Estimation method for the distribution of the thickness of decomposed granite soil

2014 Fiscal Year Final Research Report

• Project/Area Number: 24510261
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Natural disaster science
• Research Institution: Kobe City College of Technology
• Principal Investigator: TORII Nobuyuki 神戸市立工業高等専門学校, その他部局等, 准教授 (70294246)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 斜面防災 / 表層崩壊 / 風化花崗岩（まさ土） / 表土層深分布

Outline of Final Research Achievements

In order to mitigate landslide disasters, it is important to evaluate the potential of slope failure events in space and time quantitatively. Rainfall-triggered slope failures are controlled by rainfall characteristics, slope topographic attributes and soil parameters. In these factors, the thickness of surface soil layer is a key parameter to control the result of evaluation. Therefore, it is important to consider the spatial variation of it in target area. In order to obtain the spatial variation of it, it is necessary to carry out field investigation such as portable penetration test (PPT). However, it is not realistic procedure to do it for the large area because it required tremendous amounts of money and time. In this paper, estimation method for the distribution of the thickness of decomposed granite soil is proposed as a method that takes the place of only measurement.

Free Research Field

斜面防災工学