地铁隧道对邻近既有桥桩影响及施工方法优化  

Influences of Subway Tunnel on the Adjacent Existing Bridge Piles and Optimization of Construction Methods

作　　者：田晓艳[1,2] 谷拴成[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安710054 [2]西安石油大学机械工程学院,西安710065

出　　处：《城市轨道交通研究》2017年第3期127-131,135,共6页Urban Mass Transit

基　　金：陕西省教育厅科学研究项目(2013JK0961)

摘　　要：隧道开挖会对周边土层造成扰动,导致既有桥桩发生变形,从而影响桥梁的运营安全。以西安地铁3号线区间隧道为工程背景,采用FLAC3D数值模拟软件对比分析隧道不同施工方法对既有桥梁桩基的影响,并综合考虑各种因素,提出环形开挖预留核心土法作为该区间隧道的施工方法。通过现场监测分析表明,该施工方法能够有效降低地表沉降及对既有临近桥梁桩基的影响,对黄土地区该类隧道工程具有一定的借鉴价值。Tunnel excavation will cause disturbance to the surrounding soil, cause a deformation of the existing bridge pier, thus affect the operation of the bridge is safe. Based on xi＇an metro line 3 tunnel as the engineering background, using numerical simulation software FLAC3D analysis of tunnel in different construction methods for the influence of both the bridge pile foundation, considering various factors, that the area between the tunnel circular excavation reserved core method should be adopted in construction. Through the field monitoring analysis shows that the construction method can effectively reduce the surface subsidence and the influence on both the adjacent bridge pile foundation, the tunnel in the loess area project has a certain guiding significance and reference value.

关 键 词：地铁隧道开挖 施工方法 既有桥梁桩基 施工影响 模拟分析 

分 类 号：U231.3[交通运输工程—道路与铁道工程] U455.4[建筑科学—桥梁与隧道工程]