| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Outline of Final Research Achievements |
Field investigation and laboratory tests were conducted to study the mechanism of formation/expansion of subsurface cavities and water pathways in the ground.
It was possible to clarify the cause of sinkholes occured in the real cases, such as multiple sinkholes in Pokhara, Napal and a large scale sinkhole in Miyakonojo, Miyazaki. But it was not possible to detect the water pathway or underground cavities at more than two meter deep, with non-destructive manner. From laboratory tests, stiffness and strength reduction of soil due to suffusion could be quatitatively evaluated to some extent.
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