极震区岩体地震动力破坏研究体系框架初探

Preliminary Research on Systematic Frame of Rock Mass Seismic Dynamical Failure in Meizoseismal Areas

极震区岩体地震动力破坏是造成极震区严重的地震地质灾害和次生灾害的根本原因。汶川地震中因此而导致的交通工程结构损坏、中断和次生崩滑流、堰塞湖等地质灾害,不仅加剧了灾害损失,并给震后的灾区恢复重建和对外交通遗留了较多的安全隐患。从岩体稳定、山体稳定和区域稳定的层次,分别对有关极震区岩体地震动力破坏的主要研究成果进行了系统总结,分析了其现状和存在的问题。结合对研究思路和方法论的讨论,构建了极震区岩体地震动力破坏研究的体系框架,提出了极震区岩体地震动力破坏研究的主要内容和方向,以期明晰概念,理清思路,为有关问题的深入研究提供有益的参考。

Rock mass seismic failure is the radical cause bringing on serious seismic geological hazards and secondary disasters in meizoseismal area. The transportation structures damaged or interrupted by earthquakes and secondary hazards such as landslides, rock avalanche, debris flow and barrier lakes, etc. resulted from rock mass seismic failure not only aggravated the disaster losses, but also left much hidden safety problems to the recovery and reconstruction and outward transportation facilities of earthquake areas. Some research achievements on rock mass seismic failure were thoroughly summarized from the different perspectives on levels of rock mass stability, mountain mass stability and regional stability respectively. The state of the art and concerned problems were analyzed. The systematic frame of rock mass seismic dynamical failure was established. The main problems and directions were brought forward with the combination of the discussions on present research ideas and methods in order to clarify the concept and systematize the ideas to provide helpful reference to further researches.