基于褶皱构造背景的科牙滑坡形成机制分析  

Formation Mechanism Analysis based on Folded Structure for Keya Landslide

作　　者：曹曦[1] 巨广宏[1] 于国平[1] 

机构地区：[1]中国水电顾问集团公司西北勘测设计研究院,兰州市730050

出　　处：《勘察科学技术》2007年第3期17-19,24,共4页Site Investigation Science and Technology

摘　　要：查明滑坡形成的地质环境条件,分析滑坡发生的诱发因素和变形机制不仅是滑坡勘查的主要内容之一,而且对于滑坡稳定性评价、滑坡治理方案的提出等具有重要意义。在对白龙江流域某水电站勘查过程中发现,发育于该电站工程区的科牙滑坡形成机制与以往变形及破坏模式有所不同,即该滑坡属层状岩体褶皱成因,该文基于滑坡形成的背景构造及现场地质调查与勘测,分析了该滑坡形成演化机制。分析认为滑坡经历顺层蠕滑阶段、锁固段剪切阶段、滑面贯通破坏阶段、滑坡体稳定堆积等四个形成演化阶段。To find out geological condition for landslide formation, to analyze induced factors and deformation mechanism for landslide occurring is not only one of main matters of landslide , but also very important to evaluate the stability of landslide and to bring forward harnessing schemes. As to the deformation mechanism, Keya landslide located in a hydropower station damsite of Bailongjiang River basin is some different from former mode of deformation and failure of landslide, that is to say, the landslide roots in bedded fold. The paper analyzes the formation and evolvement mechanism based on background tectonics and field investigation. It＇s considered that Keya landslide has experienced four stages of bedding creepage, failure by shear, slide plane connecting and stable deposit of slide body.

关 键 词：滑坡 背景构造 褶皱 形成机制 演化阶段 变形破坏 

分 类 号：P642.22[天文地球—工程地质学]