Answered: after the tank

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

6. A circular foundation of diameter 8 m supports a tank. The base of the foundation is at 1 m below the ground surface. The vertical load is 20 MN. The tank
foundation is supported by a soil with undrained shear strength equal to 80 kPa
and saturated unit weight of 19 kN/m3, dry unit weight of 17.6 kN/m3 and angle
of internal friction equal to 25°. Ground water table is 4 meters below the surface
and assumed to be stable. Fourteen months after the tank was constructed,
during a week of intense rainfall, the foundation failed. It was speculated that
failure occurred by bearing capacity failure. Clarify whether this is so or not.

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