Development of new tunneling method using X-ray CT

利用 X 射线 CT 开发新的隧道掘进方法

• 批准号: 17360228
• 负责人: OTANI Jun
• 金额: $ 9.98万
• 依托单位: Kumamoto University
• 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 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360228/
• 关键词: Tunnel; X-ray CT; Model test; Face failure; Auxiliary methods; Centrifuge model test; Image analysis; Direct share

In recent years, mountain tunneling method such as NATM (New Austrian Tunneling Method) has been used for tunnel construction even in the urban area. In Japan where land area is small, it is required that tunnel is constructed into unconsolidated ground or low overburden ground. When excavating a tunnel, tunnel face becomes very unstable due to stress release caused by excavation. It is a main issue to maintain the stability in tunnel face during construction. To create the condition for safe construction, it is necessary that tunnel face is reinforced by auxiliary method. However, failure zone due to tunneling is a behavior in three dimensions and the mechanism of face failure in three dimensions has not been well known yet.The objective of this research is to investigate tunnel face failure in three dimensions and to evaluate the mechanism of the auxiliary method. And finally, the new tunneling method with the auxiliary method is proposed. Here in this study, an Industrial X-ray CT was used in order to investigate the behavior in the soils. And the results of model test were checked with centrifuge modeling test for the purpose of in-situ stress level. Followings are the list of conclusions :1. A new testing system combining model test with X-ray CT was developed ;2. Effect image analysis method for getting proper X-ray image was developed ;3. The mechanism of tunnel face failure was well investigated using the test system developed in this research ;4. A series of centrifuge model tests were conducted for the purpose of checking the behavior of in-situ stress level ;5. One tunneling method was proposed based on the results of this research ;6. The effect of the auxiliary method was well investigated using a new test apparatus, direct shear test with CT scanning ;7. The effect cf the auxiliary method was also investigated with 1G model test and centrifuge test ;8. and finally, all the results obtained here in this research were summarized.

近年来，即使在城市地区，也已经将诸如新奥隧道法（新奥隧道法）的山岭隧道法用于隧道建设。在国土面积小的日本，要求隧道在松散地层或低覆盖层地层中施工。隧道开挖过程中，开挖引起的应力释放使掌子面变得非常不稳定。隧道掌子面的稳定性是施工过程中的主要问题。为了给安全施工创造条件，有必要对隧道掌子面进行辅助加固。然而，由于隧道开挖引起的破坏区是一个三维的行为，在三维的工作面破坏的机制还没有得到很好的了解，本研究的目的是在三维的隧道工作面破坏和评价的辅助方法的机制。最后提出了辅助法施工的新方法。在这项研究中，使用工业X射线CT来研究土壤中的行为。并利用离心模型试验对模型试验结果进行了验证，以确定地应力水平。本文的主要结论如下：1.开发了一套模型试验与X射线CT相结合的新型试验系统;提出了获得正确X线图像的效果图像分析方法;利用本研究开发的试验系统，对隧道掌子面破坏机理进行了研究。进行了一系列的离心模型试验，目的是检查在原地应力水平的行为;5。根据研究结果提出了一种隧道施工方法;6.采用一种新的试验装置--CT扫描直剪试验，对辅助方法的效果进行了研究。通过1G模型试验和离心试验研究了辅助方法的效果。最后，总结了本研究的成果。

项目成果

Evaluation of three-dimensional tunnel face failure mechanism using X-ray CT

利用 X 射线 CT 评估三维隧道掌子面破坏机制

• 发表时间: 2005
• 期刊: Proc.of 16th International Conference on Soil Mechanics and Goetechnical Engineering, Osaka
• 作者: J.Otani;D.Takano;H.Nagatani
• 通讯作者: H.Nagatani

X線CTを用いたゴムチップ-地盤間摩擦特性にオンする実験的研究

X射线CT橡胶片与土壤摩擦特性试验研究

• 发表时间: 2007
• 作者: J.Otani;D.Takano;H.Nagatani;島田里美;島田里美
• 通讯作者: 島田里美

X線CTを用いたゴムチップ-地盤間摩擦特性の解明

使用 X 射线 CT 阐明橡胶碎片与地面之间的摩擦特性

• 发表时间: 2007
• 期刊: 平成18年度土木学会西部支部研究発表会講演概要集
• 作者: 島田里美;高野大樹;大谷順;ハザリカ ヘマンタ;御手洗義夫
• 通讯作者: 御手洗義夫

X線CTを用いた新たなトンネル掘削技術の開発に関する研究

X射线CT隧道开挖新技术开发研究

• 发表时间: 2006
• 作者: J.Otani;D.Takano;H.Nagatani;島田里美;島田里美;福重庄太郎;倉吉祐輔
• 通讯作者: 倉吉祐輔

Evaluation of auxiliary method in tunnel construction using X-ray CT

X射线CT隧道施工辅助方法评价

• 发表时间: 2006
• 期刊: Proc. 6^<th> International Conference on Physical Modeling in Geotechnics Vol. 2
• 作者: D.Takano;H.Nagatani;J.Otani;T.Mukunoki
• 通讯作者: T.Mukunoki