| Project/Area Number |
10650491
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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 | Nihon University |
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Principal Investigator |
TANO Hisataka Nihon-University, College of Engineering, Professor, 工学部, 教授 (00059700)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Hidehiko Nihon-University, College of Engineering, Lecturer, 工学部, 講師 (40175112)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Monitoring of rock slope / Image analysis / electro-optical-distance meter / natural rock slope / rockfall / 岩盤モニタリング / 岩盤崩落 / 超望遠画像解析 / レーザー距離計 / AE / 岩盤斜面 / 岩石 / モニタリング / 超望遠 |
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| Research Abstract |
This study reports on the results of an image analysis technique using ultra-telephotograph of a natural rock slope behavior. The photographs were took by a object lens of telescope and conveters as direct focus method. The distance from a camera(35 mm size) to the slope is about 430 meters far. The total focal length is 4500 millimeters. 45 rectangular plates (100×100 mm) were set on the surface of slope about one meter ineteval each other. In addition, An electro-optical-distance meter was used to check the results of displacement which were calculated by the image analysis. The natural rock slope showed as following behaviors ;
1) From winter season to spring one, joints of rock mass became to open a few millimeter,
2) From summer to winter, these joints inversely closes.
3) The results for theses behaviors of rock mass may correspond to the change of an underground water level in the backlands. The resulut of the displacement measured by an electro-optical-distance meter was in harmony with the behavior of the image analysis.
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