Study on the loosening mechanism of the ground due to aging of sewerage pipes and its countermeasure methods
| Project/Area Number |
20360213
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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 |
Geotechnical engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
OTANI Jun Kumamoto University, 大学院・自然科学研究科, 教授 (30203821)
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| Co-Investigator(Kenkyū-buntansha) |
OBARA Yuzo 熊本大学, 大学院・自然科学研究科, 教授 (50135315)
MUKUNOKI Toshifumi 熊本大学, 大学院・自然科学研究科, 准教授 (30423651)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2008: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
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| Keywords | 地盤工学 / X線CT / 下水管渠 / 地盤防災 / 対策工 |
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| Research Abstract |
It has been reported that the roadway surface locally subsides due to settlement in a base course. In most cases, a sewerage pipe exists underneath the subsidence part. In order to understand significant factor on local subsidence at road surface, model test was performed to generate a cavity in the model ground. Water was supplied into each model ground by Toyoura sand from the defect part with a same hydraulic head and soil was drained from the same defect part, which is created on the bottom of model ground. An industrial X-ray computed tomography (CT) scanner was used to scan the condition in the model ground at each step of water supply-drainage cycles ; the cavity generation in the model ground was observed 3-dimensionally. The analysis of CT image evaluated the range of loosening area, visually and quantitatively.
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Report
(4 results)
Research Products
(32 results)
