浅谈隧道洞口仰坡滑坡成因及综合治理措施  

A Brief Discussion on Causes of the Front Slope Landslide at Tunnel Portal and Its Comprehensive Control Measures

作　　者：李广林 王亮 郭毅 LI Guanglin;WANG Liang;GUO Yi(China Construction Communications Construction Group Co.,Ltd.,Shanxi Branch,Taiyuan 030031)

机构地区：[1]中建交通建设集团有限公司山西分公司,太原030031

出　　处：《现代隧道技术》2020年第S01期1147-1151,共5页Modern Tunnelling Technology

摘　　要：隧道洞口段一般均穿过浅埋山体表层,而山体表层多由风化严重土体组成,稳定性差,且隧道洞口段开挖施工会破坏原山体坡面的平衡状态,极易造成隧道洞口段仰坡失稳,进而导致仰坡发生滑坡事故。在洞口段地质条件较差、仰坡稳定困难时,特别是易导致仰坡滑坡事故时,结合现场实际情况,通过采取卸载和调坡方法进行综合治理,实际施工效果表明,按照该治理方案施工完成后,隧道出口洞口段仰坡未发现新的质量缺陷。研究结果可为类似工程提供一定的参考和借鉴。The tunnel portal section generally passes through the shallow-buried mountain surface,which is mostly composed of severely weathered soil and has poor stability.Moreover,the excavation of the tunnel portal section will destroy the original balance state of the mountain slope,cause instability of front slope at tunnel portal,resulting in landslide at the front slope.In the case of unfavorable geological conditions at the tunnel portal and instability of the front slope,especially when it is prone to causing landslide accident of front slope,based on the actual situation of the site,through the comprehensive treatment of unloading and slope adjustment method,the landslide in slope construction at tunnel portal section is successfully controlled,and the research results can provide reference for similar projects.

关 键 词：隧道洞口 仰坡 滑坡 卸载 方法 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]