| Budget Amount *help |
¥3,610,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,400,000 (Direct Cost: ¥1,400,000)
|
|---|
| 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.
|
