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A seismic survey was carried out for a large project to determine the nature of the substrata. The results of the survey are given in Fig. i in the form of a graph. Determine the depths of the strata. V, = 2250 m/sec 8 x5 x 10 Surface soil V = 750 m/sec Sand and loose gravel H V, Rock AB, = 8.75 x 10' sec AC, = 33.75 x 10 sec AC, = 38.75 x 10' sec d, = 2.188 m d; = 22.5 m AB = 12.75 x 10 sec V = 172 m/sec 0 d 20 d 30 Distance m 50 10 Figure Time of first wave arrival, seconds

A seismic survey was carried out for a large project to determine the nature of the substrata. The results of the survey are given in Fig. i in the form of a graph. Determine the depths of the strata. V, = 2250 m/sec 8 x5 x 10 Surface soil V = 750 m/sec Sand and loose gravel H V, Rock AB, = 8.75 x 10' sec AC, = 33.75 x 10 sec AC, = 38.75 x 10' sec d, = 2.188 m d; = 22.5 m AB = 12.75 x 10 sec V = 172 m/sec 0 d 20 d 30 Distance m 50 10 Figure Time of first wave arrival, seconds

Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter17: Subsoil Exploration
Section: Chapter Questions
Problem 17.8P: Refer to Problem 17.7 and Figure 17.16. Suppose a footing (1.5 m 1.5 m) is constructed at a depth...
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A seismic survey was carried out for a large project to determine the nature of the substrata. The results of the survey are given in Fig. i 2 in the form of a graph. Determine the depths of the strata. V, = 2250 m/sec x 5 x 10 C, Surface soil V = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10'sec AC, 33.75 x 10 sec AC: = 38.75 x 10 sec d; = 2.188 m d = 22.5 m AB = 12,75 x 10 sec V = 172 m/sec 10 20 d; 30 40 50 Distance m Figure Time of first wave arrival, seconds
Transcribed Image Text:A seismic survey was carried out for a large project to determine the nature of the substrata. The results of the survey are given in Fig. i 2 in the form of a graph. Determine the depths of the strata. V, = 2250 m/sec x 5 x 10 C, Surface soil V = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10'sec AC, 33.75 x 10 sec AC: = 38.75 x 10 sec d; = 2.188 m d = 22.5 m AB = 12,75 x 10 sec V = 172 m/sec 10 20 d; 30 40 50 Distance m Figure Time of first wave arrival, seconds
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