【摘要】 考虑土钉对土质边坡稳定性影响的情况下,根据土体边坡滑动面的破坏模式,拟静力法,建立了地震作用下土钉支护边坡稳定性模型,推导了边坡滑移面圆心位置与稳定系数之间的函数关系。在水平地震作用下,竖向条分在计算地震惯性力和抗滑力矩时存在计算上的不合理,从而使地震惯性力与实际值有误差,抗滑力矩偏小,因此采用竖向条分和水平条分结合的方法对土钉支护边坡地震稳定性分析方法进行了改进。利用遗传算法对最危险滑移面的圆心进行动态搜索,并且避免了在圆弧搜索中陷入局部最小值的缺点。采用面向对象程序设计语言VC++编制了程序,实现了上钉支护边坡稳定最小安全系数的自动寻优。最后结合具体工程实例进行了验算,结果表明这种计算方法对土质较均匀的黄土地区是适用的。更多还原

【Abstract】 Considering soil nailing effects on stability of a soil side-slope,according to the damage model of its slip surface,the limit equilibrium theory and the pseudo static approach,its seismic stability model and a searching model of its most dangerous slip surface were set up.The function relationship between stability coefficient and the center of its circular slip surface was derived.Errors should be induced in calculating horizontal seismic inertial force and anti-sliding moment according to vertical slice.The seismic stability analysis method of the slope protected by soil sailing was improved using horizontal and vertical slice methods.Calculation of the stability of the slip surface was carried out using genetic algorithms.It could avoid getting in local minimum in optimal searching.Using object-oriented programming language VC++,a computing program was made to realize the optimization.Finally,the method was used to a case study.The results showed the proposed method is credible.更多还原