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工程科学与技术:2013,45(4):76-83
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“4·20”芦山Ms7.0级地震次生山地灾害特征
(1.中国科学院 山地灾害与地表过程重点实验室;2.中国科学院 成都山地灾害与环境研究所)
Features of Secondary Mountain Hazards Triggered by the “4·20” Lushan Earthquake
(1.Key Lab. of Mountain Hazards and Surface Process,Chinese Academy of Sciences;2.Inst. of Mountain Hazards and Environment,Chinese Academy of Sciences)
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投稿时间:2013-05-12    修订日期:2013-05-27
中文摘要: 北京时间2013年4月20日08时02分,在四川省雅安市芦山县发生7.0级大地震。大地震同时诱发大量滑坡、崩塌等同震次生山地灾害。据现场应急调查,地震次生山地灾害主要以中小规模崩塌灾害为主,根据灾害发生的地层岩性,分别归纳了砾岩地层崩塌、砂泥岩地层崩塌、灰岩直立地层崩塌、堆积层滑坡及滑坡碎屑流5个主要类型。在对典型灾害体灾害特征、破坏模式和影响因素进行初步分析的基础上,提出区域构造背景为“4·20”芦山地震次生灾害的主控因素。芦山地震次生灾害具有群发性、滞后性特点,在后地震时期降雨激发条件下可能产生严重泥石流滑坡等山地灾害。因此,后地震时期在极震区特别是集中安置区,山地灾害监测预警工作十分重要。
Abstract:Ms7.0 giant earthquake took placed in Lushan County, Ya’an City at 8:02,April 20,2013, and according to field investigation, the most of secondary mountain disasters were collapses with small and median scale volume.Five principal types of secondary mountain disasters consisting of conglomerate collapses,sandstone collapses,carbonate stone collapses,landslides and long run-out landslide-avalanche were proposed and the characteristics,mechanism and influence factors were analyzed.The regional geological environment and structure were regarded as the primary elements through preliminary analysis, and the large amount of loosen materials were easy for occurring debris flows and landslides triggering by the storm and continuous rainfall, which will seriously threat the reconstruction and lives in the rainy season for decades,therefore the post-earthquake effect as well as the monitoring and pre-warning strategy should be carried out in meizoseismal area and especially in reconstruction settlements.
文章编号:201300447     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(41001007); 科技部国际合作资助项目(2013DFA21720);国家“十二五”科技支撑计划资助项目(2011BAK12B02);国家“973”计划资助项目 (2010CB731504);山地灾害重点实验室基金资助项目
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引用文本:
杨宗佶.“4·20”芦山Ms7.0级地震次生山地灾害特征[J].工程科学与技术,2013,45(4):76-83.
Yang Zongji.Features of Secondary Mountain Hazards Triggered by the “4·20” Lushan Earthquake[J].Advanced Engineering Sciences,2013,45(4):76-83.