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Question 14.3: In Example 14.2, if there is a possibility that the soil in ...

In Example 14.2, if there is a possibility that the soil in front of the wall will be removed sometime later, neglect the passive resistance and compute the factors of safety.

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The passive resistance P_p was not considered in computing FS_{(overturning)}, which remains unchanged at 4.62. However, neglecting P_p will reduce FS_{(sliding)}, which becomes
FS_{(sliding)}=\frac{\left(\sum V\right)\tan \delta^\prime+P_p}{P_h}=\frac{475.4\times \tan 23.3 +0.0}{113.4}= 1.81
The FS_{(bearing  capacity)} remains the same at 7.4.

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