映秀—北川断裂带沿线崩滑体分布规律浅析
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摘要
"5.12"汶川大地震诱发的大规模次生地质灾害主要以崩滑体的形式表现。选取地震发生的映秀—北川断裂带沿线的崩滑体进行分析。根据地震影响的强弱、崩滑体分布的规模、大小及地形等因子,把映秀—北川断裂带沿线分为3个区域,分析崩滑体分布的微观规律。在震中,崩滑体的分布与地震释放能量大小正相关;在距震中稍远的地区,崩滑体的分布主要受岩石能干性及地形的控制。崩滑体的分布与地震影响强弱、岩性及地形相关的这一规律,对于防止类似次生地质灾害的发生、次生地质灾害的转化以及灾后重建等都有重要的参考价值。
5.12 Wenchuan earthquake induced large scale secondary geological disaster.The paper summarizes and analyzes the distribution law of the slump-mass in Yingxiu—Beichuan fault zone.In order to analyze the law of the slump-mass,we divided the fault into three groups according to the scale of the earthquake and the slump-mass and the terrain.Near the center of the earthquake,the slump-mass is related to the power of the earthquake.However,far from the earthquake,the slump-mass is related to the character of the rocks and the terrain.From the law we will prevent the slump-mass from threating people further and give recommendations for the project of reconstruction.
5.12 Wenchuan earthquake induced large scale secondary geological disaster.The paper summarizes and analyzes the distribution law of the slump-mass in Yingxiu—Beichuan fault zone.In order to analyze the law of the slump-mass,we divided the fault into three groups according to the scale of the earthquake and the slump-mass and the terrain.Near the center of the earthquake,the slump-mass is related to the power of the earthquake.However,far from the earthquake,the slump-mass is related to the character of the rocks and the terrain.From the law we will prevent the slump-mass from threating people further and give recommendations for the project of reconstruction.
引文
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[2]花亦木.2008年四川汶川8级地震的成因分析[EB/OL].[2008-05-25].http://hi.baidu.com/huayimu/blog/item/208d102e072ee1554fc2261c.html.
[3]刘凤民,张立海,刘海青,等.中国地震次生地质灾害危险性评价[J].地质力学学报,2006,12(6):127-131.
[4]李忠生.国内外地震滑坡灾害研究综述[J].灾害学,2003,18(12):65-70.
[5]李光,姚大全,张有林,等.汶川8.0级地震崩塌、滑坡的发育特点[J].防灾科技学院学报,2008,10(9):131-134.
[6]四川省地质矿产局.四川省区域地质志[M].北京:地质出版社,1991.
[7]李树德,任秀生,岳升阳,等.地震滑坡研究[J].水土保持研究,2001,8(6):24-25.
[8]吴文远,张志才,张炎周,等.汶川大地震次生地质灾害的主要特征及其预防[J].四川林勘设计,2008(9):7-10.
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