邓肯- 张参数对基坑支护结构变形的敏感性研究

邓成发; 翟守俊; 胡广伟

邓肯- 张参数对基坑支护结构变形的敏感性研究

1.
浙江省水利河口研究院杭州 310020;
2.
浙江省水利水电勘测设计院杭州 310002;
3.
合肥市勘察设计有限公司合肥 230001

详细信息

作者简介:
邓成发,主要从事岩土工程方面的研究.Email:75811680@hhu.edu.cn

中图分类号: TU473
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- 文章访问数: 3195
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- 被引次数: 0
出版历程
- 收稿日期: 2007-08-30
- 修回日期: 2007-11-12
- 刊出日期: 2008-10-30

SENSIBIL ITY ANALYSES OF THE DUNCAN - CHANG MODEL PARAMETERS TO DEFORMATION OF SUPPORTING STRUCTURE FOR FOUNDATION PIT

1.
Zhejiang Institute of Hydraulics &|Estuary, Hangzhou 310020;
2.
Zhejiang Design Institute ofW ater Conservancy &|Hydro - Electric Power, Hangzhou 310002;
3.
Hefei Investigation and Design CO. LTD, Hefei 230001

摘要

摘要: 有限单元法是计算基坑开挖支护结构变形的常见的数值计算方法,其土体模型参数的准确性是计算结果可靠性高的保证。邓肯- 张E-模型是岩土工程分析计算中常用的一种非线性弹性模型。本文以双排桩支护结构为例,针对模型参数敏感性进行大量非线性有限元计算,计算结果表明:影响基坑支护结构变形的主要参数为k、G、Rf和n,随着G、Rf和n的增大,侧向位移增大;随着k的增大,侧向位移减小。对于弯矩而言,参数的变化对弯矩的影响较小。从整体来看,邓肯- 张参数对侧向位移的敏感性要大于对弯矩的敏感性。
- 邓肯- /
- 张E-模型 /
- 敏感性分析 /
- 基坑 /
- 有限元
Abstract: Soilmodel parameters are critical in assuring reliability of numerical results of commonly used finite elementmethod for simulating deformation of supporting structure for deep foundation p it. The Duncan - Chang E- model, a nonlinear elastic modelwidely used in the geotechnical engineering, is chosen in this paper. A retaining structure with double - row p iles is used as an examp le for the sensibility analyses. The results show that the main parameters influencing the deformation of supporting structure are k、G、Rf and . The increase of G、Rf or n can result in an increase in the disp lacement and the increase of k can result in the decrease of the disp lacement. On the whole, the sensibility of the Duncan - ChangModel Parameters to the disp lacement is greater than the sensibility to the moment in the structure.
- Duncan - Chang E-model /
- Sensitivity analysis /
- Foundation p it /
- Finite elementmethod /
- p iles

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参考文献(1)

[1] 陈斌,吉林,张旭晖. 邓肯模型参数敏感性分析
[J]. 华北水利水电学院学报, 2002, 23 (4) : 10～13. Chen Bin, J i Lin, Zhang Xuhui. Sensitivity analysis of duncan model′s parameters. Journal of North China Insititute of Water Conservancy and Hydroelectric Power, 2002, 23 (4) : 10～13.

[2] Duncan, J.M. , Chang,C. Y. Nonlinear analysis of stress and strain in soils
[J]. SoilMechanics of Foundation, 1970, 637～659.

[3] 梅传书,徐海峰,严驰. 深基坑开挖的有限元模拟与实验研究
[J]. 水文地质工程地质, 2002, (5) : 8～11. Mei Chuanshu, Xu Haifeng, Yan Chi. Finite element simulation and experimental study of deep foundation p it excavation. Hydrology Geology and Engineering Geology, 2002, (5) : 8～11.

[4] 梅传书,严驰,陆红,等. 高层建筑基坑开挖的数值分析研究及工程应用分析
[J]. 建筑结构学报, 2001, 22 (3) : 81～87. Mei Chuanshu, et al. . Study on the foundation p it excavation of highrise building by finite elementmodel and its app lication analysis. Journal of Building Structures, 2001, 22 (3) : 81～87.

[5] 赵志远. 考虑土体结构性的修正邓肯- 张模型
[D]. 杭州:浙江大学, 2003. Zhao Zhiyuan. Modified Duncan - Chang model considering soil structure. Hangzhe: Zhejiang University, 2003.

[6] 张芳枝,陈晓平,吴煌峰,等. 风化泥质软岩变形特性及邓肯模型参数的试验研究
[J]. 岩土力学, 2003, 24 (4) : 610～613. Zhang Fangzhi, et al. . Experimental study on deformation p roperties and duncan model parameters of soft clayey rocks. Rock and SoilMechanics, 2003, 24 (4) : 610～613.

[7] 何颐华,杨斌,金宝森,等. 双排护坡桩试验与计算研究
[J]. 建筑结构学报, 1996, 17 (2) : 58～66. He Yihua, et al. . A study on the test and calculation of double - row fender piles. Journal of Building Structures, 1996, 17 (2) : 58～66.

[8] 蔡袁强,等. 软土地基深基坑中双排桩式围护结构的有限元分析
[J]. 浙江大学学报, 1997, 31 (4) : 442～447. Cai Yuanqiang, Zhao Yongqian, Wu Shiming, et al. . FEM analysis of the deep pit excavation with retaining structure of the double piles in soft clay. Journal of ZhejiangUniversity, 1997, 31 (4) : 442～447.

[9] 牛建东,徐林荣. 邓肯- 张E - B模型参数对软土路堤沉降计算结果的影响
[J]. 工程地质学报, 2005, 13 (4) : 563～568. Niu J iandong, et al. . Effects of the Duncan - Chang E - B model parameters on numerical results of settlement of the soft embankment. Journal of Engineering Geology, 2005, 13 (4) : 563～568.

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