Calculate the minimum depth of embedment, d, to provide stability to a cantilever sheet pile wall, retaining an excavated depth of 5 m using:

The soil properties are 0'peak = 30°, c' = 0, 7 = 20kN/m3. Solution

(a) BS 8002 method

In accordance with the methods set out in BS 8002, we apply a surcharge of 10kN/m2, and allow for a future unplanned excavation of 10 per cent of the clear height (= 0.5 m) in front of the wall (Fig. 7.9a). The pressure distribution is then as shown in Fig. 7.9b.

Ws = 10kN/ma lllllllllll

(a) Wall geometry (b) Pressure distributions
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