重庆科技大学学报（自然科学版）2024，Vol.26Issue(4)：53-60,8.DOI:10.19406/j.issn.2097-4531.2024.04.007
拱腰溶洞大小对隧道围岩和初期支护的影响研究
Study on the Influence of the Size of the Karst Caves at the Arch Waist on the Tunnel Surrounding Rock and Initial Support
摘要
Abstract
During tunnel construction,geological environments such as karst and groundwater are often encoun-tered,which pose a serious threat to the construction and operation safety of tunnels.Inappropriate tunnel excava-tion methods,as well as karst disposal methods,and substandard construction quality will lead to safety accidents such as local partially pressure and collapse in the tunnel.Taking the Xiaba Tunnel in Weixin County,Yunnan Province as the research background,the finite element analysis software Midas GTS NX was used to numerically simulate the existence of karst caves with different diameters at the right arch waist of the tunnel,exploring the in-teraction and influence of seepage field,stress field,and displacement field in the surrounding rock of the tunnel.Based on the analysis of surrounding rock stress,displacement,and internal forces of the support structure,it is found that excavation at the foot of the tunnel wall and arch waist should be controlled to improve the safety of unfa-vorable sections in the initial support of the tunnel and ensure the safety of the tunnel lining structure.关键词
拱腰溶洞/岩溶/隧道/围岩/初期支护/结构应力Key words
arched waist karst cave/karst/tunnel/surrounding rock/initial support/structural stress分类
交通工程引用本文复制引用
余洁,彭杰,郑勇..拱腰溶洞大小对隧道围岩和初期支护的影响研究[J].重庆科技大学学报（自然科学版）,2024,26(4):53-60,8.基金项目
中国博士后科学基金面上资助项目"复杂地质滑坡三维变形光纤监测机理与关键技术研究"(2022M710540) （2022M710540）
重庆市博士后研究项目"基于POF-OTDR的滑坡深部位移监测方法与关键技术研究"(2022CQBSHTB2049) （2022CQBSHTB2049）
