Principles of Foundation Engineering, SI Edition
9th Edition
ISBN: 9781337672085
Author: Das, Braja M., SIVAKUGAN, Nagaratnam
Publisher: Cengage Learning
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Chapter 3, Problem 3.18P
(a)
To determine
Find the undrained shear strength of the clay.
(b)
To determine
Find the corrected undrained shear strength of the clay for design purposes.
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a. A vane shear test was conducted in a saturated clay. The height and diameter of the rectangular vane were 4 in. and 2 in., respectively. During the test, the maximum torque applied was 230 lb-in. Determine the undrained shear strength of the clay. b. The clay soil described in part (a) has a liquid limit of 58 and a plastic limit of 29. What would be the corrected undrained shear strength of the clay for design purposes? Use Bjerrum’s relationship for λ [Eq. (3.40a)].
a. A vane shear test was conducted in a saturated clay. The height and diameter of the rectangular vane were 4 in. and 2 in., respectively. During the test, the maximum torque applied was 230 lb-in. Determine the undrained shear strength of the clay. b. The clay soil described in part (a) has a liquid limit of 58 and a plastic limit of 29. What would be the corrected undrained shear strength of the clay for design purposes? Use Bjerrum’s relationship for λ
A vane shear test was conducted in a saturated clay. The height and diameter of the rectangular vane were 4 in. and 2 in., respectively. During the test, the maximum torque applied was 230 lb-in. The clay soil has a undrained shear strength of 7.844 psi. It has a liquid limi of 58 and a plasic limi o 29. What would be the corrected undrained shear strength of the clay for design purposes?
Using Bjerum's relationship for λ.
λ = 1.7 - 0.54 log[PI(%)]
Chapter 3 Solutions
Principles of Foundation Engineering, SI Edition
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Refer to Figure P3.3. Use Eqs. (3.10) and (3.11)...Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - Prob. 3.25PCh. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Prob. 3.31P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- A soil profile consists of a clay layer underlain by a sand layers as shown. A tube is inserted into the bottom sand layer and the water level rises to 1.2m above the ground surface. Determine the effective stress at pt. A Determine the effective stress at pt. B. Determine the effective stress at pt. C Please answer this asap. For upvote. Thank you very mucharrow_forwardProblem 3: A vane shear test was conducted on a soft clay. The vane was 112 mm in height and 70 mm in diameter. It was pressed and fully penetrated into the clay with an applied torque, T. The test gave a result of corrected undrained shear strength of 34.65 kPa with a liquid limit of the soil equal to 60 and a plastic limit of 25. Determine the following: a) the torque T applied b) the unconfined compressive strength of clay c) the unconfined compression strength of clay in the remolded state if the soil sample has a sensitivity of 3.5.arrow_forwardAt failure, the major and minor principal stresses on a triaxial test are 200 kPa and 110 kPa respectively. If the porewater pressure at failure is 25 kPa... Q: What is the sine of the angle of shearing resistance of the soil? Round off your answer to two decimal places.arrow_forward
- Show solution. The answer must be A. 36.87 B. 14arrow_forwardcomplete plsarrow_forward2. A series of consolidated, undrained triaxial tests were carried out on specimens of a saturated clay under no backpressure. The test data at failure are summarized: Confining Pressure (kPa) Deviator Stress (kPa) Pore Water Pressure (kPa) 150 192 80 300 341 154 450 504 222 a. Draw the Mohr circles and find the cohesion and friction angles in terms of effective stresses. b. Compute Skempton’s A-parameter at failure for all three specimens. c. Is the soil normally consolidated or overconsolidated? Why? d. Another specimen of the same clay that was consolidated under a cell pressure of 250 kPa was subjected to a consolidated, drained triaxial test. What would be the deviator stress at failure?arrow_forward
- a. A vane shear test was conducted in a saturated clay. Theheight and diameter of the rectangular vane were 4 in.and 2 in., respectively. During the test, the maximumtorque applied was 230 lb ? in. Determine the undrainedshear strength of the clay.b. The clay soil described in part (a) has a liquid limit of58 and a plastic limit of 29. What would be the correctedundrained shear strength of the clay for design purposes?Use Bjerrum’s relationship for l [Eq. (3.40a)]. Determine the overconsolidation ratiofor the clay. Use Eqs. (3.42) and (3.45). Use s9o 5 1340 lb/ft2.arrow_forwardA vane shear test was performed on saturated clay layer at the site and it is noted that a torque of 45 N-m was required to shear the soil. In order to remould the soil, the vane was rotated rapidly under the certain value of torque say "x". If the sensitivity of the clay is 8, then calculate the value of "x" in N-m. Assume diameter and length of the vane to be 70 mm and 130 mm respectively, consider two way shearing,arrow_forwardThree specimens of clay having a small air-void content were tested in the shear box. Shear loading was started immediately after the application of the normal load and was completed in 8 minutes. The results are as follows: 241 117 3 3 Normal Stress (kN/m²) 145 Shear stress at failure (kN/m²) 103 Find the apparent cohesion of the clay. 337 131 Find the angle of shearing resistance of the clay. What value of c would be obtained from an unconfined compression test on the same soil?arrow_forward
- Solve itarrow_forward1. Triaxial compression tests are done on quartzite rocks, the results are shown below. (0₁+03)/2 -964.25 14500 19575 23200 29000 43210 63075 psi (01-03)/2 964.25 14500 18850 21750 26100 35960 48575 psi Comment on the applicability of each of the Mohr-Coulomb, Griffith, and Hoek-Brown criteria for the testing results.arrow_forwardi need the answer quicklyarrow_forward
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