四川水力发电2026，Vol.45Issue(1)：48-52,77,6.DOI:10.20196/j.cnki.scslfd.20260110
某电站尾水洞软岩地层冒顶原因分析及施工防控建议
Analysis of roof collapse causes and construction prevention&control suggestions for soft rock strata in the tailrace tunnel of a hydropower project
李秋娴 1张长平 1梁勇 1徐明东1
作者信息
- 1. 四川省清源工程咨询有限公司,四川 成都 610000
- 折叠
摘要
Abstract
Taking the tunnel collapse and roof fall accident in the 0+938～0+950 section of the tailrace tunnel of Bala Hydropower Project as the research object,this paper systematically explores the inducing factors and formation mechanism of tunnel roof falls in soft rock strata through on-site investigation,geological data analy-sis,and construction process retrospective analysis.The research shows that the coupled effect of multiple fac-tors,including the physical and mechanical defects of soft rock,complex geological structures and hydrological conditions,construction disturbance,and external seismic forces,ultimately leads to tunnel instability,roof fall,and surface subsidence.Based on the research conclusions,targeted prevention and control suggestions are pro-posed,which can provide a reference for the safe construction of similar tunnel projects in soft rock strata.关键词
炭质板岩/尾水隧洞/冒顶成因/地质条件/施工防控Key words
carbonaceous slate/tailwater tunnel/causes of roof fall/geological conditions/construction preven-tion and control分类
建筑与水利引用本文复制引用
李秋娴,张长平,梁勇,徐明东..某电站尾水洞软岩地层冒顶原因分析及施工防控建议[J].四川水力发电,2026,45(1):48-52,77,6.
