Principles of Foundation Engineering (MindTap Course List)
Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 13, Problem 13.2P

a.

To determine

Find the load carrying capacity at the base using Chen and Kulhawy method.

b.

To determine

Find the load carrying capacity at the base using Berezantzev et al. method.

c.

To determine

Find the load carrying capacity of the shaft assuming δ'ϕ'=0.9.

d.

To determine

Find the maximum allowable load on the shaft.

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Refer to Figure 11.26b. For the drilled shaft with bell, given:Thickness of active zone, Z = 9 mDead load = 1500 kN Live load = 300 kNDiameter of the shaft, Ds = 1 mZero swell pressure for the clay in the active zone = 600 kN/m2Average angle of plinth-soil friction, Φ'ps = 20°Average undrained cohesion of the clay around the bell = 150 kN/m2. Determine the diameter of the bell, Db. A factor of safety of 3 against uplift is required with the assumption that dead load plus live load is equal to zero.
A free-headed drilled shaft, shown in Figure 4, has an elastic modulus, Ep = 20,000 MPa. M, = 880 kN m Q = 245 kN, Sand at = 19 kN/m3 O' = 34° 1.2 m Figure 4 (a) Determine the ground line deflection, x.
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