叶巴滩水电站高拱坝基础地质缺陷分析及加固处理措施研究  

Analysis and Reinforcement Treatment of Geological Defects in the Foundation of the High Arch Dam of Yebatan Hydropower Project

作　　者：夏勇 赵恒 祝海霞 刘露 XIA Yong;ZHAO Heng;ZHU Haixia;LIU Lu(Yebatan Branch,Huadian Jinsha River Upstream Hydropower Development Co.,Ltd.,Chengdu Sichuan 610041;PowerChina Chengdu Engineering Corporation Limited,Chengdu Sichuan 610072)

机构地区：[1]华电金沙江上游水电开发有限公司叶巴滩分公司,四川成都610041 [2]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：《四川水力发电》2025年第1期112-117,共6页Sichuan Hydropower

摘　　要：高拱坝坝基地质缺陷处理是拱坝建基面设计中的重要环节,需要通过计算分析得到经济合理的基础地质缺陷处理措施以保障大坝安全。文章以叶巴滩水电站高拱坝基础地质缺陷F_(2)断层为例,系统研究了F_(2)断层的地质特性,采用三维有限元法开展了拱坝坝基F_(2)断层混凝土置换及灌浆效果分析,研究了水泥-化学复合灌浆的宽度和深度对坝基变形的影响。计算结果表明,在F_(2)断层影响下坝基坝踵需采取混凝土置换块、水泥-化学复合灌浆等处理措施,可有效减小坝基不均匀沉降变形。根据三维有限元计算分析成果,开展了坝基F_(2)断层“混凝土置换+水泥-化学复合灌浆”综合加固处理措施设计。The treatment of geological defects in the foundation of high arch dams is an important part of the design of arch dam foundation surfaces,and it is necessary to obtain economic and reasonable measures for the treatment of geological defects in the foundation through calculation and analysis to ensure the dam safety.Taking the geological defect F_(2) fault of the high arch dam foundation of the Yebatan Hydropower Project as an example,this paper systematically studied the geological characteristics of the F_(2) fault.The three-dimensional finite element method was used to analyze the concrete replacement and grouting effect of the F_(2) fault of the arch dam foundation,and the influence of the width and depth of cement-chemical composite grouting on the deformation of the dam foundation was studied.The results show that under the influence of the F_(2) fault,the dam foundation and heel need to take treatment measures such as concrete replacement blocks and cement-chemical composite grouting,which can effectively reduce the uneven settlement and deformation of the dam foundation.According to the results of three-dimensional finite element calculation and analysis,the design of"concrete replacement+cement-chemical composite grouting"comprehensive reinforcement measures for the F_(2) fault in the dam foundation was carried out.

关 键 词：高拱坝 地质缺陷 三维有限元法 混凝土置换 水泥-化学复合灌浆 

分 类 号：TV642.4[水利工程—水利水电工程] O242.21[理学—计算数学]