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.
利用沟槽坍塌时滑动土体的宽度表达式得到的挖掘机荷载影响区划分图，直观地给出挖掘机荷载的影响区和非影响区。
The division of influence area of machinery load was given by the expression width of for sliding soil body, and the influence area and non-influence area were visually represented.
利用沟槽坍塌时滑动土体的宽度表达式得到的挖掘机荷载影响区划分图，直观地给出挖掘机荷载的影响区和非影响区。
The division of influence area of machinery load was given by the expression width of for sliding soil body, and the influence area and non-influence area were visually represented.
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