d. In a trial bore hole, the grour 3 m below ground surface.Finc carried out without the hottom

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter13: Slope Stability
Section: Chapter Questions
Problem 13.12P
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Time left 1:24:08
An excavation is to be performed in a stratum of clay, 9 m thick, underlain by
a bed of sand. In a trial bore hole, the ground-water is observed to rise up to
an elevation 3 m below ground surface.Find the depth of which the excavation
can be safely carried out without the bottom becoming unstable under uplift
pressure of ground-water. The specific gravity of clay particles is 2.70 andthe
void ratio is 0.70. If the excavation is to be safely carried to a depth of 7 m,
how much should the water table be lowered in the vicinity of the trench ?
O a. 6 m
O b. 9 m
C.
O c. 10 m
O d. 8 m
SHOT ON POCO F3
Transcribed Image Text:Time left 1:24:08 An excavation is to be performed in a stratum of clay, 9 m thick, underlain by a bed of sand. In a trial bore hole, the ground-water is observed to rise up to an elevation 3 m below ground surface.Find the depth of which the excavation can be safely carried out without the bottom becoming unstable under uplift pressure of ground-water. The specific gravity of clay particles is 2.70 andthe void ratio is 0.70. If the excavation is to be safely carried to a depth of 7 m, how much should the water table be lowered in the vicinity of the trench ? O a. 6 m O b. 9 m C. O c. 10 m O d. 8 m SHOT ON POCO F3
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