基于刚体极限平衡法和离散元法的某水电工程岩质边坡综合处理措施  

Comprehensive Treatment Measures for Rock Slopes of a Hydropower Project Based on Rigid Body Limit Equilibrium Method and Discrete Element Method

作　　者：张帆[1] 王明疆[1] 刘永智[1] ZHANG Fan;WANG Mingjiang;LIU Yongzhi(Powerchina Northwest Engineering Corporation Limited,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065

出　　处：《西北水电》2020年第S01期15-21,共7页Northwest Hydropower

摘　　要：水电工程边坡稳定对项目建设及运行安全至关重要,岩质边坡受结构面类型、产状、规模、连通率及其组合影响,使其稳定性分析更加复杂。本文以某电站坝址左岸边坡为例,分析了边坡倾倒滑移的变形机制,采用刚体极限平衡法得到抗滑稳定安全系数,并进一步采用离散元法对变形规律进行了深入研究,2种方法相互验证,确保了稳定分析成果合理可靠。通过深部排水、预应力锚固和混凝土抗剪洞等综合措施进行加固处理,监测成果表明,该边坡变形趋于收敛,边坡整体稳定。Slope stability of hydropower projects is crucial to the safety of project construction and operation.Rock slopes are affected by structural plane types,occurrences,scales,connectivity rates and their combinations,making stability analysis more complicated.Taking the left bank slope of a hydropower station as an example,the deformation mechanism of the slope toppling and slipping is analyzed,the rigid body limit equilibrium method is used to obtain the anti-sliding stability safety factor,and further uses the discrete element method to conduct an in-depth study on the deformation law.The mutual verification of these methods ensures that the results of stable analysis are reasonable and reliable.Comprehensive measures such as deep drainage,pre-stressed anchorage and concrete shear-resistant tunnels have been taken for reinforcement.The monitoring results show that the deformation of the slope tends to converge,and the overall slope is stable.

关 键 词：岩质边坡 倾倒滑移 刚体极限平衡法 离散元法 

分 类 号：TU457[建筑科学—岩土工程]