| 邓肯- 张参数对基坑支护结构变形的敏感性研究 |
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| 引用本文： | 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[J].工程地质学报(英文版),2008,16(5):605-610. |
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| 作者姓名： | 邓成发 翟守俊 胡广伟 |
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| 作者单位： | 1.浙江省水利河口研究院 杭州 310020; |
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| 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。
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| 关 键 词： | 邓肯- 张E-模型 敏感性分析 基坑 有限元 |
| 收稿时间： | 2007-08-30 |
SENSIBILITY ANALYSES OF THE DUNCAN-CHANG MODEL PARAMETERS TO DEFORMATION OF SUPPORTING STRUCTURE FOR FOUNDATION PIT |
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| Institution: | 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 |
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| 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. |
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