兰州市湿陷性黄土地区地铁车站深基坑变形规律监测与数值模拟研究

吴意谦; 朱彦鹏

doi:10.11779/CJGE2014S2071

兰州市湿陷性黄土地区地铁车站深基坑变形规律监测与数值模拟研究 English Version

吴意谦^{1, 2},
朱彦鹏^{1, 2, 3}

1. 兰州理工大学土木工程学院,甘肃兰州 730050;
2. 甘肃省土木工程防灾减灾重点实验室,甘肃兰州 730050;
3. 西部土木工程防灾减灾教育部工程研究中心,甘肃兰州 730050

基金项目: 国家科技支撑计划项目（2011BAK12B07）; 国家自然科学基金项目（50978129）

详细信息

作者简介:
吴意谦(1986- ),男,博士研究生,主要从事岩土工程支挡结构方面的研究工作。E-mail: 371901233@qq.com。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Monitoring and numerical simulation of deformation law of deep foundation pit of subway station in Lanzhou collapsible loess

WU Yi-qian^{1, 2},
ZHU Yan-peng^{1, 2, 3}

1. School of Civil Engineering,Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou 730050, China;
3. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou 730050, China.

摘要

摘要: 以兰州市地铁1号线一期工程世纪大道车站深基坑工程为依托,给出了该车站深基坑支护结构的变形监测方案,制定了监测项目、监测仪器和监测频率,完成了现场的监测工作,根据监测结果分析了围护结构及周围土体随着基坑开挖深度和时间变化的位移规律。结果表明,围护结构设计及监测方案是合理可行的,钻孔灌注桩+钢管内支撑的支护形式能够有效地控制基坑变形,保证地铁车站的安全施工。同时也对地铁车站深基坑开挖进行全过程数值模拟计算,将获得的结果与监测数据进行了对比分析。分析表明数值计算结果与现场监测结果较为一致,研究为兰州地区地铁车站深基坑工程的合理设计与安全施工提供了科学依据。
- 地铁车站 /
- 深基坑 /
- 变形 /
- 监测 /
- 数值模拟
Abstract: Taking the deep foundation pit of Shijidadao Station of the first-stage project of Lanzhou subway line No. 1 as background, the deformation monitoring plan of its supporting structures is introduced. The monitoring items, instruments and frequencies are formulated. The in-situ monitoring is completed. According to the monitoring results, the characteristics of deformation of piles and the surrounding soils of supporting structures with time are analyzed. The results show that the design of supporting structures and the monitoring plan are reasonable. The supporting structures of bored piles and interior support can control the deformation efficiently and ensure a safe construction of the subway station. At the same time, the method of FLAC^3D is used to study the whole excavation process of the foundation pit. The calculated results are consistent with the monitoring data. This study may provide reference for the reasonable design and safety construction of deep foundation pits of subway in Lanzhou.
- subway station /
- deep foundation pit /
- deformation /
- monitoring /
- numerical simulation

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参考文献(16)

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