极限平衡理论下边坡稳定性抗滑强度参数反演分析

发布时间：2018-11-18 08:50

【摘要】：抗滑强度参数的取值对正确评估边坡稳定性有着重要影响,而参数反演是快速准确获取边坡抗滑强度参数的一种有效方法。基于边坡稳定性分析结果和滑动面抗滑强度参数与临界滑动面一一对应的关系,建立抗滑强度参数与边坡安全系数之间2个特定关系式;由此,在给定临界滑动面的安全系数或某一强度参数时,即可求解反演结果。为了便于计算,考虑多种因素影响,采用极限平衡瑞典法进行稳定性分析,并基于临界圆弧滑动面的判别,推导出参数反演的显示表达式。经算例对比分析,验证了该方法的可行性,且简单适用。同时,参数影响研究分析表明,临界滑动面上的监测点位间距越大,其点位位置误差对反演强度参数的影响越小。最后,将方法应用于工程实例当中,说明了该方法的实用性。
[Abstract]:The value of anti-slip strength parameters has an important influence on the evaluation of slope stability, and parameter inversion is an effective method to obtain slope anti-slide strength parameters quickly and accurately. Based on the results of slope stability analysis and the one-to-one relationship between the slip strength parameters and the critical slip surface, two specific relations between the slip strength parameters and the slope safety factor are established. Therefore, the inversion results can be obtained when the safety factor or a strength parameter of the critical slip surface is given. In order to facilitate calculation and consider the influence of many factors, the stability analysis is carried out by using the limit equilibrium Swedish method. Based on the discrimination of critical arc sliding surface, the display expression of parameter inversion is derived. The feasibility of the method is verified by comparison and analysis of a numerical example, and the method is simple and applicable. At the same time, the analysis of the influence of parameters shows that the greater the distance between the monitoring points on the critical sliding surface, the smaller the effect of the position error on the inversion strength parameters. Finally, the method is applied to an engineering example to illustrate the practicability of the method.
【作者单位】：中南大学土木工程学院;
【基金】：国家自然科学基金项目(51608541) 中国博士后科学基金面上项目(2015M580702) 贵州省交通运输厅科技项目(2010-122-020,2014-122-006)
【分类号】：TU43

【相似文献】