地震荷载下断层隧道衬砌的动力响应特性研究
Dynamic behavior of fault tunnel lining under seismic loading conditions
王迎超 1郭崟 2邱雨 3姜雯 3李元海 2程诚3
作者信息
- 1. State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock andSoil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China
- 2. State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China
- 3. School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China
- 折叠
摘要
隧道衬砌结构在地震作用下会产生开裂、垮塌、错台等灾害,尤其是当隧道穿越断层时,以上震害将带来更重大的损失.本文使用FLAC3D软件,以四川某隧道为工程背景构建断层隧道围岩-衬砌结构模型,研究断层宽度和倾角对隧道衬砌结构动力响应的影响规律,分析位移、内力以及隧道塑性区的变化规律.结果表明断层破碎带对隧道的影响主要是以剪切作用为主,断层倾角越大,对隧道结构越有利;断层宽度越大,断层影响带范围越大,对隧道结构越不利.研究结果可为隧道穿越断层时抗震措施的完善提供理论依据.
Abstract
The tunnel lining structure will withstand diseases such as cracking, collapse and dislocation in earthquake action, and heavy losses will be brought, especially when the tunnel passes through the fault. In this study, FLAC3D software was used to construct the surrounding rock-lining structure model of the across-fault tunnel based on a tunnel in Sichuan, China. The influence of fault width and dip angle on the dynamic response of tunnel lining structure was studied, and the variation of displacement, internal force and tunnel plastic zone were analyzed. The results showed that the shear effect is the clearest influence of fault fracture zone on the tunnel. The larger the fault dip angle, the more favorable it is to the tunnel lining structure. The larger the fault width, the larger the fault influence zone, and the more unfavorable it to the tunnel lining structure. The results can provide a theoretical basis for the improvement of seismic measures when tunneling through faults.
关键词
地震加速度/隧道衬砌结构/断层参数/动力响应Key words
seismic acceleration/tunnel lining structure/fault parameters/dynamic response引用本文复制引用
基金项目
National Natural Science Foundation of China(42272313)
Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chi(Z020014)
Key Research and Development Program(Social Development)of Xuzhou City,China(KC21298)
Key Research and Development Program(Social Development)of Xuzhou City,China(KC21310)
Scientific Research Project of China Railway Shanghai Group Co.,Ltd(2022178)
出版年
2023
NETL
NSTL
维普
万方数据