Synthetic study on the hillside disaster and stability of woods-land resulting from Earthquakes

地震引发的山坡灾害与林地稳定性综合研究

• 批准号: 08306008
• 负责人: HAYASHI Setsuo
• 金额: $ 11.52万
• 依托单位: Mie University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08306008/
• 关键词: Earthquake disaster; Slope failure; Seismic ground motion; Amplification characteristics; Geological structure; Spectrum analysis; Debris flow; Disaster in old earthquakes; 地形特性; 古地震; 動的解析; 常時微動; 安定解析; 地形解析; 古地震被害

First many slope collapses in the Rokko Mountains triggered by the 1995 Hyogo-ken Nanbu Earthquake. The correspondence to the distribution of the slope failurcs was tried to set frequency characteristics from the seismograms. 1) It is presumed that the maximum acceleration was about 300-400 gal and its predominant frequency was 1 Hz or less. 2) The distribution of the aftershocks corresponds well with that of the slope collapses. Therefore, it is possible that the distribution of breaking energy on the fault plane is reflected that of the slopecollapses.Second the Kagoshima-ken Hokuseibu Earthquakes 1997 triggered many slope collapses in it's area. 1) The hillslopes underlain by granitic rocks are largely susceptible to slope collapses in comparison with those of sedimentary rocks. 2) The density of slope collapses, number of slope failures per 1km2, is 30.2 in the area underlain by granitic rocks and 7.6 in the area underlain by sedimentary rocks. The density of slope collapsesincreases with the height above sea level and the angle of slopes, In the area underlain by granitic rocks, however, many slope failures occurred at the lower height area and gentle slopes.Third the purpose of the study is to improve the understanding of morphological and geological features of debris flows caused by earthquakes. Data of 24 slope movements which occurred in Japan after 1900 were collected from number of related literatures and investigated.

首先，1995年兵库县南部地震引发了六甲山脉的许多斜坡崩塌。试图从地震记录中找出与边坡破坏分布相对应的频率特征。1)假定最大加速度约为300-400加仑，主频为1hz或更小。2)余震的分布与坡体崩塌的分布有较好的对应关系。因此，断裂能量在断裂面上的分布可能反映了坡面崩塌的分布。其次，1997年的鹿儿岛地震在该地区引发了许多斜坡坍塌。(1)与沉积岩下垫坡相比，花岗岩下垫坡更容易发生滑坡。2)坡面崩塌密度，即每1km2发生的坡面崩塌次数，花岗岩下垫区为30.2次，沉积岩下垫区为7.6次。随着海拔高度和坡度角度的增加，坡面坍塌的密度增加，而在花岗岩下垫区，坡面破坏多发生在低海拔和缓坡区。三是提高对地震泥石流形态和地质特征的认识。从大量相关文献中收集了1900年以后日本发生的24次边坡运动资料，并进行了研究。

项目成果

土屋智・下川・石川・地頭薗: "平成9年3月下旬から4月上旬に発生した鹿児島県西部地震と斜面崩壊(速報)" 砂防学会誌. 50(1). 86-88 (1997)

Satoshi Tsuchiya、Shimokawa、Ishikawa 和 Jitozono：“1997 年 3 月下旬至 4 月上旬发生的鹿儿岛西部地震和斜坡破坏（初步报告）”日本侵蚀控制学会杂志 50（1）。 1997）

Takashi JITOUSONO,Etsuro SHIMOKAWA,Makie MATSUMOTO and Yoshiyuki TERAMOTO: "Distribution and topograhical characteristics of slope failure caused by earth-quakes in northwestren part of Kagoshima in 1997" J.of the Jpn.Soc.of Erosion Control Engg.Vol.51, N

Takashi JITOUSONO、Etsuro SHIMOKAWA、Makie MATSUMOTO 和 Yoshiyuki TERAMOTO：“1997 年鹿儿岛西北部地震引起的边坡破坏的分布和地形特征” J.of the Jpn.Soc.of Erosion Control Engg.Vol.51，

Satoshi TSUCHIYA,Etsuro SHIMOKAWA,Yoshiharu ISHIKAWA and Takashi JITOUSONO: "Kagoshima-ken Hokuseibu Earthquakes in the end of March and early April and It's slope failure" J.of the Jpn.Soc.of Erosion Control Engg.Vol.50, No.1. 86-88 (1997)

土屋聪、下川悦郎、石川佳治、吉藤野贵志：“鹿儿岛县北西部地震发生在 3 月底和 4 月初，导致边坡失稳” J.of the Jpn.Soc.of Erosion Control Engg.Vol.50，No.

川邉洋・辻本文武・林拙郎: "兵庫県南部地震による六甲山地の崩壊分布" 砂防学会誌. 49・5. 12-19 (1997)

Hiroshi Kawabe、Fumitake Tsujimoto 和 Shuro Hayashi：“兵库县南部地震造成的六甲山脉破坏分布”《侵蚀控制学会杂志》49, 5. 12-19 (1997)。

地頭薗・下川・寺本: "1997年鹿児島県北西部地震による斜面崩壊" 砂防学会誌. 50(2). 82-86 (1997)

Jitozono、Shimokawa 和 Teramoto：“1997 年鹿儿岛西北部地震造成的斜坡破坏”，日本侵蚀控制学会杂志 50(2) (1997)。