舒中文,滕汉卿,李星,康健,吴坤,陈怀林

• 1:中铁科学研究院有限公司
• 2:西南交通大学土木工程学院
• 3:极端环境岩土和隧道工程智能建养全国重点实验室
• 4:中国建筑一局有限公司投资运营公司

摘要(Abstract)：

【目的】对于滑坡-隧道正交体系，滑坡的变形失稳是引发隧道病害的重要原因。为了研究滑坡-隧道正交体系在滑坡失稳过程中的宏观变形特性，【方法】以阳坡里隧道为研究对象，使用自主研发的牵引式滑坡分级滑动模拟试验装置设计开展了12组室内模型试验，研究了在滑坡-隧道正交体系中滑坡失稳情况下隧道埋深、隧道在滑体内的布置位置以及滑动段位置对“洞周位移指数”的影响。【结果】结果显示：滑坡发生失稳时的坡面宏观变形存在一定规律，通常表现为坡面的后缘裂缝以及次级裂缝，且坡面位移沿次级裂缝存在明显分级情况；在其他变量相同的情况下，隧道在滑坡体内部埋深越大、隧道布置位置越靠近滑坡体前缘、滑动段越靠近滑坡中段时，滑坡滑动对隧道周围0.5～1.0倍隧道直径范围内土体的位移影响越大；滑动段位置对洞周位移指数影响最大，当滑动段分别位于滑坡前段、中段和后段时，洞周位移指数分别为小于0.8、大于1.8和介于1.0～1.5之间。【结论】研究成果可为滑坡隧道的变形演化机理、滑坡诱发隧道病害的预测预报以及防治技术等研究提供参考。

关键词(KeyWords)： 滑坡-隧道正交体系;变形特性;模型试验;洞周位移指数;滑坡;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51178402);; 中国中铁股份有限公司重点科研项目(2022-重点-38)

作者(Author): 舒中文,滕汉卿,李星,康健,吴坤,陈怀林

DOI: 10.13928/j.cnki.wrahe.2024.09.013

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