罗尧晟,巨能攀,张成强,解明礼,何朝阳,陆渊

• 1:成都理工大学地质灾害防治与地质环境保护国家重点实验室
• 2:四川公路桥梁建设集团有限公司勘察设计分公司

摘要(Abstract)：

反倾层状岩质边坡通常较为稳定，但在开挖扰动等作用影响下容易产生较大的倾倒变形，影响工程施工与建设安全。在西南地区复杂地质条件下对此类边坡进行隧道开挖作业，易发生边坡失稳问题。为此，选取四川汶马高速某隧道进口边坡为研究对象，结合现场勘察、监测数据及数值模拟等手段对反倾层状岩质边坡在隧道开挖影响下的变形特征进行综合分析。结果表明：边坡受内部结构特征控制，隧道开挖后坡底失去支撑，各部位由下而上向临空面倾倒；倾倒体以水平位移为主，位移量值呈现中部大、四周小的态势，且受降雨量影响较大；数值模拟显示边坡在天然状态下为极限平衡状态，隧道开挖后位移由隧道洞口处向上扩展至坡顶，坡内岩体剪切破坏，在类似边坡进行隧道施工时需加强支护。

关键词(KeyWords)： 隧道开挖;反倾层状岩质边坡;边坡变形;边坡稳定;数值计算

Abstract:

Keywords:

基金项目(Foundation): 国家创新研究群体科学基金(41521002);; 地质灾害防治与地质环境保护国家重点实验室自主课题(SKLGP2020Z006)

作者(Author): 罗尧晟,巨能攀,张成强,解明礼,何朝阳,陆渊

DOI: 10.13928/j.cnki.wrahe.2022.07.011

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