李家岩水库导流泄洪放空洞进水口边坡支护方案三维有限元模拟  

3D finite element numerical analysis of slope stability at intake of diversion and flood discharge tunnel of Lijiayan Reservoir

作　　者：何杨 张志强 向勇 HE Yang;ZHANG Zhiqiang;XIANG Yong(Sichuan Water Conservancy Planning and Research Institute,Chengdu 610000,China;College of Water Resources and Hydropower,Xi′an University of Technology,Xi′an 710000,China;Sichuan Water Conservancy and Hydropower Survey and Design Research Institute Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]四川省水利规划研究院,四川成都610000 [2]西安理工大学水利水电学院,陕西西安710000 [3]四川省水利水电勘测设计研究院公司,四川成都610000

出　　处：《水利水电快报》2023年第12期48-53,共6页Express Water Resources & Hydropower Information

摘　　要：李家岩水库导流泄洪放空洞进水口工程边坡最大高度达110 m,进口边坡地质条件复杂,岩层间结合力差,边坡稳定问题突出。针对李家岩水库导流泄洪放空洞进水口边坡工程特点,在开挖过程中结合地质条件及施工方法等因素综合设计边坡支护方案,基于三维有限元方法计算,并充分考虑边坡的整体效应,根据各项位移和应力结果对边坡支护方案进行了优化和边坡稳定性分析。结果表明:按照优化后的设计方案支护,边坡岩体整体稳定,支护结构总体安全,安全系数满足规范要求。The maximum height of the slope at the inlet of the diversion and flood discharge tunnel of Lijiayan Reservoir was 110 m.The geological conditions of the inlet slope were complex,and the bonding force between rock layers was poor,resulting in the instability of the slope.According to the characteristics of the Lijiayan diversion and flood discharge tunnel inlet slope project,the slope support was comprehensively considered during the excavation process,taking into account the geological conditions and construction methods.By using the three-dimensional finite element method,the overall effect of the slope can be fully considered.Based on the displacement and stress results,the support structure was optimized and the slope stability was analyzed.The results showed that the overall stability of the slope rock mass,the overall safety of the support structure,and the safety factor of the optimized design plan met the requirements of specifications.

关 键 词：边坡支护 三维有限元 进水口 导流泄洪放空洞 李家岩水库 

分 类 号：TV65[水利工程—水利水电工程]