基于弹性地基梁理论的跨活断裂隧洞纵向变形及内力响应特性研究  

Study on the Longitudinal Deformation and Mechanical Response Characteristics of a Tunnel Crossing Active Fault Based on Elastic Foundation Theory

作　　者：马亚丽娜 盛谦[1,2] 崔臻 程昊民[1,2] MA Yalina;SHENG Qian;CUI Zhen;CHENG Haomin(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]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,湖北武汉430071 [2]中国科学院大学,北京100049

出　　处：《防灾减灾工程学报》2018年第4期715-722,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家重点基础研究发展计划(973)项目(2015CB057905);国家重点研发计划(2016YFC0401803);国家自然科学基金项目(51409263,51779253,41672319)资助

摘　　要：基于温克尔地基梁理论，建立穿越活动断裂带的隧洞纵向二维数值模型，研究穿越活动断裂带隧洞在断裂带错动作用下的衬砌纵向变形及内力响应特征。结果表明：在错断作用下，较弱的断层带岩体质量、较大的断层与隧洞交角、较宽的活断层宽度、较大的隧洞衬砌厚度等条件有利于保证隧洞的抗错断性能；当在隧洞衬砌节段之间采用较弱的铰接段来改善隧洞抗错断性能时，较小的铰接段的长度与材料强度均有利于隧洞抗错断性能。该结论可以为穿越活断层隧洞的抗错断设计提供一定参考。The aim of this paper is to study the characteristics of longitudinal deformation and mechanical response of a tunnel under active fault dislocation. A 2-D longitudinal numerical model of the tunnel is established based on the Winklers elastic foundation theory. Using this model, the mechanical response of the tunnel liner under various fault conditions is investigated. The results show that the tunnel would have better anti-dislocation performance with weaker rock mass of fault, larger angle between fault and tunnel axes, wider fault width, and thicker tunnel lining. Under the condition that flexible hinge joints on the tunnel lining were applied to improve the an- ti-dislocation performance of the tunnel, the anti-dislocation performance would be enhanced with a smaller length and a lower material strength of the hinge joint. The conclusions may provide some reference for the anti-dislocation design of tunnels crossing active faults.

关 键 词：隧洞工程 活动断裂带 铰接段 地基弹簧 内力响应 

分 类 号：TV554[水利工程—水利水电工程]