摘要
反分析是获取边坡计算强度参数的重要方法。基于极限分析上限法原理和Mohr-Coulomb破坏准则,建立了边坡的对数螺旋破坏机构,分别推导得到了边坡的外力做功功率的表达式及边坡内部的能量耗散功率的表达式,并结合强度折减法求得安全系数。求得不同黏聚力c以及内摩擦角φ下的安全系数变化情况。根据计算结果,得到安全系数为1时的c—φ曲线,并进行参数反演。所得结果表明,此方法是可靠有效的。
Back analysis is the important method for obtaining the calculated strength parameter.Based on the limit analysis and Mohr-Coulomb criterion,the log-spiral failure mechanism of slope is conducted.The formulations of external work rate and internal energy dissipation of soil is derived.With the strength reduction method,the safety factor of the slope is obtained.The variation of cohesion c and friction angle φ with the safety factor is calculated.On this basis,the curve of c-φ is gained when safety factor equals to 1,and the back analysis is preformed.The result shows this method is effective.
出处
《公路工程》
北大核心
2012年第6期125-126,213,共3页
Highway Engineering
关键词
边坡工程
反分析
安全系数
破坏机构
slope engineering
back analysis
safety factor
failure mechanism
