Investigation on earth pressure on urban NATM tunnels

城市新奥法隧道土压力研究

• 批准号: 12650495
• 负责人: AKUTAGAWA Shinichi
• 金额: $ 2.69万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650495/
• 关键词: shallow tunnel; nonlinear analysis; subsidence; トンネル; NATM; 崩壊; 室内実験

A nonlinear finite element analysis procedure was proposed for modeling a deformational behavior, which is unique to tunnels with shallow depth. An objective was to point out the importance of modeling a nonline ar nature of the deformational mechanism for obtaining a better understanding of design load on tunnel linings and its relation to kinematics of the surrounding ground. The results obtained showed that modeling of a ground behavior, which is essentially of nonlinear nature, by an elastic or elastic-perfectly plastic approach, leads to incorrect understanding of the deformational mechanism. The proposed approach produced strain distribution, deformational mechanism, surface settlement profile, ground reaction curve, which were in good agreement with the results of the model test. Use of the proposed approach would enable a better understanding of deformational characteristics of the ground medium not only in identifying local plastic zones, but also in revealing kinematics of movement of blocks formed between slip planes, or shear bands. This make s a good starting point for optimizing ground support for reducing surface settlement, considering a particular nature of the deformational mechanism of shallow tunnels.

针对浅埋隧道的变形特性，提出了一种非线性有限元分析方法。目的是指出对变形机制的非在线性质进行建模的重要性，以便更好地理解隧道衬砌的设计荷载及其与周围地面运动学的关系。结果表明，用弹性或弹-完全塑性方法来模拟具有非线性性质的地基行为，会导致对变形机理的错误理解。该方法得到的应变分布、变形机理、地表沉降剖面、地面反力曲线与模型试验结果吻合较好。使用所提出的方法将使我们更好地了解地面介质的变形特征，不仅在确定局部塑性区方面，而且在揭示滑移面或剪切带之间形成的块体的运动运动学方面。考虑到浅埋隧道变形机制的特殊性质，这为优化地面支护以减少地表沉降提供了一个良好的起点。

项目成果

Anil Swarup, Shinichi Akutagawa: "Application of back analysis in assessing the stability of an Indian tunnel"Proceedings of the International Symposium on Modern Tunneling Science and Technology, IS-Kyoto 2001. 525-528 (2001)

Anil Swarup，Shinichi Akutakawa：“反演分析在评估印度隧道稳定性中的应用”现代隧道科学技术国际研讨会论文集，IS-Kyoto 2001。 525-528 (2001)

Anil Swarup, Shinichi Akutagawa: "Application of back analysis in assessing the stability of an Indian tunnel"Proceedings of the International Symposium on Modern Tunneling Science and Technology, IS-Kyoto 2001. 1. 525-528 (2001)

Anil Swarup、Shinichi Akutakawa：“反演分析在评估印度隧道稳定性中的应用”现代隧道科学技术国际研讨会论文集，IS-Kyoto 2001. 1. 525-528 (2001)

Shinichi AKUTAGAWA, Tsutomu KITANI, Kensuke MATSUMOTO, Shunsuke MIZOGUCHI: "Numerical modeling of a nonlinear deformational behavior of a tunnel with shallow depth"Proceedings of the International Symposium on Modern Tunneling Science and Technology, IS-K

Shinichi AKUTAGAWA、Tsutomu KITANI、Kensuke MATSUMOTO、Shunsuke Mizoguchi：“浅埋隧道非线性变形行为的数值模拟”现代隧道科学与技术国际研讨会论文集，IS-K

Anil Swarup and Shinichi Akutagawa: "Application of back analysis in assessing the stability of an Indian tunnel"Proceedings of the International Symposium on Modern Tunneling Science and Technology, IS-Kyoto 2001, Oct.30-Nov.1. 525-528 (2001)

Anil Swarup 和 Shinichi Akutakawa：“应用反分析法评估印度隧道的稳定性”现代隧道科学与技术国际研讨会论文集，IS-Kyoto 2001，10 月 30 日至 11 月 1 日。

芥川真一: "土被りが浅いトンネルの非線形挙動解析に関する一考察"トンネル工学研究論文・報告集. 第9巻. (2000)

芥川真一：“浅土隧道非线性行为分析研究”，隧道工程研究论文和报告，第 9 卷（2000 年）。