减压平台限制了墙后滑动面，此时滑动土体不再是一个楔体，无法采用朗肯理论、库仑理论计算土压力。
The relieving platform limits the sliding plane, and the sliding mass at this time is no longer a voussoir, so, Rankine theory and Coulomb theory cant be applied to calculate the earth pressure.
减压平台限制了墙后滑动面，此时滑动土体不再是一个楔体，无法采用朗肯理论、库仑理论计算土压力。
The relieving platform limits the sliding plane, and the sliding mass at this time is no longer a voussoir, so, Rankine theory and Coulomb theory cant be applied to calculate the earth pressure.
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