施工技术 2014年9月下 78 CONSTRUCTION TECHNOLOGY 第43卷第18期 D0I:10.7672/5js2014180078 浅埋偏压隧道的二衬开裂机理及治理措施研究* 贾东彦，余莉，孙洋 (中国地质大学（武汉）工程学院，湖北武汉430074) [摘要]隧道二衬开裂使隧道的稳定性和安全运营受到威胁，对其力学机理及治理措施的研究具有重要意义.为 此，引入某浅埋偏压隧道为研究对象，首先进行现场调查开裂情况，发现其进口右洞（远离山体侧）左侧拱顶有十几 米的纵向开裂.根据该隧道的真实情况建立离散元模型，进行计算分析，得出以下结果：隧道左、右洞拱顶受到来 自左侧的地形和岩层结构偏压，其右洞的偏压应力超过二衬的承载能力而发生破坏.在此基础上，提出隧道二衬 开裂的处理措施为拱、墙局部裂损部位的治理. [关键词]隧道工程：二衬；裂缝；离散元模拟；处理措施 [中图分类号]U45 [文献标识码]A [文章编号]1002-8498(2014)18-0078-04 Research of the Second Lining Cracking Mechanism and Control Measures for a Shallow Bias Tunnel Jia Dongyan Yu Li Sun Yang Faculty of Engineering China University of Geosciences Wuhan Hubei 430074 China) Abstract:The tunnel second lining cracking threatens the tunnel stability and safety of the operation so the study of its mechanical mechanism and control measures has a great significance.For this purpose taking a shallow bias tunnel as research object all on-site investigation cracking situation is investigated to find dozens of meters of longitudinal crack on the left side of the dome for the import right hole(away from the side of the mountain).Discrete element model is set up according to the real situation of the channel and then the calculation and analysis is done to obtain the following results:bias pression of the tunnel vault around hole es from the left side of the terrain and rock structure the right hole bias stress exceed the bearing capacity of the second lining so the damage has happened.On this basis the measures for th...
浅埋偏压隧道的二衬开裂机理及治理措施研究.pdf
