映秀—北川断裂带沿线崩滑体分布规律浅析

The distribution law of slump-mass in Yingxiu—Beichuan fault zone

"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.