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 8 x 5 x 10 C, V, Surface soil V = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10' sec AC, 33.75 x 1o sec AC: = 38.75 x 10 sec d, = 2.188 m dy = 22.5 m AB = 12,75 x 10 see V = 172 m/sec o d 20 d; Distance m 10 30 40 50 Figure Time of first wave arrival, seconds

Structural Analysis
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Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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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,
V, Surface soil
6.
V = 750 m/sec
Sand and loose gravel
V,
Rock
AB, = 8.75 x 10' sec
AC, 33.75 x 1 sec
AC: = 38.75 x 10 sec
d; = 2.188 m
dy = 22.5 m
AB = 12.75 x 10 sec
-V = 172 m/sec
20 d;
Distance m
10
30
40
50
Figure
Time of tirst 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, V, Surface soil 6. V = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10' sec AC, 33.75 x 1 sec AC: = 38.75 x 10 sec d; = 2.188 m dy = 22.5 m AB = 12.75 x 10 sec -V = 172 m/sec 20 d; Distance m 10 30 40 50 Figure Time of tirst wave arrival, seconds
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