黄金峡水利枢纽左岸边坡施工期变形及加固研究  

Study on deformation characteristics and reinforcement of left slope during Huangjinxia Hydropower Project construction

作　　者：王辉 唐山 杜俊慧 吴勇进[2] 张雨霆[2] WANG Hui;TANG Shan;DU Junhui;WU Yongjin;ZHANG Yuting(Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010 [2]长江科学院岩土力学与工程重点实验室,湖北武汉430010

出　　处：《水利水电快报》2024年第12期72-79,共8页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金项目(U2340226)。

摘　　要：黄金峡水利枢纽左岸边坡开挖后出现局部开裂、锚墩破裂等变形现象,影响边坡稳定,为此,对左岸边坡的地质条件进行了梳理,结合监测数据和三维计算,分析了左岸边坡变形机理,对其滑动破坏模式,采取相应的加固处理措施,并根据反演参数对边坡稳定进行了复核。结果表明:左岸边坡现状条件下块体KT24稳定性较差,已接近临界状态,抗剪洞、锚索组合的加固设计方案使KT24安全系数提高到1.51,具备一定的安全裕度。工程运行情况显示边坡整体稳定、加固措施有效,研究成果可为类似工程提供参考。Localized cracking and anchor block failure that occurred after the excavation of the left bank slope of Huangjinxia Hydropower Project,which adversely affected the slope stability.In order to addresses the above issues,a comprehensive assessment of the geological conditions of the left bank slope was conducted,integrating monitoring data and 3D numerical simulations to analyze the deformation mechanisms.Appropriate reinforcement measures were implemented in response to the identified sliding failure modes.Re-evaluation of slope stability based on inverse parameters indicated that under current conditions,the stability of block KT24 was insufficient and approached a critical state.The reinforcement design that combining shearing-resistance tunnel and anchor cable raising the safety factor of KT24 to 1.51,thereby ensuring a satisfactory safety margin.Operational assessments demonstrated overall slope stability and the effectiveness of reinforcement measures.The research resultscan provide a reference for similar engineering projects.

关 键 词：高边坡 变形机制 加固处理 黄金峡水利枢纽 

分 类 号：TV223[水利工程—水工结构工程]