摘要
研究目的:城市地铁车站施工往往采取明挖法,对环境影响相对较大,因周边环境复杂,重要构造物、建筑物众多。武汉地铁2号线循礼门车站,22 m基坑开挖边界离轻轨桥墩最近仅1.25 m,而轻轨桥作为构筑物,需要满足轻轨运营的要求,对差异沉降极为敏感。因此,需对这一复杂环境下关键区段的施工进行监测与分析,提出解决方案。研究结论:武汉地铁2号线循礼门车站施工过程中,沉降监测数据相对较大,可能干扰紧邻轻轨的运营。本文通过分析基坑与轻轨桥墩的相对位置、土层分布等,调整优化了施工方案,增加了监测点,使相邻基坑的轻轨桥墩在进一步施工过程中,沉降趋于稳定,使轻轨桥墩的绝对沉降与差异沉降得到了控制。
Research purposes： The open-cut method is often used for construction of metro station and with it the metro station construction affects the surrounding environment because the surrounding environment is complex and there are many buildings and structures.For construction of Xunlimen Station of Line 2 of Wuhan metro,the distance between the excavation edge of 22 m deep foundation pit and the bridge pier light railway was only 1.25 m.The bridge piers should meet the operation requirement of light rail traffic,and they were sensitive to the differential settlements,so it was necessary to monitor and analyze the construction in this key and complex section for offering the solution.Research conclusions：During construction of Xunlimen Station,the monitored data on settlement showed the construction of Xunlimen Station may much affect the operation of the light railway.Through analysis of the relative position of the deep foundation pit to the bridge pier of light rail and the distribution of the soil layer,the construction scheme was optimized and the additional monitoring points are added.With these measures,the settlements of the bridge pier trended to stable and the absolute settlement values and the differential settlement values were effectively controlled in the next construction.
出处
《铁道工程学报》
EI
北大核心
2010年第9期74-77,81,共5页
Journal of Railway Engineering Society
基金
国家杰出青年科学基金(50925828)
中国博士后科学基金(20090460953)
关键词
地铁工程
深基坑
复杂环境
监测分析
metro construction
deep foundation pit
complex environment
monitoring and analysis
