基于长春某工程在基坑降水引发地面沉降方面的影响分析

Analysis of the Impact of a Certain Project in Changchun on Ground Settlement Caused by Foundation Pit Dewatering

本文以长春某基坑实际工程为背景,通过Midas GTS NX软件对基坑内的降水状况进行了模拟,得出施工的降水阶段对周边地表环境及支护结构的变形影响规律。结果表明,降水过程对周边地表造成的沉降作用以降水井为中心,呈降水漏斗状曲线,沉降最大值出现在降水井附近,对支护结构产生变形作用的最大值出现在桩顶,随桩体深度的下降呈下降曲线,分层降水对控制地表沉降可以起到良好的作用。

This article takes an actual foundation pit project in Changchun as the background,and simulates the precipitation situation inside the foundation pit using Midas GTS NX software.The influence of the precipitation stage of construction on the surrounding surface environment and support structure deformation is obtained.The results indicate that the settlement effect caused by the precipitation process on the surrounding surface is centered around the precipitation well,forming a precipitation funnel shaped curve.The maximum settlement value occurs near the precipitation well,and the maximum deformation effect on the support structure occurs at the top of the pile.As the depth of the pile decreases,it shows a downward curve.Layered precipitation can play a good role in controlling surface settlement.