Two consolidated-undrained (CU) triaxial tests are carried out on a sample of saturated overconsolidated clay. Table Q2 lists the main results at failure. 2. Table Q2: Results from CU triaxial test Test No Minor principal total stress 03 [kPa] 30 Axial load Pore water pressure [N] 450 [kPa] 10 Test 1 Test 2 60 700 20 (a) Based on the results in Table Q2, calculate the following total and effective principal stresses at failure: 01, o'1, o'3 in kPa. For the calculation, consider a constant cross-sectional area of the sample of 100 cm? 8 marks (b) Draw the two Mohr Circles at failure and the failure envelope for Test 1 and Test 2. 110 ma (c) Compute the relevant effective strength parameters obtained from Test 1 and Test 2.

Two consolidated-undrained (CU) triaxial tests are carried out on a sample of saturated overconsolidated clay. Table Q2 lists the main results at failure. 2. Table Q2: Results from CU triaxial test Test No Minor principal total stress 03 [kPa] 30 Axial load Pore water pressure [N] 450 [kPa] 10 Test 1 Test 2 60 700 20 (a) Based on the results in Table Q2, calculate the following total and effective principal stresses at failure: 01, o'1, o'3 in kPa. For the calculation, consider a constant cross-sectional area of the sample of 100 cm? 8 marks (b) Draw the two Mohr Circles at failure and the failure envelope for Test 1 and Test 2. 110 ma (c) Compute the relevant effective strength parameters obtained from Test 1 and Test 2.

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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Concept explainers

Test for Determination of Shear Strength

The term shear strength is often associated with the soil. Shear strength is defined as the resistance to the deformation of soil particles due to the continuous action of shear stress. In short, shear strength is the maximum shear stress that a soil can sustain.

Question

100%

Two consolidated-undrained (CU) triaxial tests are carried out on a sample of
saturated overconsolidated clay. Table Q2 lists the main results at failure.
2.
Table Q2: Results from CU triaxial test
Minor principal
total stress 03
[kPa]
30
Test No
Axial
load
Pore water
pressure
[N]
450
[kPa]
10
Test 1
Test 2
60
700
20
(a) Based on the results in Table Q2, calculate the following total and effective
principal stresses at failure: 01, o'1, o'3 in kPa. For the calculation, consider
a constant cross-sectional area of the sample of 100 cm?.
8 mark
(b) Draw the two Mohr Circles at failure and the failure envelope for Test 1 and
Test 2.
[10 mas
(c) Compute the relevant effective strength parameters obtained from Test 1
and Test 2.

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V1
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