东南大学学报（英文版）2020，Vol.36Issue(4)：425-435,11.DOI:10.3969/j.issn.1003-7985.2020.04.008
跨逆断层乌鲁木齐地铁2号线抗断设计过程研究
Study on anti-faulting design process of Urumqi subway line 2 tunnel crossing reverse fault
摘要
Abstract
For the tunnel crossing active fault,the damage induced by fault movement is always serious.To solve such a problem,a detailed anti-faulting tunnel design process for Urumqi subway line 2 was introduced,and seven three-dimensional elastic-plastic finite element models were established.The anti-faulting design process included three steps.First,the damage of tunnel lining from different locations of fault rupture surfaces was analyzed.Then,the analysis of the effect on tunnel buried depth was given.Finally,the effect of the disaster mitigation method on the flexible joint was verified and the location of the flexible joint was discussed.The results show that when the properties of surrounding rock at the tunnel bottom grows soft,the tunnel deformation curve is smoother and tunnel damage induced by fault movement is less serious.The vertical displacement change ratio of secondary linings along the tunnel axis may be the main factor to cause shear damage to the tunnel.The interface between the hanging wall and fracture zone is defined as the most adverse fault rupture surface.The tunnel damage was reduced with the decrease in the tunnel buried depth as more energy was dissipated by overburden soil and the differential uplift zone of soil became more diffuse.The method of the flexible joint can reduce the tunnel damage significantly and the disaster mitigation effect of different locations on the flexible joint is different.The tunnel damage is reduced by the greatest degree when the flexible joint is located on the fault rupture surface.关键词
地铁隧道/有限元方法/抗断设计流程/错动面/埋深/柔性接头Key words
subway tunnel/finite element method/anti-faulting design process/fault rupture surface/buried depth/flexible joint分类
建筑与水利引用本文复制引用
安韶,陶连金,边金..跨逆断层乌鲁木齐地铁2号线抗断设计过程研究[J].东南大学学报（英文版）,2020,36(4):425-435,11.基金项目
Foundation items:The National Natural Science Foundation of China(No.41572276),the National Key Research and Development Program of China(No.2017YFC0805400). （No.41572276）
