RESEARCH OF THE DYNAMIC AND THE RAIN CHARACTERISTIC OF THE DECOMPOSED GRANITE SOIL SLOPE CALAMITY BY THE LOCAL SEVERE RAIN OF JUNE, 1999 HIROSHIMA PREFECTURE
| Project/Area Number |
12650503
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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 | KURE NATIONAL COLLEGE, OF TECHNOLOGY |
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Principal Investigator |
KOBORI Shigehisa KURE NATIONAL COLLEGE OF TECHNOLOGY DEPARTMENT OF CIVIL ENVIRONMENTAL ENGINEERING., 環境都市工学科, 教授 (10043829)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | slope failure / rain seepage / pore pressure / triaxial test / saturated soil / decomposed granite soil / rain calamity / 崩壊分布 / サクション / 原位置試験 / アンケート調査 / 崩壊歴 |
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| Research Abstract |
1) In experimental research of the slope collapse mechanism by rain osmosis, it experimented by changing the existence of thick layer, density and a groundwater style and rain intensity using an experiment slope. It turns out that the ground with a sufficient particle size cannot collapse easily as a result, and that only groundwater has the danger of collapse.
2) The residential area which will have a slope in Kure in research of "the questionnaire of cliff" about a heavy rain calamity in June, 1999 performed, analyzed and examined the questionnaire of a cliff.
3) Various experiments were conducted on the same model slope as the indoor rain osmosis experiment used in the first year using the decomposed granite soil and river sand as a result, after 25 minutes, the decomposed granite soil generated pore pressure after 30 minutes and river sand reached after about 5 minutes and 10 minutes respectively at the maximum pore pressure quick.
4) The dynamic characteristic of the decomposed granite soil performed the saturation 3 axis compression examination for "3-6 an-disturbed on consolidation drainage condition. The correlation of density and intensity was obtained as a result.
5) Comparison examination of the rain calamity and earthquake calamity in the decomposed granite soil collapse slope was carried out. As a result, the rain calamity collapsed focusing on the foot port of the circumference of a steep slope, the earthquake calamity was generated in the direction of east and west of a city area at the cliff of stone wall structure again, and many collapse was seen also in the city area
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Report
(3 results)
Research Products
(16 results)
