摘要
山区滑坡对既有隧道结构的受力变形有着重要影响。既有成果一般将滑坡体和隧道结构分开单独研究,而将两者结合起来进行研究还不多见,且多数停留在实际工程监测分析上,利用理论解析法对隧道-滑坡体相互作用的分析更是少见。首先,基于传递系数法和极限平衡法对滑坡下滑推力进行了计算;其次,将滑坡推力施加在既有隧道结构上,建立隧道-滑坡相互作用的弹性地基梁模型,采用传递矩阵法求解出隧道结构任意截面的内力和位移。在此基础上,建立三维数值模型对滑坡诱发隧道变形进行模拟,将数值分析结果与理论计算值进行对比验证,获得了较好的一致性。最后,针对滑坡推力大小、滑体内地基系数、滑床内地基系数、隧道衬砌刚度以及隧道长度等参数进行了影响分析。该研究成果可为滑坡区域既有隧道的维修加固提供一定的理论依据。
In mountain region, landslide has a significant influence on the force and deformation of existing tunnels. The existing researches generally separate the landslide and the tunnel to investigate. However, very little attention is paid to the combination of the two kinds of engineering problems. Moreover, most studies remain on the monitoring analysis of practical engineering. It is rare to analyze the landslide-tunnel interaction by theoretical analysis. In this study, firstly, the landslide thrust is deduced based on the transferring coefficient method and the limit equilibrium method. Secondly, imposing the landslide thrust on the existing tunnel, and establishing elastic foundation beam model for the landslide-tunnel interaction, the internal force and displacement of arbitrary tunnel section are solved by the transfer matrix method. In addition, three-dimensional numerical model is established to simulate the landslide-induced tunnel deformation. The numerical results are compared with the theoretical method, and good consistency is obtained. Finally, the influences of the landslide thrust, the foundation coefficients in the sliding and the sliding bed, tunnel lining stiffness and tunnel length are analyzed. The results can provide certain theoretical support for reinforcement and maintenance of existing tunnels in landslide area.
作者
张治国
马兵兵
黄茂松
徐晓洋
ZHANG Zhi-guo;MA Bing-bing;HUANG Mao-song;XU Xiao-yang(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第10期3555-3564,3572,共11页
Rock and Soil Mechanics
基金
国家自然基金重点项目(No.51738010)
国家自然基金面上项目(No.41772331)
中国矿业大学深部岩土力学与地下工程国家重点实验室基金项目(No.SKLGDUEK1707)~~
关键词
隧道-滑坡相互作用
弹性地基梁
传递矩阵法
理论解析
数值模拟
tunnel-landslide interaction
elastic foundation beam
transfer matrix method
theoretical analysis
numerical simulation
作者简介
张治国，男，1978年生，博士（后），副教授，硕士生导师，主要从事地下工程施工对周边环境影响控制方面的研究工作。E-mail：zgzhang@usst．edu.cn
