软弱隧道围岩压力拱结构特征及影响因素  

The Characteristics and Influencing Factors of Pressure Arch Structure in Soft Tunnel Surrounding Rock

作　　者：许建述 XU Jianshu(Xinjiang Water Development Construction Group CO.LTD.,Urumqi 835000,China)

机构地区：[1]新疆水发建设集团有限公司,新疆乌鲁木齐835000

出　　处：《河南水利与南水北调》2024年第5期46-47,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：隧道开挖施工导致围岩应力场扰动平衡,在地层中形成近似拱形结构的压力拱,研究软弱隧道围岩压力拱特征能够更好地为隧道支护设计提供基础依据。基于隧道压力拱概念通过建立圆形隧道数值分析模型,分析软弱隧道围岩压力拱变化特征,并考虑围岩质量、隧道埋深和隧道跨度的影响,并由此建立了软弱隧道围岩压力拱演化模型。The excavation of a tunnel disturbs and balances the stress field of surrounding rock,resulting in the formation of a pressure arch with similar structural characteristics within the stratum.The study of the characteristics of pressure arch in weak tunnel surrounding rock can offer a more solid foundation for tunnel support design.The numerical analysis model of a circular tunnel was established based on the concept of tunnel pressure arch in weak tunnels,taking into account the influence of surrounding rock quality,tunnel depth and tunnel span.

关 键 词：软弱围岩 隧道工程 压力拱 数值模型 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]