鬼招手滑坡的特征及失稳机制-《山地学报》

文章信息/Info

Title:: The Basic Characteristics and Instability Mechanism of Guizhaoshou Landslides

Author(s):: XU Wei; NI Huayong; WANG Dewei; XU Ruge; Chengdu Institute of Geology and Mineral Resources，Chengdu 610081，China

Keywords:: highspeed landslides; landslides characteristics; destruction mode; destruction process

摘要:: 鬼招手滑坡位于"5·12"汶川地震极重灾区彭州市内,是地震4 a后暴雨诱发的高速滑坡。剖析了主滑体和堆积区Ⅰ、Ⅱ、Ⅲ的特征;分析了影响该边坡稳定性并诱发滑坡的6大因素,包括地层岩性、河流及泥石流冲刷掏蚀坡脚、暴雨及雨水下渗、断裂及"5.12"汶川地震、地貌、人类工程活动,其中持续暴雨是滑坡主要诱发因素;计算了主滑体抛射初速度为40.41 m/s,运动距离为137 m,定义了主滑体的破坏模式为滑移-抛射模式;总结了滑坡的破坏过程,分为坡体累积破坏、坡体启动、坡体运动、坡体堆积稳定4个阶段;对比分析了暴雨和地震诱发的高速滑坡的不同之处,对于地震灾区的防灾减灾工作具有一定参考价值。

Abstract:: Guizhaoshou landslide is located in quakehit areas——Pengzhou city of Sichuan，China. It is a rainstorminduced highspeed landslide after four years of Wenchuan earthquake，the feature of the main slide body and accumulation zone Ⅰ，Ⅱ，Ⅲ is analyzed detailly;six factors affecting the stability of the landslide and inducing landslides， including formation lithology，foot of the slope undercutted and washed by rivers and debris flow， heavy rains and rainwater infiltration and etc are analyzed，and sustained heavy rain is the major predisposing factors to landslide; the projectile initial velocity of the main slide body is 40.41 m/s，movement distance is 137 meters，landslide destruction mode is defined as the slipprojectile mode; the destruction process of Guizhaoshou landslide is summarized，which is divided into four stages including slope cumulative undermine stage，startup phase of the slope，the slope body movement stage，slope accumulate stable stage. The work fills the research on the rainstorminduced highspeed landslide，and the difference is compared from rainstorminduced and earthquakeinduced highspeed landslide. The work has a certain reference value for the disaster prevention and mitigation work in the areas threatened by geological disasters.

备注/Memo:: 收稿日期(Received date)：2013-01-28；改回日期(Accepted) : 2013-03-08。
基金项目（Foundation item）：科技部基础研究专项(2011FY110100)。[This research is supported by the Basic Research Project form Ministry of Science and Technology(2011FY110100).]
作者简介（Biography）：徐伟（1986-），男，山东淄博人，硕士，助理工程师；主要从事岩土体稳定性方向研究。[Xu Wei(1986-)，male，Zibo,Shandong Province，assistant engineer，majoring in the stability of the rock mass research.] E-mail:052054@163.com