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Construction of Slope Stability Analysis System which took Physiccal and Chemical Characteristic of the Landslide Clay

基于滑坡粘土理化特征的边坡稳定性分析系统的构建

基本信息

批准号：
09558052
负责人：
WATANABE Koji
金额：
$ 7.36万
依托单位：
FUKUI NATIONAL COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-09558052/
关键词：
slope stability analysis landslide snowmelt acidified soil 安全解析

项目摘要

This paper describes a new slope stability analysis system combining the physical and chemical characteristic.As the result of this study followings are found.(1) In order to enable the stability analysis in the case of no landslide hysteresis, sliding factors such as the fluctuation of weathering situation and pore water pressure of the soil were replaced with the physical or dynamic factors of the soil. By including the assumption above, a method for simulating the sliding behaviors which can situate similarly to actual sliding was proposed.(2) The estimation or testing methods to grasp the shearing characteristic of the soil layers were investigated. Then a method to estimate the shearing characteristic that is important for slope stability analysis was proposed.(3) By noticing pH of the groundwater, several investigations on the characteristics of acid soil was carried out. As the result, it was found that the relationship between pH of soil and strength/deformation characteristics has to be combined in slope stability analysis system as "a physical-chemical characteristic of landslide clay".(4) An examination of the generation of landslide clay layer by the seepage water (snowmelt water) was carried out.(5) An examination on the snowmelt water generation mechanism that is one of the main attributions of the landslide in the Hokuriku district was carried out. Because the temperature in winter season in Hokuriku district is comparatively high and the characteristics of snow and the weather condition are significantly different, therefore, the establishment of practical snowmelt conversion model considering these regional characteristics is important. From the conclusions mentioned above, finally, snowmelt conversion model that is applicable to the stability analysis in the Hokuriku district was proposed in this study.

本文提出了一种新的边坡稳定性分析体系，该体系结合了边坡的物理和化学特性。(1)为了使稳定性分析的情况下，没有滑坡滞后，滑动因素，如风化情况的波动和孔隙水压力的土壤被替换为物理或动力因素的土壤。在此基础上，提出了一种与实际滑动行为相似的滑动行为模拟方法。(2)探讨了掌握土层剪切特性的估算或试验方法。在此基础上，提出了一种对边坡稳定性分析具有重要意义的剪切特性的估算方法。(3)通过监测地下水pH值，对酸性土壤的特性进行了几次调查。结果表明，在边坡稳定性分析体系中，土壤pH值与强度变形特性的关系应作为“滑坡粘土的一种物理化学特性”来考虑。(4)对渗流水（融雪水）形成滑坡粘土层进行了研究。(5)对北陆地区滑坡的主要成因之一--融雪水的生成机制进行了研究。由于北陆地区冬季气温较高，积雪特征和气象条件差异较大，因此建立考虑这些区域特征的实用融雪转换模型具有重要意义。最后，根据上述结论，提出适用于北陆地区稳定性分析的融雪转换模式。