四川阿坝州色斯满泥石流沟判定及防治工程建议  

Suggestions on identification of Sesiman debris flow and preventive measures of Aba area of Sichuan Province

作　　者：沈波[1] 马东涛[2] 王亚群 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142 [2]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [3]中水顾问集团北京勘测设计研究院,北京100024

出　　处：《人民长江》2013年第7期44-46,99,共4页Yangtze River

基　　金：地质灾害防治与地质环境保护国家重点实验室开放基金项目(GZ2007-15)

摘　　要：历史上色斯满沟虽暴发过大规模泥石流,但近期稳定。拟建安宁河水电站坝址位于沟口下游约300 m处,正确判定该沟的性质以及今后的活动情况,对拟建水电站的选址至关重要。在对该沟沟口堆积扇、沟道泥痕、台地等现场详细调查的基础上,分析判定该沟曾经暴发过泥石流,进而对该沟所具备的物源条件,尤其是南北两条支沟的冰碛物数量和稳定性作出了详细评价,判断北支沟的冰碛物为该泥石流沟的主要物源。对该沟泥石流的特征和发生机理进行了分析,并提出了防治措施和建议。In history, large scale of debris flow occurred in Sesiman gully, however, it is relatively stable recently. Sesiman gully is located 300 meters upstream of the proposed An＇ning Hydropower Station. Correct identification of its characters and fu- ture situation is vital to the dam site selection of the proposed hydropower station. On the basis of detailed investigation of the al- luvial fan, mud trace and tableland in the gully, it is analyzed that the debris flow occurred in the gully before. Furthermore, the material sources conditions of the gully, especially the quantity and stability of glacial tills in the south and north branch gullies are evaluated in detail. The result showed that the glacial till from the north branch is the main material sources of the gully. Be- sides, the characteristics and mechanism of the debris flow are summarized, the preventive measures and suggestions are put for- ward as well.

关 键 词：冰碛物 格栅坝 潜坝 色斯满泥石流沟 安宁水电站 

分 类 号：P642.23[天文地球—工程地质学]