摘要
在复杂的三维土工结构稳定分析时,很难将其简化成二维模型计算,目前只能在三维建模分析时采用强度折减法计算整个结构的安全系数。但当桩用弹性模型时,不管桩数多少,也即不管实际布桩是否能够满足抗剪要求,滑动带始终都是通过桩端,在桩数不足时这种算法很容易失真且计算的安全系数偏大。针对简单纯岩土边坡及设置不同数量的抗滑桩等多种工况,通过对比分析极限平衡法、二维和三维强度折减法计算的安全系数,得出一些有益的结论,可为复杂三维结构的安全性计算评估提供参考。
It is difficult to simplify three-dimensional model into two-dimensional model when analyzing the stability of complex three-dimensional geotechnical structure.At present,only the strength reduction method can be used to calculate the safety factor of the whole structure in the three-dimensional modeling analysis.But when the pile is elastic model,no matter how many piles,that is,whether the actual piles can meet the shear requirements,the sliding belt is always through the end of the pile.When the number of piles is insufficient,the algorithm is easily distorted and the calculated safety factor is too large.Aiming at various working conditions such as the simple pure rock soil slop and setting different number of anti slide piles,some useful conclusions are drawn by comparing the safety factors calculated by the limit equilibrium method,two-dimensional and three-dimensional strength reduction method,which can provide reference for the safety calculation and evaluation of complex three-dimensional structures.
作者
魏芸
袁琳
WEI Yun;YUAN Lin(CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)
出处
《中国港湾建设》
2020年第10期1-4,共4页
China Harbour Engineering
基金
国家重点研发计划(2016YFC0802204)。
关键词
安全系数
强度折减法
极限平衡法
边坡
稳定
safety factor
strength reduction method
limit equilibrium method
slope
stability
