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桩锚支护边坡体系受力复杂,目前一些基础理论研究仍然不甚清楚,已远远滞后于工程实践,尤其是在抗震设计方面。一些桩锚支护边坡中对于锚索长度的选取没有一个可靠的理论基础,通过实际工程对比FLAC~(3D)数值模拟提出一套在地震力作用下,桩锚支护体系锚索的轴力分布,得出对特定地质条件下的锚索极限锚固长度的计算方法,现场实测数据与计算结果接近,表明该方法具有一定的适用性,并且该方法所涉及方程简单,求解容易,更便于工程师在地震条件下设计应用。
The pile-anchor supporting slope system has complicated forces. At present, some basic theoretical researches are still not clear, which lags far behind engineering practice, especially in seismic design. There is no reliable theoretical basis for the selection of the length of anchor cable in the pile-supported slope. Through the comparison of FLAC 3D numerical simulation with practical engineering, Force distribution, the method to calculate the ultimate anchorage length of anchorage cable under certain geological conditions is obtained. The field measured data are close to the calculated ones, which shows that the method has some applicability. The method is easy to solve and easy to solve Engineers design applications under seismic conditions.