硬化土模型在淤泥土层参数反分析中的应用与研究
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- 英文论文题名：Application and Research of the Hardening Soil Model in the Inverse Analysis for Parameters of the Silt Soil
- 论文作者：刘关虎 ; 崔江余 ; 徐西彬 ; 王利民
- 英文论文作者：Liu Guanhu ; Cui Jiangyu ; Xu Xibin ; Wang Limin ; School of Civil Engineering ; Beijing Jiaotong University ; BECG Civil Engineering Co. ; Ltd.
- 年：2016
- 作者机构：北京交通大学土木建筑工程学院;北京建工土木工程有限公司;
- 论文关键词：硬化土模型 ; 淤泥土层 ; 均匀设计(UD) ; 有限元分析 ; 参数反分析
- 英文论文关键词：hardening soil model ; silt soil ; uniform design ; finite element analysis ; reverse analysis of soil parameter
- 会议召开时间：2016-12-02
- 会议录名称：第十一届建筑物改造与病害处理学术研讨会暨第六届工程质量学术会议论文集
- 语种：中文
- 分类号：TU447;TU753
- 学会代码：SGJS
- 会议名称：第十一届建筑物改造与病害处理学术研讨会暨第六届工程质量学术会议
- 会议地点：中国海南海口
- 主办单位：中国老教授协会土木建筑专业委员会、中国土木工程学会工程质量分会、北京交通大学土木建筑工程学院
- 学会名称：施工技术编辑部
- 页数：4
- 文件大小：475k
- 原文格式：O
- 会议级别：全国
摘要
基坑开挖是一个卸荷过程,其应力路径复杂,选择合适的土体本构模型是基坑开挖数值模拟计算的关键问题。硬化土模型(H-S)是一种可以模拟包括软土和硬土在内的不同类型的土体行为的先进模型,它考虑了卸荷效应,能够反映土体应力路径的影响。本构模型的应用关键在于计算参数的选取,硬化土(H-S)模型有11个参数,本文对其参数的选取做了介绍,并总结了国内外各地区不同土层E_(50)~(ref),E_(oed)~(ref),E_(ur)~(ref),E_s之间的相互关系。结合珠海地区淤泥土层基坑工程,采用均匀设计(UD)与Plaxis有限元软件计算相结合的方法,将其数值计算结果与实测结果进行对比,对该地区淤泥土层的3个未知刚度参数进行反分析,计算结果表明硬化土模型能较好地模拟软土地区基坑变形特性,也说明采用均匀设计(UD)与Plaxis有限元软件计算进行未知参数反分析的有效性。
Foundation excavation is an unloading process.It has the complex stress path.It is the key to select the appropriate soil constitutive mode(H-S) for the numerical simulation of foundation excavation.Hardening soil constitutive model is an advanced model which can simulate the different types of soil behavior,including soft soil and hard soil.It takes into account the unloading effect and reflects the influence of stress path of soil.Calculation parameter selection is the key of the using of the constitutive model.The hardening soil(H-S) model has eleven parameters.In this paper,the selection of its parameters is presented and the relationship among E_(50)~(ref),E_(oed)~(ref),E_(ur)~(ref),and E_s,of different soil regions at home and abroad are summarized.The method which combines the uniform design(U D) and the calculation of the Plaxis finite element software is used in the foundation excavation of Zhuhai.The numerical results are compared with the measured results.The three unknown stiffness parameters of the silt soil layer in this region are conducted the inverse analysis.The calculation results show that the hardening soil model can better simulate the deformation characteristics of foundation excavation in soft soil area.It also shows that the effectiveness of using uniform design(UD) and Plaxis finite element software to conduct the inverse analysis.
Foundation excavation is an unloading process.It has the complex stress path.It is the key to select the appropriate soil constitutive mode(H-S) for the numerical simulation of foundation excavation.Hardening soil constitutive model is an advanced model which can simulate the different types of soil behavior,including soft soil and hard soil.It takes into account the unloading effect and reflects the influence of stress path of soil.Calculation parameter selection is the key of the using of the constitutive model.The hardening soil(H-S) model has eleven parameters.In this paper,the selection of its parameters is presented and the relationship among E_(50)~(ref),E_(oed)~(ref),E_(ur)~(ref),and E_s,of different soil regions at home and abroad are summarized.The method which combines the uniform design(U D) and the calculation of the Plaxis finite element software is used in the foundation excavation of Zhuhai.The numerical results are compared with the measured results.The three unknown stiffness parameters of the silt soil layer in this region are conducted the inverse analysis.The calculation results show that the hardening soil model can better simulate the deformation characteristics of foundation excavation in soft soil area.It also shows that the effectiveness of using uniform design(UD) and Plaxis finite element software to conduct the inverse analysis.
引文
[1]王卫东,王浩然,徐中华.基坑开挖数值分析中土体硬化模型参数的试验研究[J].岩土力学,2012,33(8):2283-2290.
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[3]刘书斌,王春波,周立波,等.硬化土模型在无锡地区深基坑工程中的应用与分析[J].岩石力学与工程学报,2014,33(S1),3022-3028.
[4]谢建斌,曾宪明,胡井友,等.硬化土模型在桩锚与桩撑组合支护深基坑工程中的应用[J].岩土工程学报,2014,36(S2):56-63.
[5]江建红,崔江余.不同土体本构模型对基坑开挖数值模拟计算结果的影响分析[C]//第九届建筑物改造与病害处理学术研讨会,2011.
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[7]刘畅.考虑土体不同强度与变形参数及基坑支护空间影响的基坑支护变形与内力研究[D].天津:天津大学,2008.
[8]SCHANZT,VERMEERPA,BONNIERPG.Beyond2000in computational geotechnics,chapter formulation and verification of the hardening-soil model[M].Balkema:Potterdam,1991.
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[10]BENZT.Small-strain stiffness of soils and its numerical consequences[D].Stuttgart:University Stuttgart,2007.
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[2]李建伟,陈沅江,杜金龙.砂卵石地层基坑开挖土体本构模型辨识研究[J].地下空间与工程学报,2013,9(2):223-228.
[3]刘书斌,王春波,周立波,等.硬化土模型在无锡地区深基坑工程中的应用与分析[J].岩石力学与工程学报,2014,33(S1),3022-3028.
[4]谢建斌,曾宪明,胡井友,等.硬化土模型在桩锚与桩撑组合支护深基坑工程中的应用[J].岩土工程学报,2014,36(S2):56-63.
[5]江建红,崔江余.不同土体本构模型对基坑开挖数值模拟计算结果的影响分析[C]//第九届建筑物改造与病害处理学术研讨会,2011.
[6]北京金土木软件技术有限公司.PLAXIS岩土工程软件使用指南[M].北京:人民交通出版社,2010.
[7]刘畅.考虑土体不同强度与变形参数及基坑支护空间影响的基坑支护变形与内力研究[D].天津:天津大学,2008.
[8]SCHANZT,VERMEERPA,BONNIERPG.Beyond2000in computational geotechnics,chapter formulation and verification of the hardening-soil model[M].Balkema:Potterdam,1991.
[9]VERMEER P A,NEHER H P.A soft soil model that accounts for creep(Beyond 2000 in Computational Geotechnics-10 Years of PLAXIS International)[M].Balkema:Rotterdam,1999.
[10]BENZT.Small-strain stiffness of soils and its numerical consequences[D].Stuttgart:University Stuttgart,2007.
[11]宋广,宋二祥.基坑开挖数值模拟中土体本构模型的选取[J].工程力学,2014,31(5):86-94.