双线盾构隧道施工对近接桩基和地表沉隆的影响分析

Analysis on Influence of Doublet-line Shield Tunnel Construction on Adjacent Pile Foundation and Earth Surface Settlement

城市地铁区间修建过程中,盾构隧道开挖对邻近既有构(建)筑物扰动的影响是一个热点、难点问题。针对某城市双线盾构隧道侧穿铁路桥梁桩基且下穿城市道路U型槽工程,采用三维数值仿真模拟技术,研究了盾构隧道施工对邻近桩基的影响。研究结果可为城市轨道交通盾构隧道的安全穿越以及下穿段既有构(建)筑物的监控量测提供了依据。

During the construction period of urban subway sections, the influence of shield tunnel excavation on the disturbance of adjacent existing structures （buildings） is a hot and difficult issue. Aiming at the double - line shield tunnel in a city that passes alongside the railway bridge pile foundation and underneath passes U - shape groove engineering of urban road, the research on the influence of shield tunnel construction on adjacent pile foundation is made by adopting three - dimensional numerical simulation technique. The research result can provide basis for monitoring measurement on the urban rail transit shield tunnel that safely passes and underneath passes existing structures （buildings ）.