盾构施工对地表建筑物位移的影响分析

摘要

为研究地铁盾构施工对地表建筑物位移的影响,基于实际工程资料,采用ANSYS三维建模来进行模拟计算,以期对不同施工步下地表的建筑物特征点、横向以及纵向考察带位移曲线进行分析.分析结果表明,盾构施工对隧道前方15 m以及左右20 m均有影响,对地表建筑物的影响与施工中产生的地表位移曲线的位置相关,后期隧道的修建并未引起前期隧道的最大沉降位置发生较大移动.%In order to study the influence of metro shield construction on the displacement of surface structures,this paper conducts ANSYS three-dimensional modeling for simulated calculation based on actual engineering data to analyze the displacement curves of building feature point,transverse and longitudinal zones under different construction steps.The analysis results show that the shield tunneling affects the front of the tunnel by 15 m and the left and right by 20 m,and the impact on the surface structure is related to the location of the surface displacement curve;the later tunneling doesn't lead to larger displacement where the maximum settlement occurs due to tunneling in the early stage.