2004 Fiscal Year Final Research Report Summary
Research of the behavior for buried flexible outlet conduit under the earth dam
| Project/Area Number |
14360143
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Kobe University |
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Principal Investigator |
KAWABATA Toshinori Kobe University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (20335425)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Kazunori Kobe University, Faculty of Agriculture, Professor, 農学部, 教授 (80111946)
TANAKA Tsutomu Kobe University, Faculty of Agriculture, Professor, 農学部, 教授 (20144602)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Geotechnical Engineering / Underground Structure / Model Tests / Earth Pressure / Settlement / Irrigation Pond / Numerical Analysis |
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| Research Abstract |
The behavior of buried flexible pipe is influenced to a considerable extent by the properties of the backfill materials. Recently, geosynthetics are commonly used in retaining wall for reinforcement. And flexible pipe is used for drainage in such embankment.
However, the behavior of buried flexible pipe in the retaining wall reinforced by geosynthetics is not clear.
Experiments using a middle-sized steel test pit were carried out to examine the behavior of a flexible pipe buried in a reinforced embankment with settlement. A bi-axial load cell was developed in order to accurately measure the load acting on the buried pipe, and a model pipe, which was equipped with 20 such load cells was made.
The result showed that with settlement of the pipe, the arching action of the backfill progress, and the vertical load that acts on the pipe greatly decreases.
In addition, it was found that when backfill with sand and geogrid was used, the vertical load act on the pipe was distributed by the geogrid, hence decreasing by approximately 25% the overburden load.
In the future, it is necessary to examine the effects of the installed position of the geogrid and number of layers of the geogrid.
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[Journal Article] Lateral Loading Tests for Buried Pipe with Geosynthetics2004
Author(s)
Kawabata, T., Uchida, K., Ling, H.I., Nakase, H., Sawada, Y., Hirai, T., Saito, K.
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Journal Title
Proceedings of Geo-Trans 2004 (ASCE) Vol.1
Pages: 609-616
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Experiments on Buried Flexible Pipe Using Backfill of Cover with Geosynthetics2003
Author(s)
Kawabata, T., Uchida, K., Hirai, T., Mohri, Y., Ling H.I., Koyama, N.
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Journal Title
New Pipeline Technologies, Security, and Safety (ASCE) Vol.2
Pages: 1271-1278
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] D.E.M. Analyses on Behavior of Shallowly Buried Pipe Subject to Traffic Loads2003
Author(s)
Kawabata, T., Uchida, K, Ariyoshi, M., Nakase, H.Mohri, Y., Ling, H.I
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Journal Title
New Pipeline Technologies, Security, and Safety (ASCE) Vol.2
Pages: 1218-1227
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Distribution of Traffic Loads for Shallowly Buried Pipe by D.E.M. Analyses
Author(s)
Kawabata, T., Ariyoshi, M., Uchida, K., Ling, H.I., Nakase, H., Sawada, Y., Mohri, Y.
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Journal Title
Proceedings of Pipeline 2004 (ASCE SanDiego, USA) CD Dir 9B
Pages: 1-10
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Lateral Loading Experiments on Thrust Protecting Method for Buried Bend with Geogrid
Author(s)
Kawabata, T., Uchida, K., Sawada, Y.Hirai, T., Saito, K.
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Journal Title
Proceedings of Geofrontiers 2005 (ASCE, Austin, TX, USA) Vol.GSP140
Pages: 1-8
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Uplift Mechanism of Underground Structures in Dry Sand Subjected to Cyclic Simple Shear by DEM
Author(s)
Kawabata, T., Uchida, K., Ooishi, J., Nakase, H.
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Journal Title
Proceedings of 15th International Offshore and Polar Engineering Conference, ISOPE2005, Seoul, Korea (now printing)
Description
「研究成果報告書概要(欧文)」より
