Questions from Geotechnical Engineering

Q: The shear strength of a normally consolidated clay can be given by

The shear strength of a normally consolidated clay can be given by the equation f = ’ tan 27°. Following are the results of a consolidated-undrained test on the clay. Chamber-confining pressure = 15...

Q: If a consolidated-drained test is conducted on the clay specimen

If a consolidated-drained test is conducted on the clay specimen of Problem 13.15 with the same chamberconfining pressure of 150 kN/m2 , what would be the deviator stress at failure?

Q: A consolidated-undrained triaxial test was conducted on a dense sand

A consolidated-undrained triaxial test was conducted on a dense sand with a chamber-confining pressure of 20 lb/in2 . Results showed that ’ = 24° and  = 31°. Determine the deviator stress and the po...

Q: Undisturbed samples from a normally consolidated clay layer were collected during a

Undisturbed samples from a normally consolidated clay layer were collected during a field exploration program. Drained triaxial tests showed that the effective friction angle at ’ = 28°. The unconfin...

Q: Results of two consolidated-drained triaxial tests on a clayey soil

Results of two consolidated-drained triaxial tests on a clayey soil are as follows. Using the failure envelope given in Example 13.18 (q’ =  1 p’...

Q: Consider the specimen in Problem 13.1b. What are

Consider the specimen in Problem 13.1b. What are the principal stresses at failure? What is the inclination of the major principal plane with the horizontal?

Q: A 15 m thick normally consolidated clay layer is shown in Figure

A 15 m thick normally consolidated clay layer is shown in Figure 13.63. The liquid limit and plastic limit of the soil are 39 and 20, respectively. Using Eq. (13.53) given by Skempton (1957), estimat...

Q: Refer to the clay soil in Figure 13.63. If

Refer to the clay soil in Figure 13.63. If the natural moisture content is 28%, estimate the undrained shear strength of remolded clay using the relationships given in Table 13.5 by Leroueil et al. (...

Q: Refer to Problem 3.18. Given that the borrow pit

Refer to Problem 3.18. Given that the borrow pit has a moisture content of 11% and Gs = 2.7, determine: Moist unit weight of the borrow soil Degree of saturation of the borrow soil Moist unit weigh...

Q: For a dry sand specimen in a direct shear test box,

For a dry sand specimen in a direct shear test box, the following are given. Size of specimen: 2.5 in. ×2.5 in. × 1.25 in. (height) Angle of friction: 33° Normal stress: 28 lb/in2 Determine the sh...