2012 Fiscal Year Final Research Report
Seepage flow and seepage failure phenomena of soil for two fluids of different temperatures having different viscosities
| Project/Area Number |
22658073
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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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 |
TANAKA Tsutomu 神戸大学, 大学院・農学研究科, 教授 (20144602)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 地盤工学 / 異温度流体 / 気泡 / 二相流 / 粘性係数 / 浸透流特性 / 浸透破壊 |
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| Research Abstract |
The effects of the temperature of water on seepage flow and seepage failure phenomena were discussed. When seepage water with a higher temperature flows through cold saturated soil, it goes selectively though larger pores in the soil. The critical hydraulic gradient i_c with respect to the boiling of soil in a one-dimensional case is almost the same as soil having the same initial void ratio e_0 in spite of the flowing water temperature. When seepage water with a lower temperature flows through warm saturated soil, gases generates in soil. The case study on piping failure due to methane gas generated during the construction of a bridge pier was discussed. The occurrence of methane gas was resulted to be one of the main causes of piping failure in excavated bottom soil.
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