止水帷幕的挡土作用对深基坑变形的影响

陈鹏飞; 龚晓南; 刘念武

doi:10.11779/CJGE2014S2044

止水帷幕的挡土作用对深基坑变形的影响 English Version

陈鹏飞^{1, 2},
龚晓南^{1, 2},
刘念武^{1, 2}

1. 浙江大学滨海和城市岩土工程研究中心,浙江杭州 310058;
2. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州 310058

详细信息

作者简介:
陈鹏飞(1989- ),男,硕士研究生,主要从事基坑工程、地基处理等方面的研究。E-mail: 1275946789@qq.com。

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

Effect of curtain’s role in retaining on deformation of deep excavations

CHEN Peng-fei^{1, 2},
GONG Xiao-nan^{1, 2},
LIU Nian-wu^{1, 2}

1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 基坑围护结构主要起挡土和止水的作用。现行计算方式大多认为挡土结构承担水土压力,止水帷幕防止地下水渗入坑内,一般不考虑止水帷幕的挡土作用。实际应用上水土压力首先传递给帷幕,再间接传递给灌注桩。如果把二者作为一个整体的围护结构,帷幕的存在增加了整体的刚度和重量,进而起到增加整体稳定性的作用。理论和实践表明,帷幕具有一定的挡土作用。分别研究了搅拌桩深度、排数、弹性模量取值以及搅拌桩与灌注桩之间的距离对基坑变形的影响。帷幕深度从基坑开挖深度增加到灌注桩深度的过程中,基坑侧向位移减小量明显,帷幕深度继续增加时,基坑侧向位移会继续减小,但减小量不明显。帷幕排数的增加使得基坑侧向变形明显减小,特别是从两排增加到三排时,侧向变形减小量很大。
- 止水帷幕 /
- 挡土作用 /
- 基坑侧壁 /
- 排桩
Abstract: The two main functions of cement mixing piles are retaining and sealing in protecting foundation excavations. The current methods believe that the retaining structures bear the pressure of soil and water and the sealing curtain prevents groundwater from infiltrating pit. Generally they do not consider the effect of curtain on the decreasing deformation. First, soil and water pressure deliver to the curtain, and then pass to the bored pile indirectly. If the two parties are regarded as a whole envelope, the curtain will increase the overall stiffness and weight, thereby increase the overall stability. The effects of various water-resisting curtain depths, water-resisting curtain rows, distances from water-resisting curtain to bored pile and physico-mechanical parameters of water-resisting curtain on normalized wall deflections are studied. When the curtain depth increases from the excavation depth to bored pile length, the lateral displacement of foundation pit decreases significantly. As the curtain depth continues to increase, the lateral displacement of foundation pit will continue to decrease, but the reduction is not obvious. When the rows of curtain increase, the lateral displacement of foundation pit decreases significantly. Especially from two rows to three rows, there is a large percent of decrease.
- water-resisting curtain /
- soil retaining /
- side of foundation pit /
- contiguous pile wall

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参考文献(13)

[1]	龚晓南. 基坑工程实例[M]. 北京: 中国建筑工业出版社, 2010. (GONG Xiao-nan. Example of excavation[M]. Beijing: China Architecture and Building Press, 2010. (in Chinese))
[2]	刘溢, 李镜培, 陈伟. 被动区深层搅拌桩加固对超大深基坑变形的影响[J]. 岩土工程学报, 2012, 34(11): 465-469. (LIU Yi, LI Jing-pei, CHEN Wei. Effect of reinforcement of deep mixing piles on deformation of ultra-deep excavation in passive zone[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(11): 465-469. (in Chinese))
[3]	邓永锋, 刘松玉, 洪振舜. 高速公路工程中水泥搅拌桩桩身合理设计强度研究[J]. 工程地质学报, 2006, 14(4): 538-541. (DENG Yong-feng, LIU Song-yu, HONG Zhen-shun. Finite element analysis for optimal design of deep mixed column foundation in highway embankments[J]. Journal of Engineering Geology, 2006, 14(4): 538-541. (in Chinese))
[4]	邓子胜. 考虑止水帷幕挡土作用的基坑支护设计实例[J]. 五邑大学学报(自然科学版), 2007, 21(1): 21-24. (DENG Zi-sheng. A case study of foundation pit support design with considerations for the retaining and waterproof wall[J]. Journal of Wuyi University (Natural Science Edition), 2007, 21(1): 21-24. (in Chinese))
[5]	李欣, 黄博. 考虑止水帷幕挡土作用的围护结构分析[J]. 低温建筑技术, 2004(2): 55-57. (LI Xin, HUANG Bo. Analysis on the retating structure with consideration of the retaining contribution of water-resisting curtain[J]. Low Temperature Construction Technology, 2004(2): 55-57. (in Chinese))
[6]	丁洲祥, 龚晓南, 俞建霖, 等. 高止水帷幕对基坑环境效应影响的有限元分析[J]. 岩土力学, 2005, 26(5): 146-150. (DING Zhou-xiang, GONG Xiao-nan, YU Jian-lin, et al. Finite element analysis of environmental effects of waterproof wall on foundation pit[J]. Rock and Soil Mechanics, 2005, 26(5): 146-150. (in Chinese))
[7]	卢智强, 冯晓腊, 王超峰. 悬挂式止水帷幕对基坑降水的影响[J]. 隧道建设, 2006, 26(5): 5-7. (LU Zhi-qiang, FENG Xiao-la, WANG Chao-feng. Effects of pensile curtains on dewatering of foundation pits[J]. Tunnel Construction, 2006, 26(5): 5-7. (in Chinese))
[8]	李彦东, 梁发云, 褚峰, 等. 软土地区深基坑变形特性三位数值模拟与验证[J]. 地下空间与工程学报, 2011, 7: 74-78. (LI Yan-dong, LIANG Fa-yun, ZHU Feng, et al. 3D Numercal Simulation on the Deformation Behaviour of Deep Excavation in Soft Soils and Its Verification[J]. Chinese Journal of Underground Space and Engineering, 2011, 7: 74-78. (in Chinese))
[9]	李大勇, 龚晓南, 张土乔. 深基坑工程中地下管线位移影响因素分析[J]. 岩石力学与工程学报, 2001, 20(增刊1): 1083-1087. (LI Da-yong, GONG Xiao-nan, ZHANG Tu-qiao. Analysis on impact of excavation of deepfoundation pits on buried pipelines[J]. Chinese Journal of Rock Mechanics and Engineering, 2001, 20(S1): 1083-1087. (in Chinese))
[10]	刘建航. 基坑工程手册[M]. 北京: 中国建筑工业出版社, 1997. LIU Jian-hang. Pit engineering manual[M]. Beijing: China Architecture and Building Press, 1997. (in Chinese))
[11]	杨敏, 周洪波, 杨桦. 基坑开挖与邻近桩基相互作用分析[J]土木工程学报, 2005, 38(4) : 91-96. YANG Min,ZHOU Hong-bo, YANG Hua. Numerical analysis of pile response due to unsupported excavation-induced later soil movement[J]. China Civil Engineering Journal, 2005, 38(4): 91-96. (in Chinese))
[12]	俞建霖, 龚晓南. 基坑工程变形性状研究[J]. 土木工程学报, 2002, 35(4): 86-90. (YU Jian-lin, GONG Xiao-nan. Research on deformation of foundation pit engineering[J]. China Civil Engineering Journal, 2002, 35(4): 86-90. (in Chinese))
[13]	黄宏伟. 深基坑内加固与墙体侧向位移的相互影响实测分析[J].建筑结构, 2000, 30(11): 55-57. (HUANG Hong-wei. Interaction analysis on consolidation of soil and lateral deformation of retaining wall in excavation pit[J]. Building Structure, 2000, 30(11): 55-57. (in Chinese))

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止水帷幕的挡土作用对深基坑变形的影响 English Version

作者简介: 陈鹏飞(1989- ),男,硕士研究生,主要从事基坑工程、地基处理等方面的研究。E-mail: 1275946789@qq.com。

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出版历程

Effect of curtain’s role in retaining on deformation of deep excavations

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出版历程

目录

作者简介:
陈鹏飞(1989- ),男,硕士研究生,主要从事基坑工程、地基处理等方面的研究。E-mail: 1275946789@qq.com。