应用高精度GPS系统对四川丹巴哑喀则滑坡进行监测及稳定性分析  

HIGHLY PRECISE GPS MONITORING DEVICES FOR STABILITY ANALYSIS OF YAKAZE LANDSLIDE,DANBA,SICHUAN-BASED ON

作　　者：张清志[1] 郑万模[1] 巴仁基[1] 邓国仕[1] 李军[1] 

机构地区：[1]成都地质矿产研究所成都610082

出　　处：《工程地质学报》2013年第2期250-259,共10页Journal of Engineering Geology

基　　金：大渡河重点地区地质灾害监测预警示范(1212011014017)

摘　　要：位于四川省丹巴县梭坡乡的哑喀则滑坡是一大型松散土质边坡。鉴于该滑坡的严重变形和可能失稳造成严重灾害后果,所以选择进行高精度GPS监测。并且阐述了应用GPS监测滑坡时对监测点位选择、数据处理等方法。2007年至今的GPS监测结果显示主滑坡体上监测点平均位移速率达每年0.6～0.9m,表明该滑坡变形严重。结合地表裂缝和植被等地表特征,发现降雨量和坡脚大渡河的冲刷、浸泡对滑坡今后的发育趋势有着决定作用,建议加强监测做好预警预报工作。本文还特别指出在监测期内监测到的地震(2008年5月12日)和人类工程活动对滑坡造成的影响。Yakaze landslide is a large unconsolidated soil slope,located in Danba County,Sichuan.The landslide has serious deformation and its possible instability can cause serious disaster consequences.The highly precise GPS monitoring is selected for the landslide.This paper explains the application of GPS monitoring to the selection of landslide points,and data processing methods.Over a long series of GPS monitoring from 2007,it is concluded that this landslide has deformed seriously.The total shift rate of the points on the main body of landslide is 0.6 ～ 0.9m per year.On the other hand,site survey results show the surface fissures and sere vegetation at the same time, which Indicates that the landslide deformation is serious.The GPS monitoring result is combined with the surface features(i.e.,the surface fissure and the sere vegetation).It is found that rainfall and the river erosion and scour of the Daduhe river determine the activity of the landslide,the serious deformation of the landslide and the serious geologic hazards.Preventive measures are proposed as well.It is suggested to strengthen the monitoring and early warning forecast work.This paper also points out that during the monitoring period,the effects of Wenchuan Earthquake on May 12,2008 and human engineering activities were monitored on the impact of landslide.

关 键 词：GPS 哑喀则滑坡 监测 稳定性 

分 类 号：P642.22[天文地球—工程地质学]