Refer to Problem 3.16. Estimate the overconsolidation ratio of the clay. Use Eqs. (3.42) and (3.43).

Eqs. (3.42)

Eqs. (3.43)

Problem 3.16.

Refer to Figure P3.3. Vane shear tests were conducted in the clay layer. The vane (tapered) dimensions were 63.5 mm (d) × 127 mm (h), i_B = i_T = 45° (see Figure 3.23). For the test at A, the torque required to cause failure was 51 N ∙ m.

For the clay, given: liquid limit = 46 and plastic limit = 21.

Estimate the undrained cohesion of the clay for use in the design by using Bjerrum’s λ relationship [Eq. (3.40a)].

Figure P3.3

Eq. (3.40a)

Transcribed Image Text:

Culfield) OCR = B-