5·12汶川地震诱发都江堰龙池镇干沟泥石流可能性地质分析  

Possibility Geological Analysis of Gangou Debris Flow in Longchi Town in Dujiangyan Induced by the Earthquake of May 12 in Wenchuan

作　　者：沈军辉[1] 朱容辰[1] 刘维国[1] 任洋[1] 章志峰[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《山地学报》2008年第5期513-517,共5页Mountain Research

基　　金：陕西省重点学科(自然地理学)建设项目~~

摘　　要：岷江一级支流龙溪河右岸次级支流干沟,位于四川省都江堰市龙池镇,沟口为5·12汶川地震后都江堰龙池镇主要过渡安置房集中居住区。根据流域地质地貌条件,5·12地震诱发崩塌、滑坡山地地质灾害特征及泥石流发育历史等方面,分析预测了干沟震后暴发大规模泥石流的可能性及其危害性。研究表明,干沟为一多期次泥石流沟,其中两次在沟口形成了规模巨大的泥石流堆积扇;流域内5·12地震滑坡、崩塌极为发育,固体碎屑物质极为丰富,在持续强暴雨下有发生大规模泥石流的极大可能,将对沟口过渡安置房集中居住区带来严重危害。据此,提出了停建干沟沟口过渡安置房等建议。Gangou is the right-bank secondary branch of Longxi river which is first grade tributary flowing of Minjiang, located in Longchi town in Dujiangyan in Sichuan. The toe of Gangou is the area of under-construction transition settlement building of Longchi town in Dujiangyan after the earthquake of May 12. This paper according to the regional geological and landform, the characteristics of failing and landslide hazards induced by the earthquake of May 12 and the growth history of debris flow, analysis and forecast the possibility and harmfulness of debris flow. The result show, Gangou is multi-stages debris flow gully, twice formed huge-scale debris fans in the toe of the gully; Landslide and collapse induced by the earthquake of May 12 development very much in basin interior of Gangou, solid and fragmentary material are very rich, there have maximum possibility of happening large-scale debris flow in continuous heavy rainfall, it will endanger the transition settlement building in the toe of gully. So, we propose stop construction the transition.

关 键 词：汶川地震 都江堰市 干沟泥石流 地质分析 过渡安置房 

分 类 号：Q642.23[生物学—生物物理学]