Example 9.12 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. Vy = 2250 m/sec 8 x5 x 10 Surface soil V; = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10 see AC, = 33.75 x 10' sec AC = 38.75 x 10' sec d =2.188 m V3 172 m/sec d; = 22.5 m AB = 12.75 x 10' sec 10 20 d; 30 40 50 Distance m Figure Time of first wave arrival, seconds 6.
Example 9.12 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. Vy = 2250 m/sec 8 x5 x 10 Surface soil V; = 750 m/sec Sand and loose gravel V, Rock AB, = 8.75 x 10 see AC, = 33.75 x 10' sec AC = 38.75 x 10' sec d =2.188 m V3 172 m/sec d; = 22.5 m AB = 12.75 x 10' sec 10 20 d; 30 40 50 Distance m Figure Time of first wave arrival, seconds 6.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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