软弱围岩隧道衬砌结构参数优化研究  

Optimization of Structural Parameters for Tunnel Lining in Weak Surrounding Rock

作　　者：林汐 张兆华 LIN Xi;ZHANG Zhaohua(Qinghai Huangyuan Highway Engineering Construction Co.,Ltd.,Xining Qinghai 810000,China)

机构地区：[1]青海省湟源公路工程建设有限公司,青海西宁810000

出　　处：《石家庄铁路职业技术学院学报》2024年第4期55-59,共5页Journal of Shijiazhuang Institute of Railway Technology

摘　　要：针对隧道建成后二衬分配荷载较大,出现混凝土开裂,甚至掉块等普遍存在的问题,以药草台隧道工程为例,运用ANSYS数值计算软件建立荷载-结构模型,对Vb型衬砌类型的不同二衬厚度条件下进行结构安全性检算。结果表明:减薄二衬厚度对于改善二衬受力状态有明显作用,二衬厚度从原设计值50 cm减少到30 cm时,二衬结构安全系数仍满足规范要求,二衬有进一步优化减薄的空间。To address common issues such as large secondary lining load distribution,concrete cracking,and spalling in tunnels after completion and other common problems,this study takes the Yaocaotai tunnel project as an example.Using ANSYS numerical computation software,a load-structural model was established to assess structural safety under different secondary lining thickness conditions for Type Vb linings.The results show that thinning the thickness of the second lining to improve the second lining force state has an obvious effect.When the thickness was reduced from the original design of 50 cm to 30 cm,the second lining structural safety coefficient still met the standard requirements,indicating potential for further optimization and reduction.

关 键 词：软弱围岩 隧道衬砌 二衬厚度 数值计算 参数优化 

分 类 号：U455.91[建筑科学—桥梁与隧道工程]