特殊工况下地铁基坑多支撑负载响应研究

崔维久; 刘俊岩; 刘燕

特殊工况下地铁基坑多支撑负载响应研究 English Version

(济南大学土木建筑学院，山东济南 250022)

详细信息

作者简介:
崔维久(1989– )，男，山东日照人，济南大学硕士研究生，从事基坑工程研究。

中图分类号: TU473.2
计量
- 文章访问数: 1042
- HTML全文浏览量: 0
- PDF下载量: 411
出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Response of multi-steel shotcrete under load in subway excavations

(School of Civil Engineering and Architecture of University of Jinan, Jinan 250022, China)

摘要

摘要: 对济南省会文化艺术中心地铁车站基坑进行现场施工监测，及时掌握支承轴力、基坑变形的变化动态。结合设计方案，对比分析影响实际轴力变化的因素：①特殊工况条件下，导致多道支撑体系中第一道支撑轴力偏大，且大于第二道、第三道支撑轴力；②通过测温与测力，反算出支撑轴力的温度修正系数；③合理确定预加力大小，减小应力损失，保障钢支撑更好的发挥作用。该研究结果提高了现场基坑监测的准确性，也完善了基坑支护的设计理论。
- 地铁基坑 /
- 多支撑 /
- 监测 /
- 施工 /
- 温度 /
- 应力损失
Abstract: Through the construction monitoring of subway station excavation in Cultural and Artistic Center of Jinan, change of axial force and deformation of steel shotcrete is gained in time. Combined with the design plan, the influencing factors for the axial force are analyzed: (1) the axial force of the first steel shotcrete is larger than the design value under certain construction conditions, and it is larger than that of the second and the third ones; (2) the temperature and axial force are gained to determine the temperature correction factor by inverse computation; (3) to rationally determine the pre-tension to reduce stress loss so as to make full play of multi-steel shotcrete. The results may make the monitoring works more exact and the design theory more perfect.
- subway excavation /
- multi-steel shotcrete /
- monitoring /
- construction /
- temperature /
- stress loss

HTML全文

参考文献(10)

[1]	胡蒙达. 地下围护结构中Ф609钢支撑受变温Tr作用下的热应力计算[J]. 地下工程与隧道, 1998(1): 13–15. (HU Meng-da. Thermodynamic calculation ofФ609 steel brace under temperature change in underground bracing structure[J]. Underground Engineering and Tunnels, 1998(1): 13–15. (in Chinese))
[2]	陈成. 地铁车站基坑钢管内支撑工作性能研究[D]. 郑州:郑州大学. (CHEN Cheng. The working behavior research of steel shotcrete of subway station foundation pit[D]. Zhengzhou: Zhengzhou University. (in Chinese))
[3]	GB50497—2009建筑基坑工程检测技术规范[S]. 北京: 中国计划出版社, 2009. (GB50497—2009 Technical code for monitoring of building excavation engineering[S]. Beijing; China Planning Press. (in Chinese))
[4]	李运涛, 前进. 地铁深基坑开挖与支承轴力、围护结构变形监测分析[J]. 隧道/地下工程, 2004, 4(6): 54–57. (LI Yun-tao, QIAN Jin, et al. The analysis of deformation of retaining structure and axial force of bracing during excavation[J]. Underground Engineering and Tunnels, 2005, 33(5): 547–550. (in Chinese))
[5]	刘建航, 侯学渊, 等. 基坑施工时空效应理论与实践[R]. 上海: 地铁总公司,同济大学, 1997. (LIU Jian-hang, HOU Xue-yuan, et al. The time-space theory and practice in excavation engineering[R]. Shanghai: Shanghai Metro Company and Tongji University, 1997. (in Chinese))
[6]	刘燕, 刘涛, 胡承军, 等. 上海地铁 M8 线某车站基坑开挖变形特征分析[J]. 浙江工业大学学报, 2005, 33(5): 547–550. (LIU Yan, LIU Tao, HU Cheng-jun, et al. The research of deformation laws of shanghai metro line 8 station pit[J]. Zhejiang Industrial University Journal, 2005, 33(5): 547–550. (in Chinese))
[7]	蒋洪胜, 刘国彬. 软土深基坑支撑轴力的时空效应变化规律研究[J]. 岩土工程学报, 1998, 20(6): 105–107. (JIANG Hong-sheng, LIU Guo-bin. Time-space effect on strut-force in deep excavation of soft soil[J]. Chinese Journal of Geotechnical Enginering, 1998, 20(6): 105–107. (in Chinese))
[8]	黄文熙. 土的工程性质[M]. 北京: 水利电力出版社, 1983. (HUANG Wen-xi. Engineering behaviors of soil[M]. Beijing: China Water Power Press, 1983. (in Chinese))
[9]	王坤. 深圳土体蠕变在深基坑工程中的应用[J]. 铁道工程学报, 2011, 155(8): 1006–2106. (WANG Kun. The soil creep application in foundation pits[J]. Chinese Journal of Railway Enginering, 2011, 155(8): 1006–2106. (in Chinese))
[10]	陈绍蕃. 钢结构[M]. 北京: 中国建筑工业出版社, 2007. (CHEN Shao-fan. Steel structure[M]. Beijing: China Architecture & Building Press, 2007. (in Chinese))