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Example 20.18 Fig. Ex. 20.18a gives the section of a long braced cut. The sides are supported by steel sheet pile walls with struts and wales. The soil excavated at the site is stiff clay with the following properties

c = 800 Ib/ft2, l/J = 0, r = 115 Ib/ft3

Determine: (a) The earth pressure distribution envelope. (b) Strut loads. (c) The maximum moment of the sheet pile section.