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Research of the estimate of the slope failure of rainfall in the damaged ground by the Tokachi and Hyogoken-Nanbu Earthquakes by using ground penetrating radar and field emission type electron microscope

利用探地雷达和场发射型电子显微镜估算十胜地震和兵库县南部地震受损地面降雨崩塌的研究

基本信息

批准号：
16340154
负责人：
TAINOSHO Yoshiaki
金额：
$ 10.43万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

The 1995 Hyogo-ken Nanbu and Tokachi Earthquakes had caused serious damages on the hilly land. Serious damaged grounds were observed on the margin of the hilly lands. The reason for this serious damaged modern buildings is soft ground and landfill area. We applied the ground penetrating radar (GPR) method for the landslide in the earthquake. Many ground penetrating radar lines along the damaged area were examined by using the SIR-3000 (GSSI) with 100MHz antenna. The landslide structures under the ground were found on the GPR profiles as well as ground surface of the tension cracks. The dip of the structures on the GPR profiles is not gentle angle. The weakly reflected images show the water-bearing soft ground. This weakly image is located in the landslide area. Thus, ground penetrating radar method is useful for the damaged ground analyses.The steep slopes are widely distributed in Mount Rokko. These steep slopes were composed of deep weathered granitic rocks. Altered minerals in the steep slopes were identified by X-ray diffraction to estimate of weathering products. Chemical composition of the many rocks in the deep slopes was also analyzed by using EDXRF to check the grade of weathering. In the collapre steep slopes, readily leachable is clear. The leaching tendency coincides with the grade of the weathering. It is possible that the examination by the chemical composition quantitatively shows the progresses of the weathering of the steep slopes. Many slope failures have weathered minerals such as kaolinite by using X-ray diffraction. From these results, it seems to generate a collapse by the heavy rainfa

1995年兵库县南部地震和十胜地震对山地造成了严重破坏。在丘陵地带的边缘观察到严重受损的地面。造成这一严重破坏的现代建筑物的原因是软土地基和垃圾填埋场。我们应用探地雷达（GPR）方法对地震中的滑坡进行了探测。利用SIR-3000（GSSI）100 MHz天线探测了沿受损区域沿着的多条探地雷达线。在探地雷达剖面和地表张拉裂缝上发现了滑坡结构。构造在探地雷达剖面上的倾角并不平缓。弱反射图像显示含水软土地基。该弱图像位于滑坡区。因此，地质雷达法是一种有效的分析方法。这些陡峭的斜坡由深风化的花岗岩组成。利用X射线衍射法对陡坡蚀变矿物进行了鉴定，以评价风化产物。利用EDXRF分析了深边坡中许多岩石的化学成分，以检查风化程度。在陡峭的山坡上，很容易沥滤出来。淋溶倾向与风化程度相一致。通过化学成分的检测，可以定量地反映陡坡的风化进程。X射线衍射分析表明，许多边坡破坏中含有高岭石等风化矿物。从这些结果来看，它似乎产生了一个崩溃的沉重负担，