上下重叠地铁盾构隧道施工对邻近建筑物影响及控制措施研究

摘要

During the construction of the urban subway,it is often the case that the subway tunnel passes under buildings.To study the impact of such subway tunnel on buildings,this article,based on a subway tunnel project,uses the method of numerical simulation to analyze the settlement of basement floor and pile caps and pile foundation deformation on account of the shielding tunneling before and after the grouting reinforcement.According to the analysis,grouting reinforcement and other measures should be taken during excavation to control the deformation indexes and reduce the impact of shield excavation on the buildings.%在城市地铁施工建设过程中,经常会出现地铁隧道下穿建筑物的现象.为研究地铁隧道下穿建筑物对建筑物的影响,依托某地铁区间隧道工程,采用数值模拟的方法,对注浆加固前和注浆加固后盾构掘进(先下洞后上洞)地下室底板沉降和承台沉降及桩基变形进行分析.通过分析得知,重叠隧道在隧道开挖过程中,应采取注浆加固等手段,来控制各项变形指标,减小盾构开挖对建筑物的影响.