抄録
On March 11 in 2011, a very big earthquake occurred in Tohoku district in Japan. As a result, a large amount of tsunami sludge was generated and the radiation contamination due to the nuclear power plant disaster has also become a serious problem. Thus, it is necessary to decontaminate the radiation-contaminated waste and soil, and the radioactive pollutant will be stored at temporary storehouses. However, because covering with original soil or sheets deteriorate under rainfall or sunlight, it is preferable to further improve these ways. This study focused on Fiber-cement-stabilized soil method. This method is a new recycling method for high water content mud by using paper debris and cement. If the cover soil for radiation-contaminated soil can be produced from the tsunami sludge, we can make effective use of the tsunami sludge and store the radiation-contaminated soil securely. In order to investigate the durability for erosion and seepage behavior due to rainfall of the cover soil made of tsunami sludge, the outdoor test were carried out. As a result, it was cleared that the soil erosion loss almost did not occurred. Moreover, relationship between rainfall intensity and change tendency of pore water pressure was investigated.
