IMPORTANCE OF SOIL DILATANCY AND 3D EFFECTS IN BRACED EXCAVATION BPROBLEMS AND ITS APPLICATION TO STRESS-DEFORMATION ANALYSIS

土体剪胀性和三维效应在支撑开挖 B 问题中的重要性及其在应力变形分析中的应用

基本信息

  • 批准号:
    14350257
  • 负责人:
  • 金额:
    $ 7.94万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2002
  • 资助国家:
    日本
  • 起止时间:
    2002 至 2003
  • 项目状态:
    已结题

项目摘要

How to predict the surface settlements of the ground and how to evaluate the earth pressure on the braced wall are serious problems at open excavation in urban area. However, in the present practical methods, the earth pressure is usually predicted by conventional methods such as a frame model together with Rankine's earth pressure theory. There is also no appropriate method to predict the surface settlements of ground-usually empirical method and/or elastic finite element method are commonly used. In addition to this, finite element analysis is usually carried out assuming two-dimensional condition such as plane strain condition. The ground movements and earth pressure are much influenced by the construction sequence including three-dimensional effect, which are not considered in these conventional methods.This research has been carried out to investigate the ground movements and the earth pressures during braced excavation and devise proper and economic open excavation methods in urban area. For this purpose, we carried out elastoplastic finite element analyses in which the mechanical behavior of soils, structures and interface between soil and structure are properly taken into consideration, together with the corresponding model tests. Main contents of the present research can be summarized as follows :●Investigate the influence of the stiffness of wall and strut on surface settlements and earth pressure due to braced excavation●Investigate the influence of excavation sequence (including the arrangement of struts) on the surface settlements and earth pressure.●Verify the usefulness of a newly proposed exaction method, in which no strut is used in excavation and temporary retaining wall is used as a part of permanent structure.●Characterize three-dimensional effects of tunnel excavation on surface settlements and earth pressure.
如何预测地表沉降和评价支撑墙土压力是城市地区明挖施工中面临的重要问题。然而,在目前的实际方法中,通常采用框架模型等传统方法结合朗肯土压力理论来预测土压力。也没有合适的方法来预测地表沉降,通常采用经验法和/或弹性有限元法。除此之外,有限元分析通常在假设平面应变条件等二维条件下进行。地震动和土压力受施工顺序(包括三维效应)的影响很大,而这些传统方法没有考虑到这些因素。本研究旨在研究城市地区支撑开挖过程中的地震动和土压力,并设计适当且经济的露天开挖方法。为此,我们进行了弹塑性有限元分析,其中适当考虑了土壤、结构以及土壤与结构之间界面的力学行为,并进行了相应的模型试验。目前研究的主要内容可概括如下: ●研究支撑开挖时墙体和支柱的刚度对地表沉降和土压力的影响;研究开挖顺序(包括支柱的布置)对地表沉降和土压力的影响。 结构。●表征隧道开挖对地表沉降和土压力的三维影响。

项目成果

期刊论文数量(32)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Prediction of lateral displacement and lateral flow of ground
地面横向位移和横向流动预测
檜尾 正也: "山留め壁打設方法と周辺地盤の変形挙動の関係についての解析的検討"第57回土木学会年次学術講演会. 3. 283-284 (2002)
日尾昌也:《挡土墙浇注法与周围地面变形行为关系的分析研究》第57届日本土木学会学术年会3. 283-284(2002年)。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Earth pressure and ground movements in 2D and 3D retaining wall problems-model tests an numerical simulation
2D 和 3D 挡土墙问题中的土压力和地面运动 - 模型测试和数值模拟
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T.Nakai et al.
  • 通讯作者:
    T.Nakai et al.
Field measurements in braced excavation and its finite element analysis
支护开挖现场测量及其有限元分析
  • DOI:
  • 发表时间:
    2002
  • 期刊:
  • 影响因子:
    0
  • 作者:
    N.Iwata;T.Nakai;H.Hinokio;K.Takegawa
  • 通讯作者:
    K.Takegawa
地盤の変形破壊予測における施行過程の大切さ
施工过程在预测地面变形和破坏方面的重要性
  • DOI:
  • 发表时间:
    2002
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Saeki;K;Wada;S.-I.;Shibata;M.;中井照夫
  • 通讯作者:
    中井照夫
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NAKAI Teruo其他文献

NAKAI Teruo的其他文献

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{{ truncateString('NAKAI Teruo', 18)}}的其他基金

Consistent modeling of time-dependent bahavior from normally consolidated soil to overconsokidated and naturally deposited soils
从正常固结土壤到超固结和自然沉积土壤的时间相关行为的一致建模
  • 批准号:
    15K14033
  • 财政年份:
    2015
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Study on a departure from 1948 model in geotechnical engineering
岩土工程偏离 1948 年模型的研究
  • 批准号:
    25289144
  • 财政年份:
    2013
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Schematization of constitutive models for geomaterials and coherent prediction of the deformation and failure on ground behaviors
岩土材料本构模型的示意图以及地面行为变形和破坏的一致预测
  • 批准号:
    22360184
  • 财政年份:
    2010
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Investigation of 3D deformation and failure mechanism of ground in excavation problems and development of efficient design systems
研究开挖问题中地面的 3D 变形和破坏机制并开发高效的设计系统
  • 批准号:
    17360224
  • 财政年份:
    2005
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
施工過程を考慮した浅層トンネル掘削技術の開発
考虑施工过程的浅埋隧道开挖技术开发
  • 批准号:
    12555141
  • 财政年份:
    2000
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Constitutive models for geomaterials considering induced anisotropy and density of soils and their application, to bearing capacity problems of foundation under various loading conditions
考虑诱发各向异性和土壤密度的岩土材料本构模型及其在不同荷载条件下地基承载力问题中的应用
  • 批准号:
    12650492
  • 财政年份:
    2000
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Stress-deformation behavior of ground under excavation and development of new design methods
开挖地基应力变形行为及新设计方法的开发
  • 批准号:
    10555165
  • 财政年份:
    1998
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Constitutive model for soil considering induced and inherent anisotropy
考虑诱发和固有各向异性的土壤本构模型
  • 批准号:
    04650437
  • 财政年份:
    1992
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Elasto-viscoplastic constitutive model for clay in three-dimensional stresses and its application to practical problems.
三维应力下粘土弹粘塑性本构模型及其在实际问题中的应用。
  • 批准号:
    61550355
  • 财政年份:
    1986
  • 资助金额:
    $ 7.94万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
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