Basic study on excavation mechanism for drysandy grounds

机译：旱田地基开挖机理基础研究

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This study aims to clarify the failure mechanism during three dimensionalrnexacavation.rnIt is possible to evaluate the excavation mechanism for a two dimensional excavation. However,rnwhen dealing with three dimensional excavation, considerable uncertainty exists in therntheoretical evaluation. The main cause of such uncertainty is due to a lack of information onrnmaterials and mechanisms in front of the cutting bit.rnIn this study model excavation tests using a flat simple cutting bit were performed on two typesrnof sandy soils; lunar soil (Regolith) simulant and Toyoura standard sand. The failurernprogression patterns in these tests were visualized using a X-ray TV imaging technique. As arnresult, we could demonstrate that the failure pattern was affected by the type of soil and thernrake angle of the cutting bit.

机译：本研究旨在阐明三维开挖过程中的破坏机理。可能对二维开挖的开挖机理进行评估。但是，在进行三维开挖时，理论评价存在很大的不确定性。造成这种不确定性的主要原因是由于缺乏有关切割头前方的材料和机理的信息。在本研究中，模型是在两种类型的砂质土壤上使用平整的简单切割头进行开挖试验的。月球土壤（Regolith）模拟物和Toyoura标准砂。使用X射线电视成像技术可视化了这些测试中的失效进展模式。结果表明，失效模式受土壤类型和切削头蛇行角的影响。

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来源
《14th International ISTVS conference》|2002年|1-8|共8页
会议地点 Vicksburgo MS(US)
作者
Ryoichi FUKAGAWA; Taizo KOBAYASHI; Ikkei WATANABE;
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作者单位

Department of Civil Engineering, Ritsumeikan University, Japanrnfukagawa@se.ritsumei.ac.jp;

Department of Civil Engineering, Ritsumeikan University, Japanrnsce40055@se.ritsumei.ac.jp;

Department of Civil Engineering, Ritsumeikan University, Japan;

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原文格式 PDF
正文语种 eng
中图分类车辆工程;
关键词
Excavation; Sand; Model test; X-ray TV radiography; Shear band; Failure pattern; Visualization; Three dimension;

机译：开挖；砂土；模型试验； X射线射线照相；剪切带；破坏模式；可视化；三维;

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Basic study on excavation mechanism for drysandy grounds

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