Basic Research on Slope Failure Mechanism of Shirasu in Southern Part of Kyushu Island

本研究是由Kitamura等人提出的建立降雨滑坡预报系统项目的一部分。在本学年(2003)开展了以下研究：(1)在仙台河大堤和鹿儿岛县前野滨大堤上设置了吸力、土壤温度和降雨量的野外测量装置，这两个地点的地表都覆盖了石杉。(2)利用室内土工试验、土槽试验、现场测量数据，应用Kitamura提出的数值模型和力学模型进行了数值模拟；(3)对预报系统中需要解决的问题进行了讨论和检验。最后，对本研究进行了总结。

This research occupies a part of the project to establish the prediction system for the slope failures due to rainfall that was proposed by Kitamura et al.In this educational year (2003) the following research was carried out, i.e., (1)the field measurement units for suction, temperature in soil and precipitation were set up at the levee of Sendai River and slope of Maenohama, Kagoshima Prefecture, where the surface ground of both sites was covered with Shirasu. (2)the numerical simulation was carried out by using the data obtained from the laboratory soil test, soil tank test, field measurement and applying the numerical & mechanical models proposed by Kitamura, (3)the issues to be solved in the prediction system were discussed and examined. Finally the report for this research was made up.