浅埋偏压隧道施工过程中围岩扰动特征研究  

Disturbance Characteristics of Surrounding Rock During Construction of Shallow and Biased Tunnel

作　　者：赵海涛 胡宇[2] 刘丙宇 张彦龙 张小军[2] 高文学[2] ZHAO Haitao;HU Yu;LIU Bingyu;ZHANG Yanlong;ZHANG Xiaojun;GAO Wenxue(BCEG Road and Bridge Construction Group Co.,Ltd.,Beijing 100123,China;Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京建工路桥集团有限公司,北京100123 [2]北京工业大学城市建设学部,北京100124

出　　处：《施工技术（中英文）》2023年第12期27-31,共5页Construction Technology

基　　金：爆破工程湖北省重点实验室开放基金(BL2021-23)。

摘　　要：为探究浅埋偏压隧道施工过程中围岩应力的变化规律,基于国道109新线高速公路齐家庄隧道工程,采用监控量测与数值模拟方法,对隧道不同位置处的围岩扰动特征进行研究。结果表明:隧道施工过程中,围岩应力产生重分布,其变化规律与围岩赋存状态有关,拱顶应力持续增大,“临时拱脚”处应力先增大后减小,且应力集中显著;偏压作用下,深埋侧围岩应力及增长速率均大于浅埋侧。对不同埋深下齐家庄隧道施工过程围岩扰动进行数值分析,模拟结果表明,埋深在5~25m范围,“临时拱脚”与拱顶应力变化比值随隧道埋深的增加而趋于稳定;距离掌子面0~11m时,“临时拱脚”应力变化幅度大于拱顶。In order to explore the variation law of surrounding rock stress during the construction of shallow and biased tunnel,based on Qijiazhuang Tunnel project of national highway 109,the disturbance characteristics of surrounding rock at different locations of tunnel were studied by using monitoring measurement and numerical simulation methods.The results show that the stress of surrounding rock is redistributed during tunnel construction,and its change law is related to the occurrence state of surrounding rock.The stress of the arch roof continues to increase,and the stress at the“temporary arch foot”increases first and then decreases,and the stress concentration is significant.Under the action of bias,the stress and growth rate of deep buried rock are greater than that of shallow buried rock.The surrounding rock disturbance during construction of Qijiazhuang Tunnel under different burial depths is analyzed numerically.The simulation results show that the ratio of stress variation between temporary arch foot and vault tends to be stable with the increase of tunnel burial depth in the range of 5~25m.When the distance from the face of the palm is 0~11m,the stress variation range of“temporary arch foot”is greater than that of the arch top.

关 键 词：隧道工程 浅埋偏压 围岩 应力 监测 数值模拟 

分 类 号：U455.4[建筑科学—桥梁与隧道工程] U451.2[交通运输工程—道路与铁道工程]