基于连续-非连续元降雨工况三维边坡稳定性分析  

Three-dimensional slope stability analysis based on continuum-discontinuum element rainfall condition

作　　者：牛犇 张新伟[2] 周玉 李婧 徐兴全 张一鸣 NIU Ben;ZHANG Xinwei;ZHOU Yu;LI Jing;XU Xingquan;ZHANG Yiming(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Beijing Institute of Geological&Prospecting Engineering,Beijing 100048,China;Institute of Mechanics,Chinese Academy of Science,Beijing 100190,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]北京市地质工程勘察院,北京100048 [3]中国科学院力学研究所,北京100190

出　　处：《山东大学学报（工学版）》2023年第1期92-99,共8页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(52178324);国家重点研发计划项目(2018YFC1505504)。

摘　　要：基于连续-非连续单元方法,引入应力场和渗流场数值耦合算法。根据兰营地区边坡地质条件建立高精度三维地质灾害模型,考虑不同降雨工况,对边坡稳定性进行分析,并与监测数据展开对比验证模型可靠性。研究表明,该边坡天然工况下安全系数为1.79,短时强降雨工况下边坡安全系数约为1.20,边坡破裂度为10.36%。经稳定性评价,该边坡在天然工况下处于基本稳定状态,在暴雨状态下处于欠稳定状态,存在一定失稳危险。Based on the continuum-discontinuum element method and the numerical coupling algorithm of stress field and seepage field, a high-precision three-dimensional geological hazard model was established according to the geological conditions of slope in Lanying area. In the calculation process, different rainfall conditions were considered to analyze the slope stability, and compared with the monitoring data to verify the reliability of the model. The study showed that the safety factor of the slope was 1.79 under natural conditions. The safety factor of the slope was about 1.20 and the slope rupture degree was 10.36% under short-time heavy rainfall condition. By stability evaluation, the slope was basically stable under natural condition and understable under rainstorm condition. The slope had a certain risk of instability.

关 键 词：连续-非连续单元法 水力耦合 降雨型滑坡 模型验证 数值模拟 

分 类 号：TU45[建筑科学—岩土工程]