云南虎跳峡大塘子松散堆积体滑坡形成演化机制分析  

Analysis of Forming Evolvement Mechanism of Datangzi Loose Congeries landslide at Tiger-Leaping Gorge in Yunnan Province

作　　者：刘衡秋[1] 胡瑞林[2] 周宏磊[1] 朱志刚[1] 

机构地区：[1]北京市勘察设计研究院有限公司,北京100029 [2]中国科学院工程地质力学重点实验室,北京100029

出　　处：《三峡大学学报（自然科学版）》2010年第2期37-41,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家科技部"十一五"科技支撑项目(2006BAJ06B02);国家重点基础研究(973)项目(2002CB412702)

摘　　要：大塘子滑坡属于我国西南地区典型的第四纪崩坡积松散堆积体滑坡.从滑坡的发育特征调查和资料收集入手,研究了该滑坡的形成条件和演化机制,分析认为降雨和地震联合作用诱发滑坡的产生,且滑坡具有明显的周期性,其形成过程经历"碎石体堆积-自然休止状态-显著滑动"3个演化阶段,存在再次滑动的可能性,其周期长短主要受降雨强度和地震活动的影响.这一结果对于合理部署区域防灾减灾具有指导意义.Datangzi landslide is a typical Quaternary period loose congeries landslide in Southwest China.The detailed studies of the forming condition and evolvement mechanism of Datangzi landslide were carried out based on in-situ surveys and data collection.It is shown that the combination of prolonged rainfall and the Lijiang earthquake should be the main cause of the landslide;and the landslide may revive in some day.One development process includes three main phases such as avalanche accumulation,nature inactivity and gliding;and its cycle length is mainly affected by rainfall intensity and the impact of seismic activities.This study will provide a practical example for alleviating and preventing geo-hazards in Southwest China.

关 键 词：虎跳峡 松散堆积体滑坡 演化机制 周期性 

分 类 号：TU45[建筑科学—岩土工程] P694[建筑科学—土工工程]