【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。更多还原

【Abstract】 Tunnel excavation w ill 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 softw are FLAC3 D analysis of tunnel in different construction methods for the influence of both the bridge pile foundation,considering various factors,that the area betw een the tunnel circular excavation reserved core method should be adopted in construction. Through the field monitoring analysis show s 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.更多还原