the velocity of the bedrock _________meter/second. 4) Critical distance from the source point ___

the velocity of the bedrock _______meter/second. 4) Critical distance from the source point _

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter19: Drilled Shaft

Section: Chapter Questions

Problem 19.10P

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Question

Problem
1) Determine the depth to bedrock for a site. _______meters
2) Determine the velocity of the overburden _______meter/second and
3) Determine the velocity of the bedrock _________meter/second.
4) Critical distance from the source point __________meters
Geophone 1 is 20 meters from the shot point and each geophone is
20meters from the next one.
Geophone First Arrival time (seconds)
1 0.015
2 0.031
3 0.046
4 0.062
5 0.077
6 0.089
7 0.094
8 0.099
9 0.105
10 0.110
11 0.115
12 0.121

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