叶巴滩高拱坝坝肩稳定分析及其加固效果评价  

Stability analysis of Yebatan high arch dam abutment and evaluation of its reinforcement effect

作　　者：张芮瑜 陈媛[1,2] 张林[1,2] 刘子安 杨宝全[1,2] 董建华[1,2] 张冲 ZHANG Ruiyu;CHEN Yuan;ZHANG Lin;LIU Zian;YANG Baoquan;DONG Jianhua;ZHANG Chong(State Key Lab.of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China;PowerChina Chengdu Engineering Co.Ltd.Chengdu 610072,China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]四川大学水利水电学院,四川成都610065 [3]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《人民长江》2021年第1期122-128,共7页Yangtze River

基　　金：国家重点研发计划资助项目(2016YFC0401908);国家自然科学基金项目(51609163)。

摘　　要：叶巴滩高拱坝地质条件复杂,坝体与坝肩的稳定安全问题突出,工程安全性评价及加固处理方案的确定至关重要。采用数值计算分析了叶巴滩拱坝在天然地基条件下的坝肩稳定,并针对揭示的薄弱环节提出加固措施。对加固后的拱坝进行有限元计算及三维地质力学模型试验,综合评价坝肩整体稳定安全性及加固措施的有效性。研究结果表明:天然地基条件下的坝体与坝肩变位较大,并呈现明显左右不对称特性,拱端附近发育的软弱结构面相互错动,对坝肩稳定起控制性作用。坝肩主要结构面加固后,坝体及坝肩变位减小,对称性得到明显改善,坝肩承载力及稳定性得到有效提高,表明所采取的处理措施对拱坝受力变形和坝肩稳定起到良好的加固作用。The complex geological conditions of Yebatan high arch dam make its stability and safety issues concerned,which is a core problem for safety evaluation and reinforcement solution.Based on the finite element calculation,we analyzed the stability of the abutment under natural foundation condition,and accordingly proposed reinforcement measures for the weak parts.By numerical and experimental analysis,the stability and safety of the abutment and the effectiveness of the reinforcement measures were analyzed.The results showed that the arch dam and both abutments had large displacements under natural foundation,presenting obvious asymmetrical displacement on both abutments,and the structural planes near the abutment were mutually displaced,proposing a dominated control on abutment stability.After reinforced,the displacement of both abutment and foundation decreased,with the displacement symmetry significantly improved.The research results showed that reinforcement measures for structural planes had a good effect on the deformation of the arch dam and the stability of the abutment.

关 键 词：高拱坝 坝肩稳定 数值计算 地质力学模型 叶巴滩拱坝 

分 类 号：TV[水利工程]