大型地下厂房变形综合评估方法研究  

Study on the comprehensive evaluation method for the deformation ofa huge underground powerhouse

作　　者：何江 谢国新 高要辉 喻军[3] HE Jiang;XIE Guoxin;GAO Yaohui;YU Jun(Power China Huadong Engineering Co.,Ltd.,Hangzhou 311122,China;China Energy Changyuan Shiyan Hydropower DevelopmentCo.,Ltd.,Shiyan 442326,China;College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]国能长源十堰水电开发有限公司,湖北十堰442326 [3]浙江工业大学土木工程学院,浙江杭州310023

出　　处：《浙江工业大学学报》2024年第4期450-456,共7页Journal of Zhejiang University of Technology

基　　金：中国博士后科学基金资助项目(2021M69000)。

摘　　要：地下厂房围岩稳定性是大型水电站工程建设的关键问题之一,基于数值分析法、经验公式法、工程实例统计法和工程类比分析法评估地下厂房变形允许值及其稳定性。锦屏二级水电站地下厂房变形原位测试与变形综合评估的对比结果表明:地下厂房开挖支护完成后围岩不同部位非协调变形现象显著,上游边墙中部到上游岩锚梁范围围岩变形最大,其次为下游边墙下部位置,顶拱变形普遍较小;地下厂房变形值适中,整体稳定性较好。此外,大型地下厂房围岩变形与围岩类别、地应力水平、洞室宽度及高度等呈正相关。研究成果可为大型水电地下工程稳定性分析和设计优化提供参考。The surrounding rock stability of underground powerhouses is very important for the engineering construction of a huge hydropower station.The numerical analysis method,empirical formulae,engineering case statistics,and the engineering analogy analysis method are introduced to evaluate the allowable deformation and stability of a underground powerhouse.The comparison between in-situ deformation monitoring and comprehensive assessment in JinpingⅡhydropower station shows that there is a displacement discrepancy in different parts of the surrounding rock after the excavation and support of the underground powerhouse.The largest deformation of the surrounding rock occurs from the middle part to the anchor beam of the upstream side wall,followed by the lower part of the downstream sidewall.The deformation of the top arch is generally small.The deformation of the underground powerhouse is moderate,which indicates that the underground powerhouse is overall stable.In addition,the deformation of the surrounding rock of a large underground powerhouse is positively correlated with the surrounding rock type,the ground stress level,cavern width and height.The research results can provide a reference for the stability analysis and design optimization of large-scale underground hydropower projects.

关 键 词：地下厂房 变形估计 非协调变形 稳定性分析 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]