| 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)
|
|---|
| 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.
|
