2003 Fiscal Year Final Research Report Summary
Stability evaluation system on tunnel face and its field applicability
| Project/Area Number |
14550496
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Yamaguchi University |
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Principal Investigator |
SHINJI Masato Yamaguchi University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40335766)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMIZU Norikazu Yamaguchi University, Faculty of engineering, Processor, 工学部, 教授 (70150357)
NAKAGAWA Koji Yamaguchi University, Faculty of engineering, Processor, 工学部, 教授 (40026216)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Tunnel / Field measurements / Rock mass / photogrammetry / Tunnel face stability |
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| Research Abstract |
This study carried out accuracy verification of the three-dimensional photogrammetry technology as basic technology of stability evaluation system of tunnel face and its field applicability. The photogrammetry is the technology which automatically measures the three-dimensional positional relation. That is to say, the subject is photographed from the position which differs, and the photograph of plural pieces is viewed and is processed by the computer stereoscopically. Using the photogrammetry, the measurement system aimed in this study conveniently measures deformation behavior of whole working face. In the photogrammetry, the measurement control point is required. However, it is dangerous to establish measurement control point on the tunnel face. Then, the work in the working face was avoided, and it was utilized as a measuring point on the conventional measurement cross section away from face plane, and in the face plane, semi-point should be newly established
Next, The tunnel face behavior was reproduced using expanded polystyrene edition of the 9mm thickness, and the displacement accuracy of the photogrammetry was verified. As a result of the verification, following conclusions became clear
1) The location in control point and semi-point strongly affects the accuracy of the photogrammetry. It is effective that it is placed in order to surround the range by the measurement for the accuracy improvement
2) That working face deformation behavior of the 1mm accuracy could be measured in the photogrammetry clarified
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Research Products
(10 results)
