深圳机场填海区欠固结软基超大深基坑的设计

马驰; 刘国楠

深圳机场填海区欠固结软基超大深基坑的设计 English Version

马驰,
刘国楠

(中国铁道科学研究院深圳研究设计院，深圳 518034）

详细信息

作者简介:
马驰(1980– )，男，博士研究生，助理研究员、主要从事基坑支护、地基处理等方面的工程设计、技术咨询工作。

中图分类号: TU413
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出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Design of large and deep excavation in underconsolidated soils in reclaimed areaof Shenzhen Airport

MA Chi,
LIU Guo-nan

(Shengzhen Research and Design Institute of China Academy of Railway Sciences, Shenzhen 100081, China)

摘要

摘要: 在欠固结的软基中开挖深基坑的技术难度和风险很大。以深圳机场扩建工程轨道交通枢纽基坑工程为背景，分析了有深厚淤泥层的填海地区大型基坑的难点及相应对策，介绍了该基坑咬合桩+锚碇、锚索的支护方案；在设计中采用淤泥层排水固结强度增长规律取用强度指标，结合锚碇、锚索的受力特征对围护结构做了有限元计算分析；基坑监测结果表明计算结果与实际相符，验证了支护设计安全、合理。|
- 欠固结软土 /
- 基坑 /
- 固结强度增长 /
- 锚碇 /
- 咬合桩 /
- 　　
Abstract: The excavation of deep foundation pits in underconsolidated soils has been a problem in the field of geotechnical engineering. Based on the excavation of rail transport hub of Shenzhen Airport, the excavation difficulties and countermeasures in soft soils are analyzed piles. The supporting scheme of interlocking anchors, and cables is introduced. The increase law of consolidation of silt is adopt to estimate its strength. Combine with the stresses of anchors and cables the finite element analysis is performed. The monitoring results show that the calculated results agree with the measured ones. The safety and rationality of the supporting design are validated.|
- underconsolidated soft soil /
- excavation /
- consolidation strength increase /
- anchorage /
- interlocking pile /
- undefined

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参考文献(9)

[1]	王卫东, 吴江斌, 黄绍铭. 上海地区建筑基坑工程的新进展与特点[J]. 地下空间与工程学报, 2005, 1(4): 547–553. (WANG Wei-dong, WU Jiang-bin, HUANG Shao-ming. Recent progress and characteristic of pit foundation in Shanghai[J]. Chinese Journal of Underground Space and Engineering, 2005, 1(4): 547–553. (in Chinese))
[2]	中国铁道科学研究院深圳研究设计院. 深圳机场新航站区轨道交通枢纽围护结构设计文件[R]. 深圳: 中国铁道科学研究院深圳研究设计院, 2008. (Shenzhen Research and Design Institute of China Academy of Railway Sciences. Shenzhen project design of the excavation supporting of Xiangjiang Time Plaza near the metro[R]. Shenzhen: Shenzhen Research and Design institute of China Academy of Railway Sciences, 2004. (in Chinese))
[3]	林孔锱. 地基单向和三向排水固结与强度增长的计算及其实际观测[J]. 岩土工程学报, 1987, 9(1): 87–98. (LIN Kong-zi. Computation and measurement of settement and strength increase of subsoils due to one and three dimensional consolidation[J]. Chinese Journal of Geotechnical Engineering, 1987, 9(1): 87–98. (in Chinese))
[4]	齐永正, 赵维炳. 排水固结加固软基强度增长理论研究[J].水利水运工程学报, 2008(2): 78–83. (QI Yong-zheng, ZHAO Wei-bing. Drainage consolidation of soft foundation reinforcement strength increasing theory research[J]. Hydro-Science and Engineering, 2008(2): 78–83. (in Chinese))
[5]	胡亚元, 陈云敏. 本构模型与软黏土强度增长的关系研究[J]. 浙江大学学报(工学版), 2004, 38(6): 731–735. (HU Ya-yuan, CHEN Yun-min. Research on correlation between soil model and shear streagth gain in staged construstion[J]. Journal of Zhejiang University (Engineering Science), 2004, 38(6): 731–735. (in Chinese))
[6]	孔德金, 苗中海. 软黏土抗剪强度增长规律[J]. 岩土工程学报, 1999, 21(6): 757–759. (KON G De-jin, MIAO Zhong-hai. The regularity ofshear st rength increment fo r soft soil[J]. Chinese Journal of Geotechnical Engineering, 1999, 20(6): 757–59. (in Chinese))
[7]	魏汝龙. 软黏土的强度与变形[M]. 人民交通出版社, 987. (WEI Ru-long. The strength and deformation of soft clay[M]. Beijing: China Communications Press, 1987. (in Chinese))
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深圳机场填海区欠固结软基超大深基坑的设计 English Version

作者简介: 马 驰(1980– )，男，博士研究生，助理研究员、主要从事基坑支护、地基处理等方面的工程设计、技术咨询工作。

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出版历程

Design of large and deep excavation in underconsolidated soils in reclaimed areaof Shenzhen Airport

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出版历程

目录

作者简介:
马驰(1980– )，男，博士研究生，助理研究员、主要从事基坑支护、地基处理等方面的工程设计、技术咨询工作。