逆作土方运输效率对运营高铁和基坑变形的影响

李明广; 徐安军; 董锋; 陈锦剑; 王建华

逆作土方运输效率对运营高铁和基坑变形的影响 English Version

(1. 上海交通大学土木工程系，上海 200240；2. 上海市基础工程有限公司，上海 200002)

详细信息

作者简介:
李明广(1987– )，男，重庆人，博士生，主要从事岩土工程、地下工程等领域数值试验工作。

中图分类号: TU473
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出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Influences of efficient transport technology of earthwork on operating railways and deformation of excavations using top-down method

(1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Shanghai Foundation Engineering Co., Ltd., Shanghai 200002, China)

摘要

摘要: 上海西站15号线地铁车站基坑下穿沪宁城际铁路，采用全覆盖的逆作法施工，铁路路基和基坑围护结构的变形控制要求高。该工程施工作业环境复杂，逆作条件下的土方运输距离长、出土困难，施工效率较低。软土地区基坑施工的环境变形具有显著的时间效应，提高开挖施工效率可以减小由土体蠕变引起的基坑变形，并降低施工风险。结合上海西站15号线地铁车站基坑工程，采用基于软土蠕变模型数值分析方法，研究了土方开挖运输效率对运营高铁和基坑围护结构变形的影响。结果表明：采用高效运输设备提高施工效率30%后，基坑围护结构最大水平变形可以减小15%，顶板最大沉降减小20%。
- 逆作法 /
- 运营铁路 /
- 蠕变 /
- 变形 /
- 相互影响
Abstract: The deep excavation of Metro Line No. 15 of West Shanghai Railway Station traverses Shanghai-Nanjing Railway. By using top-down method, deformation control of railway subgrade and diaphragm walls are highly demanded. Construction environment of this excavation is complex. Besides difficult excavation and transport of soil, its efficiency is low. During excavation, creep behavior is obvious in soft soil, so improving the construction efficiency will decrease diaphragm walls deflection caused by soil creep and lower the risk during construction. A soft soil creep model is adopted to simulate the effects on deflection behavior of high-speed railway and diaphragm walls with different conveying efficiencies in this excavation. The results show that, the maximum horizontal displacement of retaining structures decreases by 15% and the maximum settlement of roof decreases by 20% when the conveying efficiency is improved by 30%. |
- top-down method /
- operating railway /
- creep /
- deformation /
- interaction

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参考文献(8)

[1]	刘建航, 刘国彬, 范益群. 软土基坑工程中时空效应理论与实践(上)[J]. 地下工程与隧道, 1999(3): 7–12. (LIU Jian-hang, LIU Guo-bin, FAN Yi-qun. The theory and its practice by using the rule of time-space effect in soft soil excavation[J]. Undergrourd Engineering and Tunnels, 1999(3): 7–12. (in Chinese))
[2]	刘建航, 刘国彬, 范益群. 软土基坑工程中时空效应理论与实线(下)[J]. 地下工程与隧道, 1999(4): 10–14. (LIU Jian-hang, LIU Guo-bin, FAN Yi-qun. The theory and its practice by using the rule of time-space effect in soft soil excavation[J]. Undergrourd Engineering and Tunnels, 1999(4): 10–14. (in Chinese))
[3]	汪中卫, 刘国彬, 王旭东, 等. 复杂环境下地铁深基坑变形行为的实测研究[J]. 岩土工程学报, 2006, 28(10): 1263–1266. (WANG Zhong-wei, LIU Guo-bin, WANG Xu-dong, et al. Study on the deformation of a deep metro excavation under complex environment[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(10): 1263–1266. (in Chinese))
[4]	庄丽, 周顺华, 宫全美, 等. 大面积软土基坑放坡开挖引起蠕变的数值分析[J]. 岩石力学与工程学报, 2006, 25(增刊2): 4209–4214. (ZHUANG Li, ZHOU Shun-hua, GONG Quan-mei, et al. Numerical analysis of creep induced by excavating slope in soft soil pit with large area[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S2): 4209–4214. (in Chinese))
[5]	HSIUNG Bin-Chen Benson. A case study on the behaviour of a deep excavation in sand [J]. Computers and Geotechnics, 2009, 36: 665–675.
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[7]	刘映晶, 陈锦剑, 王建华, 等. 基坑逆作施工与上部运营铁路的相互影响分析[J]. 岩土工程学报, 2010, 32(增刊1): 142–145. (LIU Ying-jing, CHEN Jin-jian, WANG Jian-hua, et al. Interaction between the top-down subsurface excavation and upside running railway[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 142–145. (in Chinese))
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文章访问数: 1011
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逆作土方运输效率对运营高铁和基坑变形的影响 English Version

作者简介: 李明广(1987– )，男，重庆人，博士生，主要从事岩土工程、地下工程等领域数值试验工作。

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出版历程

Influences of efficient transport technology of earthwork on operating railways and deformation of excavations using top-down method

计量

出版历程

目录

作者简介:
李明广(1987– )，男，重庆人，博士生，主要从事岩土工程、地下工程等领域数值试验工作。