An excavation has to be made in a 10 m deep clay stratum underlain by a bed of sand. In a trial borehole made, the ground water was found to rise to an elevation of 3.5 m below ground level. The depth upto which excavation can be done safely without bottom becoming unstable due to uplift pressure of ground water will be m.
An excavation has to be made in a 10 m deep clay stratum underlain by a bed of sand. In a trial borehole made, the ground water was found to rise to an elevation of 3.5 m below ground level. The depth upto which excavation can be done safely without bottom becoming unstable due to uplift pressure of ground water will be m.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![An excavation has to be made in a 10 m deep clay
stratum underlain by a bed of sand. In a trial borehole
made, the ground water was found to rise to an
elevation of 3.5 m below ground level. The depth upto
which excavation can be done safely without bottom
becoming unstable due to uplift pressure of ground
water will be
m.
[Take Yw
= 9.81 kN/m3, G = 2.7 and e = 0.7]
%3D
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5007c364-cbe2-47a2-a811-273f819a3ca8%2F67197e5a-1898-447e-8a2c-616b3978b8da%2Fxzug1jp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:An excavation has to be made in a 10 m deep clay
stratum underlain by a bed of sand. In a trial borehole
made, the ground water was found to rise to an
elevation of 3.5 m below ground level. The depth upto
which excavation can be done safely without bottom
becoming unstable due to uplift pressure of ground
water will be
m.
[Take Yw
= 9.81 kN/m3, G = 2.7 and e = 0.7]
%3D
%3D
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