高地应力软岩隧道衬砌开窗应力释放技术研究  

Research on Stress Release Technology for Lining Window Opening in High Stress Soft Rock Tunnels

作　　者：李达强 杨朝帅 Li Daqiang;Yang Chaoshuai(China Railway Tunnel Group Co.,Ltd.,Guangzhou,China;Guangdong Provincial Key Laboratory of Intelligent Monitoring and Maintenance of Tunnel Structure,Guangzhou,China;China Railway Tunnel Consultants Co.,Ltd.,Guangzhou,China)

机构地区：[1]中铁隧道局集团有限公司,广东广州 [2]广东省隧道结构智能监控与维护企业重点实验室,广东广州 [3]中铁隧道勘察设计研究院有限公司,广东广州

出　　处：《科学技术创新》2025年第1期136-140,共5页Scientific and Technological Innovation

摘　　要：高地应力软岩隧道容易发生大变形侵限、衬砌开裂、塌方等工程灾害。为解决高地应力软岩隧道大变形问题,提出一种衬砌先开窗卸压,稳定后封闭的应力释放方法,并通过中义隧道现场试验验证了该方法的有效性。试验结果表明:中义隧道赋存较大水平地应力,监控量测水平收敛值大于拱顶沉降值,隧道水平向挤压变形明显;在水平构造应力影响下,隧道边墙产生较大正向应力,边墙处拱架压弯、衬砌开裂风险极高;边墙处开窗可有效释放水平向应力,显著降低围岩变形和衬砌承受荷载。High stress soft rock tunnels are prone to engineering disasters such as large deformation,lining cracking,and collapse.To solve the problem of large deformation in high stress soft rock tunnels,a stress release method with lining first opening windows to relieve pressure,stabilizing and then closing is proposed.The effectiveness of this method has been verified through on-site tests in Zhongyi Tunnel.The experimental results show that the Zhongyi Tunnel exhibits significant horizontal ground stress,and the convergence value of monitoring and measurement is greater than the settlement value of the arch crown.The horizontal compression deformation of the tunnel is significant;Under the influence of horizontal structural stress,the tunnel sidewall generates significant positive stress,and the risk of arch bending and lining cracking at the sidewall is extremely high;Opening windows at the side walls can effectively release horizontal stress,significantly reducing the deformation of surrounding rock and the load-bearing capacity of the lining.

关 键 词：高地应力 应力释放 围岩大变形 隧道稳定性 

分 类 号：U452.27[建筑科学—桥梁与隧道工程]