忽略填土与基底的摩擦系数和填土内摩擦角之间的互相关性，则加筋土挡墙的抗滑验算偏于危险；
The anti-slide reliability is reduced when the positive correlation among the friction coefficient between fill and ground and the friction angle of fill is applied.
推导了在获得相同抗滑效果的前提下，使得锚索长度最短的最优锚固角公式；
Secondly, the optimum dip angle formula, which makes total length of the cables to be the shortest under the condition of obtaining the same anti-sliding effectiveness, is deduced.
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