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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The results shown in the following table were obtained at the peak in a series of CU tests with constant cell pressure (isotropic) for a given soil. Cell Pressure (σc, kPa) Axial Stress at Failure (σd, kPa) Pore Pressure (Δu, kPa) 100 260 30 200 450 60 a) draw the effective stress path using p-q diagram of each test. b) draw s-t stress paths (effective) and determine the shear strength parametres (Φ', c') using Kf - line.
Q18 Please provide justified answer asap
# 3) A sand soll sample is subjected to a direct shear test under a normal load of 185 kPa. The specimen failed when the shear stress reached 100 kPa. If the normal load is increased to 240 kPa, what will be the shear strength of the specimen?
4. Please answer parts a and b
Two undrained triaxial tests were conducted on soil specimen, and they gave the following results: Sample Confining Pressure Deviator Stress A 350 kN/m² B 500 kN/m² 150 kN/m² 300 kN/m² The shear strength of sample A in the plane of it's normal stress is A 588 kPa B 283 kPa C 730 kPa D 165 kPa Correct Option