possibilities and limitations of the method.

遠(yuǎn)地點(diǎn)

Future prospects,gy sources available, an increased interest in including elastic constants, frequencies and amplitudes in evaluations, and a tendency to replace manual treatment of seismic data by computer processing clearly indicate the development to be expected.

RLS898

Introduction,rker on the subject. By 1925 the refraction method was well established as a tool in applied geophysics. In the early days the method was used for oil exploration and for detecting hidden salt domes. At the beginning of the ’thirties the refraction technique was also seen to be applicable to civil engineering problems.

埋伏

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