四川5.12地震次生地质灾害的基本特征初析
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摘要
2008年5月12日14时28分,四川汶川发生里氏8.0级地震给灾区人民带来了巨大的灾难和损失,特别是山区地震次生地质灾害所带来的严重后果是人们始料未及的。本文主要报道了四川境内震中附近几个重灾山区的地震次生地质灾害的初步调查成果,简要论述了地震诱发的滑坡、崩塌、泥石流、地裂缝和沙土液化等次生地质灾害发育特征及其危害,提出了地震次生地质灾害某些发育规律方面一些认识和今后需要进一步研究的问题,对于灾后重建和高烈度区城镇规划具有一定的指导意义。
An earthquake of M_S8.0 hit Wenchuan,Sichuan,on May 12,2008 at 2:28 p.m.Beijing time,which brought serious disasters and great loss of property to the people of the earthquake-hit areas.Especially the serious consequence that the earthquake-induced geohazards in mountainous areas caused was unexpected.This paper mainly reports the primary investigation results of the earthquake-induced geohazards in some worst-hit mountainous areas near the epicenter in Sichuan,briefly describes the characteristics of development and harm of earthquake-induced geohazards such as landslide,rockfalls,debris flow,ground fissures and sand-soil liquation and presents some ideas about the development mechanisms of earthquake-induced geohazards and problems that need to be further studied.All these have certain significance for guiding the reconstruction of earthquake-hit areas and planning cities and towns in high-intensity areas.
An earthquake of M_S8.0 hit Wenchuan,Sichuan,on May 12,2008 at 2:28 p.m.Beijing time,which brought serious disasters and great loss of property to the people of the earthquake-hit areas.Especially the serious consequence that the earthquake-induced geohazards in mountainous areas caused was unexpected.This paper mainly reports the primary investigation results of the earthquake-induced geohazards in some worst-hit mountainous areas near the epicenter in Sichuan,briefly describes the characteristics of development and harm of earthquake-induced geohazards such as landslide,rockfalls,debris flow,ground fissures and sand-soil liquation and presents some ideas about the development mechanisms of earthquake-induced geohazards and problems that need to be further studied.All these have certain significance for guiding the reconstruction of earthquake-hit areas and planning cities and towns in high-intensity areas.
引文
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[2]周本刚,王裕明.中国西南地区地震滑坡的基本特征[J].西北地震学报,1994,16(1):95~103.
[3]邹谨敞,邵顺妹,蒋荣发.古浪地震滑坡的分布规律和构造意义[J].中国地震,1994,10(2):168~174.
[4]胡广韬.滑坡动力学[M].北京:地质出版社,1995.
[5]毛彦龙,胡广韬,赵法锁,等.地震动触发滑坡体滑动的机理[J].西安工程学院学报,1998,20(4):45~52.
[6]鲍叶静,高孟潭,姜慧.地震诱发滑坡的概率分析[J].岩石力学与工程学报,2005,24(1):66~70.
[7]李忠生.国内外地震滑坡灾害研究综述[J].灾害学,2003,18(4):64~70.
[8]张春山,张业成,吴满路.南北地震带南段水文地球化学特征及其与地震的关系[J].地质力学学报,2003,9(1):21~30.
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