土钉抗弯剪能力分析

Analysis on bending and shearing capability of soil nails

通过应力分析,将土钉的抗弯剪能力对被加固基坑边坡稳定安全系数的影响视为加固区土体有效容重的减小,采用数值模拟FLAC程序对不同坡高的基坑土钉墙在考虑和不考虑土钉的抗弯剪作用下的稳定安全系数进行数值计算与对比.结果表明,在常规土钉墙支护深度范围内,土钉抗弯剪作用能较明显地提高基坑边坡稳定安全系数.

Considering the ability of resistance to bending and shearing of soil nailing, this paper used the method of stress analysis to re - estimate the safety factor of the pit in different heights. It regarded this kind of influence as the reducing of effective unit weight of soil body of strengthening area. After a series of height of the program of numerical analysis and contrast, it draw the conclusion that： if the depth of pit range is in the routine, the influence to safety factor of the ability of resistance to bending and shearing of soil nailing is obviously.