木林溪隧道洞口高边坡稳定性监测分析  

Monitoring and Analysis of High Slope Stability at the Entrance of Mulinxi Tunnel

作　　者：覃琴 麻海法 张蓓 陈晓艳 QIN Qin;MA Haifa;ZHANG Bei;CHEN Xiaoyan(Shaanxi Branch of Jiangxi Dongtong Traffic Technology Co.,Ltd.,Xianyang Shaanxi 712000,China)

机构地区：[1]江西东通交通科技股份有限公司陕西分公司,陕西咸阳712000

出　　处：《工程质量》2025年第3期17-21,共5页Construction Quality

摘　　要：以湖北省宣恩县长潭河侗族乡猫子庄木林溪境内木林溪隧道工程为依托,进行了从隧道洞口开挖过程中形成的高边坡安全稳定性的分析。研究从边坡变形曲线发展规律的角度出发,提出了阶段划分及其特征。根据现场监测数据分析,确定了洞口开挖对高边坡稳定性的影响。结果表明,边坡测点变形沉降曲线的发展规律主要可划分为初期变形、中期平稳、后期过渡、末期加速和破坏五个阶段,其中大部分变形和沉降发生在初期和中期变形发展阶段。研究发现,随着掌子面掘进,洞口高边坡出现变形沉降,变形速率逐渐减小并在零值附近波动,边坡基本达到稳定状态,验证了锚喷支护措施的可靠性,解决了高边坡变形问题。该研究结果为木林溪隧道洞口高边坡施工提供了指导。Based on the construction of the Mulinxi Tunnel in Maozizhuang,Dongzu Township,Changtanhe,Xuan'en County,Hubei Province,an analysis of the safety and stability of the high slope formed during tunnel excavation at the tunnel portal was conducted.The study proposed a division of stages and their characteristics based on the development pattern of slope deformation curves.By analyzing on-site monitoring data,the impact of portal excavation on the stability of the high slope was determined.The results indicated that the development of slope deformation and settlement curves could be divided into five stages:initial deformation,intermediate stability,later transition,accelerated final stage,and failure.The majority of deformation and settlement occurred during the initial and intermediate stages.The study revealed that as the face advanced,the high slope at the tunnel portal experienced deformation and settlement,with the deformation rate gradually decreasing and fluctuating around zero.The slope ultimately reached a stable state,thus verifying the reliability of the anchor spray support measures and resolving the issue of high slope deformation.These research findings provide guidance for the construction of the high slope at the Mulinxi Tunnel portal.

关 键 词：隧道工程 高边坡 监测分析 稳定性 

分 类 号：U416.14[交通运输工程—道路与铁道工程]