分离式双隧道围岩支护与沉降规律研究  

作　　者：李朝阳 李鹏 欧阳旺 刘钱丰 刘正兴 杨俭兴 王圣龙 崔梦园 刘涛影[3] 

机构地区：[1]广西六宾高速公路建设发展有限公司,南宁530023 [2]湖南联智科技股份有限公司,长沙410200 [3]中南大学资源与安全工程学院,长沙410083

出　　处：《科技创新与应用》2023年第27期66-69,共4页Technology Innovation and Application

基　　金：国家自然科学基金资助项目(52004327)。

摘　　要：针对分离式双隧道暗挖施工过程存在的问题,依托于广西高良隧道工程对分离式双隧道开挖过程中双隧道拱顶沉降、底部变形、洞周收敛、初支结构应力和二衬结构应力等指标进行分析。总结分离式隧道开挖过程中对隧道支护的影响,得到洞周变形和拱顶沉降等,从而对隧道周围岩石拉压应力分布及二衬结构拉压应力分布进行分析。Aiming at the problems existing in the hidden excavation process of separated double tunnels,based on the Gaoliang tunnel project in Guangxi,this paper analyzes the indexes of double tunnel vault settlement,bottom deformation,tunnel perimeter convergence,first branch structure stress and second lining structure stress in the process of separated double tunnel excavation,and summarizes the influence on tunnel support in the process of separated tunnel excavation.The deformation around the tunnel and the settlement of the vault are obtained,and the tension-compression stress distribution of the rock around the tunnel and the tension-compression stress distribution of the second lining structure are analyzed.

关 键 词：分离式隧道 围岩支护 沉降规律 数值模拟 动态变化 受力影响 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]