权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on Concealed Active Fault in the Urban Area of Kobe

神户市区隐伏活断层研究

基本信息

批准号：
09640543
负责人：
MIYATA Takao
金额：
$ 2.18万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640543/
关键词：
Hyogoken-Nanbu Earthquake concealed active fault Goshukebashi Fault Ground-penetrating radar flexure strongly-damaged lines of lifelines Kobe urban area 地下レーダ探査反射強度地表変状

项目摘要

We investigated , the relationship between the co-seismic ground damages during the 1995 Hyogoken-Nanbu Earthquake (M_<JMA> 7.2) and the concealed active faults in the urban area of Kobe. The ground damages were estimated from 1307 inclined utility poles and 1,277 dislocated house inlets. We used the ground-penetrating radar (GPR) method with the 200 MHz and 100 MHz antennas for the detailed examination of the concealed active faults, which were found by seismic reflection surveys (Hyogo Prefecture Government, Committee on Earthquake Observation and Research in Kansai Area, etc.). The following results were obtained in the urban area of Kobe : (1) The strong ground damages have the characteristic pattern, distributing as spots and lines. The linear distribution is consistent with w southwestward extension of the well-known Goshukebashi fault in the Rokko Mountains. (2) the two zones of deformation in the Late Pleistocene to Holocene strata such as discontinuity and flexure were found in a subsurface zone of 10 m wide : One is located just over the concealed fault (Oji fault), and the other is at the Mikage flexure beneath the Ishiyagawa River Park, Kobe City. They appeared respectively to the southwestward extension from the Gosukebashi fault and the Mikage flexure. (3) The two deformation zones on the GPR profiles, are in harmony with the strongly-damaged lines of lifelines (utility poles, house inlets etc.) during the earthquake.

研究了1995年兵库县南部7.2级地震的同震地面破坏<JMA>与科比市区隐伏活动断层的关系。地面损坏估计有1307根倾斜的电线杆和1,277个错位的房屋入口。我们使用200 MHz和100 MHz天线的探地雷达（GPR）方法，对地震反射调查（兵库县政府、关西地区地震观测研究委员会等）发现的隐蔽活动断层进行了详细检查。在科比市区的研究结果表明：（1）强地面灾害具有一定的特征，呈点状和线状分布;这种线性分布与六甲山著名的五宿桥断层的西南向西延伸相一致。(2)晚更新世至全新世地层中的两个变形带，如不连续和弯曲，在10 m宽的地下带中被发现：一个位于隐蔽断层（王子断层）的正上方，另一个位于科比市石屋川河公园下方的三景弯曲处。它们分别出现在五助桥断层和三景挠曲的西南延伸部分。(3)探地雷达剖面上的两个变形带与生命线（电线杆、房屋进水口等）的强烈破坏线相协调。在地震期间。