Redo Problem 19.6, using Eq. (19.19) and assuming a smooth excavation base with N c = 5.14.

Question:

Redo Problem 19.6, using Eq. (19.19) and assuming a smooth excavation base with Nc = 5.14.


Problem 19.6

For Problem 19.1, determine the factor of safety against bottom heave. Use Eq. (19.20) suggested by Chang (2000), assuming a smooth base for the excavation. There is no stiff stratum or bedrock in the vicinity of the bottom of the excavation, which is very long.


Eq. (19.20)

0.2B


Problem 19.1

A 5 m wide braced excavation is made in a saturated clay, as shown in Figure P19.1, with the following properties: c = 20 kN/m2, ϕ = 0, and γ = 18.5 kN/m3. The struts are spaced at 5 m center to center in plan.

a. Determine the strut forces.

b. Determine the section modulus of the sheet pile required, assuming σall = 170 MN/m2.

c. Determine the maximum moment for the wales at levels B and C.


Figure P19.1

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Principles Of Foundation Engineering

ISBN: 9781337705028

9th Edition

Authors: Braja M. Das, Nagaratnam Sivakugan

Question Posted: