深埋直墙拱形隧道稳定性研究  

Analysis of Stability of Arch Tunnel with Deep Buried Straight Wall

作　　者：覃业韬 Tan Yetao(th Engineering Co.,Ltd.Of China Railway 18th Bureau Group Tianjin 300459)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300459

出　　处：《石家庄铁路职业技术学院学报》2021年第1期47-51,共5页Journal of Shijiazhuang Institute of Railway Technology

摘　　要：为了研究深埋直墙拱形隧道围岩稳定性问题,本文采用极限分析有限元方法并结合强度折减理论对深埋直墙拱形隧道围岩的安全系数进行计算并作为判定隧道围岩是否稳定的依据。将计算所得安全系数与已有文献结果进行比较验证,最后采用本文所提出的方法分析新建玉溪至磨憨铁路太达村隧道稳定性,分析结果用来指导隧道施工。研究结果表明:本文所采用方法能够更好地评估隧道围岩稳定性,所选择隧道围岩需要额外支护措施以保证开挖隧道稳定性。In order to investigate the stability of surrounding rock of arch tunnel with deep buried straight wall,the finite element limit analysis method incorporating the strength reduction theory is adopted to calculate the factor of safety(FoS),and it is also employed to estimate the stability of the surrounding rock of arch tunnel with deep buried straight wall.The FoS calculated in this study are validated by the results from exciting research.Finally,the stability of newly constructed Taidacun tunnel of Yuxi-Mohan Railway is analyzed by using the method proposed in this study.And the conclusion obtained in this study is used to guide the tunnel construction.The results show that the method adopted in this study can better estimate the stability of the surrounding rock of arch tunnel with deep buried straight wall,and the surrounding rock of the selected tunnel needs additional supporting measures to ensure the stability of excavation tunnel.

关 键 词：极限分析有限元 强度折减 深埋直墙拱形隧道 安全系数 隧道稳定性 

分 类 号：U455[建筑科学—桥梁与隧道工程]