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Review_4-Part-A - Review#4 Part A 1 For the retaining wall...

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Review #4 Part A
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1. For the retaining wall shown below, determine the force per unit length of the wall for Rankine’s acAve state and the locaAon of the resultant. Pa = 116.81kN/m
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2. A retaining wall that has a soH, saturated clay backfill is shown below. For the undrained condiAon of the backfill, determine Pa aHer the tension crack occurs and is filled with water..
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3. For the retaining wall shown below, determine the acAve force per foot of wall and its point of applicaAon.
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Uniform Vertical Surcharge A uniform vertical surcharge, q v , increases the vertical stress at all points in the soil behind the wall. The horizontal plane remains a principal plane (no shear stress) and the principal stress in the previous Mohr's circles simply increases. (Remember that the vertical stress is σ 1 for the active condition and σ 3 for the passive condition.) The active and passive stress calculations by Rankine still apply with: Active : at z = 0: at z = H: Passive : at z = 0: at z = H
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Point Load Surcharge
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