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西安地铁2号线是西安的第一条地铁线路,它穿过了13条地裂缝中的10条,西安地裂缝是在西安正断层组的基础上发育起来的,地裂缝的变形具有不可抗拒性和巨大的破坏性,会给隧道结构带来致命的危害,地裂缝引起的隧道结构破坏模式有两种:拉张-挤压破坏型和直接剪断破坏型。通过分析地裂缝的活动特征,估算出2号线沿线地裂缝的最大垂直位移量及百年变形量,分别阐述明挖法、浅埋暗挖法的结构处理方案,地裂缝处理的接头方案,地裂缝处的结构防水等技术措施。
Xi’an Metro Line 2 is the first subway line in Xi’an. It passes through 10 of the 13 ground fissures that developed on the basis of the Xi’an Normal Fault Group. The deformation of the ground fissures is irresistible Sexual and huge destructive, will cause the fatal hazard to the tunnel structure, there are two kinds of damage modes of the tunnel structure caused by the ground fissure: stretching-crushing destruction and direct shear failure. By analyzing the characteristics of ground fissures, the maximum vertical displacement and centennial deformation of ground fissures along Line 2 are estimated. The structures of the open excavation method, the shallow buried tunneling method and the joints treatment of ground fissures are described respectively. Cracks at the structure of waterproof and other technical measures.