兰州某地铁车站深基坑监测与数值模拟分析

叶帅华; 丁盛环; 龚晓南; 高升; 陈长流

doi:10.11779/CJGE2018S1029

兰州某地铁车站深基坑监测与数值模拟分析 English Version

叶帅华^{1, 2, 3},
丁盛环^{1, 2},
龚晓南³,
高升⁴,
陈长流⁵

1. 兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州 730050;
2. 兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州 730050;
3. 浙江大学滨海和城市岩土工程研究中心,浙江杭州 310058;
4. 中铁第一勘察设计院集团有限公司,陕西西安 710043;
5. 中国移动通信集团甘肃有限公司,甘肃兰州 730030

基金项目: 国家自然科学基金项目（51508256）; 甘肃省建设科技攻关计划项目（JK2015-5）; 兰州市科技发展计划项目（2015-3-131）

详细信息

作者简介:
叶帅华(1983- ),男,河南巩义人,博士后,副教授,主要从事支挡结构、地基处理及岩土工程抗震方面的教学和研究工作。E-mail：yeshuaihua@163.com。

中图分类号: TU473
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出版历程
- 收稿日期: 2017-06-10
- 发布日期: 2018-08-24

Monitoring and numerical simulation of deep foundation pit of a subway station in Lanzhou

1. Key Laboratory of Disaster Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Center of Disaster Mitigation in Civil Engineering, Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China;
3. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
4. China Railway Frist Survey and Design Institute Group Co., Ltd., Xi'an 710043, China;
5. China Mobile Group Gansu Co., Ltd., Lanzhou 730030, China

摘要

摘要: 依托兰州市地铁某车站基坑工程,对基坑施工过程中的桩顶水平和竖向位移、地表沉降、钢支撑轴力及地下水位进行了监测,并对监测数据进行了系统分析。监测结果分析表明,桩顶水平位移随着基坑的开挖由小变大逐渐趋于平稳,桩顶竖向位移随着开挖深度的增加而逐渐增加,在开挖的过程中钢支撑的轴力趋于稳定。最后借助有限元软对基坑开挖进行了数值模拟,并将模拟结果与监测结果进行了对比分析,结果表明,数值模拟和监测结果变化规律基本一致,证明了钻孔灌注桩联合钢管内支撑结构安全可行,保证和维护了基坑的稳定,为类似基坑的施工提供了有效可靠的参考资料。
- 车站 /
- 基坑 /
- 变形 /
- 支撑轴力 /
- 地下水位 /
- 监测分析 /
- 数值模拟
Abstract: Based on the foundation pit of a subway station in Lanzhou, the horizontal and vertical displacements of pile top, surface settlement, axial force of steel supports and groundwater level of foundation pit during construction are monitored, and the monitoring data are analyzed. The monitoring results show that the horizontal displacement of pile top gradually changes from small to large and the vertical one of pile top increases with the increase of excavation depth, and the axial force of steel supports in the excavation process tends to be stable. Finally, the finite element software is used to simulate the excavation of the foundation pit. The simulated and monitoring results are compared. The results show that the numerical simulations and the monitoring results basically have the same variation rules. It is proved that the combined structure of steel tube bored pile and support is safe and feasible, and it ensures and maintains the stability of the foundation pit. This study may provide effective and reliable reference for the construction of similar foundation pits.
- subway station /
- foundation pit /
- deformation /
- axial force of support /
- groundwater level /
- monitoring analysis /
- numericl simulation

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参考文献(12)

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