李梅,陆宇嘉,梅万全,韩高升,陈光海,赵明生,柯昌均,任高峰

• 1:武汉理工大学资源与环境工程学院
• 2:武汉理工大学关键非金属矿产资源绿色利用教育部重点实验室
• 3:武汉理工大学矿物资源加工与环境湖北省重点实验室
• 4:中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室

摘要(Abstract)：

爆破开挖产生的扰动P波会影响隧道的稳定性，引水隧洞里充满了水，其隧道围岩动力响应解析解求法与常规无水隧道的求法势必不一样。目前现有解析解研究多集中在稳态解和单衬砌隧道，较少同时考虑存在复合衬砌隧道和有水的情况，因此，开展瞬态P波扰动下深埋圆形复合衬砌引水隧洞稳定性瞬态响应研究，将隧道内流体视作另一种介质，隧道与衬砌之间视为非理想接触面，结合傅里叶合成技术、波函数展开法及梯形求积公式对隧道围岩瞬态响应进行理论求解；通过与既有文献结果对比，验证了方法的有效性；进而分析围岩泊松比、非理想界面模型的弹性系数以及扰动荷载加载时间对动应力集中系数的影响。研究结果表明：动力扰动过程中，顶底板产生显著的压应力集中，两帮出现显著的拉应力集中；随着泊松比增大，两帮由拉应力集中转化为压应力集中，顶底板压应力集中逐渐减弱；围岩衬砌接触较差时，隧道围岩应力时程响应曲线出现显著振荡；随着界面弹性系数增大，非理想界面模型的动力响应收敛于理想界面模型的响应；随着爆破荷载作用时间增加，顶底板处的压应力峰值先增大，两帮处的拉应力峰值先减小，最后均趋向稳定。

关键词(KeyWords)： 扰动P波;复合衬砌引水隧洞;瞬态响应;傅里叶合成技术;波函数展开法

Abstract:

Keywords:

基金项目(Foundation): 湖北省技术创新专项重大项目(2022BEC040)近距离多层磷矿优化开采碳排放核算关键技术研发;; 国家自然科学基金(52064003)~~

作者(Author): 李梅,陆宇嘉,梅万全,韩高升,陈光海,赵明生,柯昌均,任高峰

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