对计算复合土钉支护整体稳定性的圆弧滑动法的改进

对计算复合土钉支护整体稳定性的圆弧滑动法进行的改进，一是考虑到滑裂面不再是一个完整的圆弧，滑动区和坑底的圆弧不具有相同的圆心和半径；二是考虑到基坑土层初始应力的影响。根据该思想计算了大量实例，并且将其与未改进的方法做比较，得出使用改进方法的稳定系数下限值。

Try to improve the slice method emploved to calculate the stability of compound soil nail retaining walls

This article aims to introduce a new idea to improve the slice method employed to calculate the stability of compound soil nail retaining walls. Two part of the traditional method is ameliorated to accommodate the real situation. One of the improvement is to take it into consideration that the failure surface is not an in- tact circle. Another is to take the initial in-site ground stress into account. And a computer program co- ded on the new method is employed to make the idea applicable. In addition, by calculating amounts of examples a down bound stability coefficient is recommended to design the compound soil nail retaining walls.