某地铁站基坑开挖支护桩水平位移分析

本文以合肥地铁一号线青阳路站基坑工程为背景,利用MIDAS GTS NX有限元软件选取基坑典型控制截面进行二维建模,分析了对称与非对称两种堆载下支护桩水平位移随开挖深度的变化规律,对比了不同挖深下两种荷载情况围护桩最大水平位移值及其发生位置。结果表明,基坑两侧堆载的形式对支护桩的水平位移有明显影响;非对称堆载作用下支护桩水平位移呈明显不对称性,堆载大的一侧水平位移值较大且发生位置较浅。本文可为相关基坑工程的设计开挖提供参考借鉴。具有一定的科技应用价值。

Analysis of Foundation Pit Retaining Pile Horizontal Displacement of Subway Station

In this paper, based on the foundation pit engineering of Qingyang Road Station of Hefei Metro Line 1, using MIDAS GTS NX modeling two-dimensional, and analyzed the retaining piles under sym-metric and asymmetric horizontal displacement along with the change of the excavation depth, compared to two kinds of load maximum horizontal displacement of supporting pile and its position. The result show that on each side of the pit heap load forms have obvious influence on the horizontal displacement of retaining pile; asymmetric pile retaining piles under the action of horizontal displacement is obvious asymmetry, the displacement of pile side horizontal load value is large and shallow. It can provide a reference for the design of foundation pit engineering excavation. The result has a certain value of application of engineering.and technology.