You are designing a cantilevered concrete wall to raise a highway above a newly designated flood elevation. The ultimate bearing capacity of the native soil was determined to be 9,000 psf. a. How far must the base of the wall extend back from the stem to provide a factor of safety of at least 1.5 for both sliding and overturning? Use Rankine theory and report the required total width of the foundation $B$ . b. Will a factor of safety of 2.5 for bearing capacity be satisfied using the required width, $B$ , needed for sliding and overturning?

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You are designing a cantilevered concrete wall to raise a highway above a newly designated flood elevation. The ultimate bearing capacity of the native soil was determined to be 9,000 psf. a. How far must the base of the wall extend back from the stem to provide a factor of safety of at least 1.5 for both sliding and overturning? Use Rankine theory and report the required total width of the foundation

B

. b. Will a factor of safety of 2.5 for bearing capacity be satisfied using the required width,

B

, needed for sliding and overturning?

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