摘要
为探究地震触发崩塌滑坡的分布规律,基于汶川地震22 302个、芦山地震1 608个以及尼泊尔地震919个触发的崩塌滑坡数据,利用GIS技术对其分布与断层距、岩性、坡位和坡形之间的关系进行了统计分析.结果表明:3次地震触发的崩塌滑坡均具有硬岩区比软岩区、复杂坡形(凸、凹形坡)比简单平面坡更严重的规律和"上下盘效应";在一般情况下,地震触发的崩塌滑坡分布具有"断裂带效应",但在烈度异常情况下不存在"断裂带效应";仅当烈度不小于Ⅸ度时,崩塌滑坡才凸显出在高坡位更严重的特点.
In order to study the distribution laws of landslides induced by regularities of landslides were investigated statistically based on the data earthquakes, the distribution of 22 302 landslides induced by the Wenchuan earthquake, 1 608 landslides induced by the Lushan earthquake, and 919 landslides induced by the Nepal earthquake using GIS techniques, and the relationships of the landslides with distance from coseismic fault, lithology, slope position and slope shape were discussed. The research results show that the landslides induced by the three earthquakes were more serious in hard rock zones than in soft rock zones and in complex slope shape zones than in simple slope shape zones. Moreover, the distributions of these landslides shown a ＂ hanging wall and footwall effect＂. The distributions of the landslides shown a ＂fault effect＂ in ordinary circumstances, otherwise, the＂ fault effect＂ did not exist in intensity anomaly. The landslides had a characteristic, i. e. , they were more serious in high slope position only when seismic intensity was not less than intensity IX.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2016年第1期71-77,共7页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(41172321)
中国铁路总公司科技研究开发计划课题(2014G004-A-6
2015G002-N-2)
关键词
汶川地震
芦山地震
尼泊尔地震
崩塌滑坡
分布规律
Wenchuan earthquake
Lushan earthquake
Nepal earthquake
landslide
distribution law
