基于Duncan-Chang模型的地基沉降分层总和 分析方法探讨

中国医学大学

2013, Vol. 47

Issue (6): 643-649

石油开发

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基于Duncan-Chang模型的地基沉降分层总和分析方法探讨

曹文贵, 邓湘君, 张超

湖南大学岩土工程研究所，湖南长沙 410082

Layerwise summation method for ground foundation settlement based on Duncan-Chang constitutive model

CAO Wen-gui, DENG Xiang-jun, ZHANG Chao

Geotechnical Engineering Institute of Hunan University, Changsha 410082, China

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摘要地基沉降分析方法是土力学研究的重要内容。该文在地基沉降变形力学机理研究基础上，首先考虑埋深或初始地应力即先期固结应力对地基土变形模量的影响，并将其区分为初始地应力的体积应力和偏应力影响两部分，引进分级加载思想，建立出不同埋深地基土变形模量的确定方法；其次，将地基沉降区分为附加体积应力和附加偏应力引起的沉降两部分，建立出地基沉降分析计算模型；然后，考虑地基变形的非线性变化特征，引进增量分析方法、虎克定律和Duncan-Chang模型，建立出附加体积应力和附加偏应力引起的地基压缩层变形的分析方法，并利用地基沉降分层总和法分析原理，建立出基于Duncan-Chang模型的地基沉降分析新方法。该方法不仅可以反映初始地应力和附加应力对地基土变形模量的影响，而且，可避免地基土压缩试验曲线和地基静载试验曲线的使用；最后，通过工程实例计算与分析，并与实测沉降值和现有分析方法的计算结果进行比较，表明了该方法可以满足工程计算精度要求，具有一定的合理性与可行性。

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关键词 ：地基, 沉降, 分层总和法, Duncan-Chang模型, 分级加载, 体积应力, 偏应力, 变形模量

收稿日期: 2012-07-12

ZTFLH:

TU44

基金资助:基金项目：国家自然科学基金项目（51078137）；高等学校博士学科点专项科研基金项目（20090161110005）

作者简介: 作者简介：曹文贵(1963-)，男，湖南南县人，博士（后），教授，博士生导师，主要从事岩土工程教学与研究工作。E-mail: cwglyp@21cn.com。

引用本文:

曹文贵, 邓湘君, 张超. 基于Duncan-Chang模型的地基沉降分层总和分析方法探讨[J]. 中国医学大学, 2013, 47(6): 643-649.
CAO Wen-gui, DENG Xiang-jun, ZHANG Chao. Layerwise summation method for ground foundation settlement based on Duncan-Chang constitutive model. Journal Of China Medical University, 2013, 47(6): 643-649.

链接本文:

http://192.168.0.151:8080/Jwk_cyfdj/CN/ 或 http://192.168.0.151:8080/Jwk_cyfdj/CN/Y2013/V47/I6/643

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