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
• 负责人: NAKAI Teruo
• 金额: $ 10.7万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360224/
• 关键词: tunnel; retaining wall; excavation; model test; finite element analysis; constitutive model; existing building load; construction sequnce; モデル実験; 土圧; 周辺構造物; 有限要素法; 構成モデル; 弾塑性; 山留め掘削; トンネル掘削; 土の構成モデル; 3次元効果; 構造物荷重

To investigate the deformation mechanism and earth pressure of the ground in excavation problems such as tunneling and braced open excavation, 2D and 3D model test and the corresponding elastoplastic finite element analyses have been carried out. The effect of existing building loads with foundation is also investigated for both types of excavation problems. From the model tests and numerical analyses, the contents of the present research can be summarized as follows :(1) Finite element analyses using the constitutive model in which typical stress-strain behavior of soils are properly taken into consideration can predict well the deformation and failure of the ground qualitatively and qunatatively.(2) The present analysis can describe well the influences of construction sequence and existing building load on the deformation of ground.(3) By carrying out soil-water coupled analysis, it is revealed that the generation and dissipation of pore water pressure in the ground influence on the ground behavior very much.(4) Through the comparison between the present results and the result by ordinary methods, the problem and limitation of present design methods are discussed.

为了研究隧道开挖和开挖支撑等开挖问题中的地表变形机理和土压力，进行了二维和三维模型试验及相应的弹塑性有限元分析。对于这两种类型的开挖问题，也研究了既有建筑物地基荷载的影响。通过模型试验和数值分析，本文的研究内容可概括为：(1)采用适当考虑土的典型应力-应变特性的本构模型进行有限元分析，可以较好地定性和定性地预测地基的变形和破坏。(2)本文的分析可以很好地描述施工顺序和既有建筑物荷载对地基变形的影响。(3)通过进行土-水耦合分析，可以很好地描述施工顺序和既有建筑物荷载对地基变形的影响。结果表明，地基中孔压的产生和消散对地基性状有很大的影响。(4)通过与常规方法计算结果的比较，讨论了现有设计方法存在的问题和局限性。

项目成果

Influence of wall deflection process and wall deflection mode in retaining wall problems

挡土墙问题中墙体挠度过程和墙体挠度模式的影响

• 发表时间: 2005
• 期刊: Proc of 2nd China-Japan Geotechnical Symposium 1
• 作者: J. Takemura;J. Izawa;R. Igarashi;M. Masuda;M. Okamura;田畑 佑介 他;E.S.Sung et al.;増田 雅士・岡村 未対;E.Sung 他;森藤・安原・岡村・河内;T.Nakai 他
• 通讯作者: T.Nakai 他

Ground movement and earth pressure due to circular tunneling:model tests and numerical simulations

圆形隧道开挖引起的地面移动和土压力：模型试验和数值模拟

• 发表时间: 2008
• 期刊: Proc.of the 6th in ternational symposium ongeotechnical aspects of underground constructionin soft ground (IS-Shanghai 2008) 2
• 作者: H.M.Shahin;T.Nakai;F.Zhang;M.Kikumoto;Y.Tabata andE.Nakahara
• 通讯作者: Y.Tabata andE.Nakahara

Simulation of conventional and inverted braced excavation using subloading tij model

使用次加载 tij 模型模拟常规和倒支撑开挖

• 发表时间: 2007
• 期刊: Soils and Foundations 47(3)
• 作者: T. Nakai;M. M. Farias;D. Bastos and Y.Sato
• 通讯作者: D. Bastos and Y.Sato

3D model tests and numerical simulation in shallow tunneling considering existing piled raft

考虑现有桩筏的浅埋隧道3D模型试验和数值模拟

• 发表时间: 2007
• 期刊: Proc. the 13^<th> ARCSMGE (印刷中)
• 作者: Mitsu;Okamura;H.M.Shahin et al.
• 通讯作者: H.M.Shahin et al.

Simulations of tunnel excavation in 2D and 3D conditions considering building loads

考虑建筑荷载的 2D 和 3D 条件下隧道开挖模拟

• 发表时间: 2005
• 作者: T. Nakai;E. Sung;H. M. Shahin;M. Yamamoto
• 通讯作者: M. Yamamoto