The following results were obtained from CU tests on a clay soil that is the foundation material for an embankment. σ, (kPa) 300 400 600 0₁-0, (kPa) 331 420 487 Au (kPa) 111 160 322 (a) Determine the total and effective principal stresses for all three tests (You may summarize them in a table). (b) Recommend the shear strength parameters to be used for short-term and long-term analyses. The maximum confining pressure (cell pressure) at the depth of interest is 300 kPa. (Note: the clay is a normally consolidated one).

The following results were obtained from CU tests on a clay soil that is the foundation material for an embankment. σ, (kPa) 300 400 600 0₁-0, (kPa) 331 420 487 Au (kPa) 111 160 322 (a) Determine the total and effective principal stresses for all three tests (You may summarize them in a table). (b) Recommend the shear strength parameters to be used for short-term and long-term analyses. The maximum confining pressure (cell pressure) at the depth of interest is 300 kPa. (Note: the clay is a normally consolidated one).

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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Ex 20 The shear strength parameters of N.C.C. are; =15, B = 30' a) In a Cutest on the same soil, the confining pressure is (150) kulu². Find the deviator stress at failure. b) In a slow direct shear test, the normal stress is (100) kN/m². Find the shear stress at failure. c) In an Unconfined compression test, the unconfined shear strength (Cu) is (50) kN/m². Find the pore water pressure at failure (assume c =o).
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