活动断层分段性对地震滑坡的影响——以龙门山地区为例

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英文篇名：The Impact of Active Fault Segmentation on Seismic Landslides——a Case Study in Longmenshan Area 作者：吕澜清 英文作者：LV Lanqing;College of Earth Sciences, Chengdu University of Technology; 关键词：活动断层 ; 分段 ; 地震滑坡 ; 分布规律 英文关键词：active faults;;segmentation;;eismic landslides;;regularity of distribution 中文刊名：ACJS 英文刊名：Sichuan Nonferrous Metals 机构：成都理工大学地球科学学院; 出版日期：2019-06-28 出版单位：四川有色金属 年：2019 期：No.131 语种：中文; 页：ACJS201902009 页数：5 CN：02 ISSN：51-1455/TF 分类号：32-35+51

摘要

对活动断层所控制的地震滑坡的分布、形成机制等进行研究,有助于活动断层发育区的防灾减灾、工程选址等一系列人类工程活动的开展[1-2]。本文收集了诸多活动断裂带上的地震滑坡的实例,对比分析了附近滑坡的分布规律。结果表明:①处于映秀—北川断裂带错列、转折和末端等部位的5个锁固段,在地震发生时形成5个次级震源,产生巨大的地震场地加速度;②5个锁固段的陡峭地势为滑坡的发生埋下了隐患;③由于受到强烈构造活动作用的影响,区内发育多条次级断裂、褶皱,且岩层陡倾,岩体破碎,为滑坡的形成与发展提供了有利条件。
        The study on the distribution and formation mechanism of seismic landslides controlled by active faults is helpful to the development of a series of human engineering activities, such as disaster prevention and mitigation in active fault development areas and site selection of projects. This paper collects many examples of seismic landslides in active fault zones, compares and analyzes the distribution rules of nearby landslides, and discusses their formation mechanism. The results indicate that first when the earthquake occurred, the five locking sections in the YBF formed five secondary sources and resulted in huge acceleration of the earthquake site;second the steep terrain of the five locked sections had laid a hidden danger for the occurrence of landslides; third under the influence of strong tectonic activity, there were many secondary faults and folds in the area, and the rock stratum was steep and the rock mass was broken, which provided favorable conditions for the formation and development of the landslide.

引文

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