The results of a refraction survey (Figure 3.45a) at a site are given in the following table. Determine the thickness and the P-wave velocity of the materials encountered.

Distance from the source of disturbance (m) ………….. Time of first arrival of P waves (s × 10³)

2.5 …………………………………………………………………………. 5.08

5.0 …………………………………………………………………………. 10.16

7.5 …………………………………………………………………………. 15.24

10.0 …………………………………………………………………………. 17.01

15.0 …………………………………………………………………………. 20.02

20.0 …………………………………………………………………………. 24.2

25.0 …………………………………………………………………………. 27.1

30.0 …………………………………………………………………………. 28.0

40.0 …………………………………………………………………………. 31.1

50.0 …………………………………………………………………………. 33.9

Figure 3.45a

 

Transcribed Image Text:

A vI (x) B (x2) C (x3) D Layer I v Z, Velocity Velocity Layer II Layer III V3 Velocity (a) V3