大断面矩形顶管近距离双线并行施工引发地表沉降分析

发布时间：2018-01-21 05:21

本文关键词： 地下工程隧道大断面矩形顶管沉降施工数值模拟监测　出处：《施工技术》2017年20期 　论文类型：期刊论文

【摘要】：以郑州市纬四路—商务西三街下穿中州大道顶管工程为例,采用理论分析、数值计算和现场监测等手段,初步总结了大断面矩形顶管近距离双线并行施工所引发的地表沉降特征,主要结论如下:地表沉降主要发生在切口到达及顶管通过的过程中,当切口距测点23m时,沉降基本稳定,最大沉降量约为17~27mm;地表横向沉降曲线基本符合Peck公式,沉降槽半宽度约为1.5D。
[Abstract]:Taking the pipe jacking project of Zhonzhou Avenue under the West third Street in Zhengzhou as an example, theoretical analysis, numerical calculation and field monitoring are used. The characteristics of surface subsidence caused by the parallel construction of large section rectangular pipe jacking in short distance are summarized. The main conclusions are as follows: the surface settlement mainly occurs in the process of notch arrival and pipe jacking. When the notch is 23 m from the measuring point, the settlement is basically stable, and the maximum settlement is about 17 ~ 27mm. The surface lateral settlement curve basically accords with the Peck formula, and the half width of the settlement trough is about 1.5 D.
【作者单位】：郑州市工程质量监督站;
【分类号】：P642.26;U456.3
【正文快照】： 0引言近年来,随着城市车辆保有量及人口的进一步增加,诸如居民过街难、道路交叉口车辆交通拥挤、市政管线施工对道路的反复开挖等“城市病”越来越突出,而地下隧道的建设可以有效缓解上述问题。在进行城市地下隧道建设时,相比其他断面形状和施工方法,矩形顶管法隧道因空间利用

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