摘要
在深埋云母片岩地层中,隧道的锚杆支护结构常发生失效,进而引发围岩大变形问题,威胁隧道施工安全和结构的可靠度。文章采用现场试验及数值计算相结合的手段,分析了云母片岩地层隧道围岩的应力应变特征和松动圈形态,研究了片岩地层中锚-岩复合体的应力关系和失效特征,可为云母片岩及层状各向异性岩体地层隧道支护方案设计、围岩变形控制及减灾避灾提供参考。
In a deep mica schist stratum, the anchor bolt support structure of a tunnel will frequently fail, resulting in large surrounding-rock deformation and endangering the safety of tunnel construction and reliability of the structure. Combining field experiments and numerical calculations, the characteristics of stress-strain and forms of loosening circles around a tunnel in a mica schist stratum are analyzed and the stress relationship and failure characteristics of the anchor-rock complex in a mica schist stratum are studied, providing a reference for support design, rock deformation control, and disaster prevention in mica schist and stratified anisotropic rock masses.
出处
《现代隧道技术》
EI
北大核心
2014年第4期39-45,共7页
Modern Tunnelling Technology
基金
国家自然科学基金项目(No.41202201)
中央高校基本科研业务费专项资金项目(CUGL110215)
关键词
公路隧道
云母片岩
砂浆锚杆
大变形
失效机制
Highway tunnel
Mica schist
Mortar anchor
Large deformation
Failure mechanism
