摘要
介绍一种以钻孔倾斜仪深部变形监测为基础的评价堆积体滑坡完整性程度(破坏程度)的完整性指标Si(破坏性指标Sf)的方法,该方法可以在施工过程中根据孔口累计变形中滑带和滑坡体累计变形的各自变化关系计算出Si和Sf指标值,实时定量评价滑坡施工过程中滑带自下而上渐进破坏过程中稳定性的变化。破坏采用相对变形峰值标准,根据这种破坏标准可以看到,滑坡以滑带破坏为标志,滑带破坏则以滑带上盘破坏为标志。滑坡完整时对应Si=1,Sf=0;滑坡完全破坏时Si=0和Sf=1,不同破坏程度对应于[0,1]之间的某一值。工程实例表明,该方法不仅行之有效,而且非常方便。
The mechanical parameters and boundary conditions of landslide often change with time during the process of construction. Traditional quantitative assessing methods of landslide stability, such as limit equilibrium method, finite element method etc., are pretty difficult to simulate the dynamic mechanical behavior of landslide during the process of construction at the present time, so it cannot achieve the real-time quantitative assessment for landslide stability. A real-time quantitative assessing method of landslide stability in period of constriction is proposed. The new method based on deformation monitoring at depth of landslide may avoid the errors caused by the no determinacy of calculating models, mechanical parameters and boundary conditions etc. According to the respective relationship of the accumulated deformation of sliding surface and slip mass, by calculating the value of Si and Sf, the real-time quantitative assessing the stability of sliding surface from below to above in the progress of construction is conducted. The failure criterion is the peak value of relative deformation. According to the criterion, the symbol of landside instability is the failure of sliding zone which is marked by the destroy of sliding zone＇s hanging wall. When Si = 1 or Sf= 0, the landside is complete stability： when Si= 0 or Sf= 1, the landslide is eventual failure. Different destructive correspond a value between 0 and 1. Moreover, it shows that the method is easy to use and very efficient in application.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第10期2146-2152,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(40772193)
中央级公益科研院所基金资助项目(YWF200817)
关键词
边坡工程
堆积体滑坡
稳定性
实时定量评价
深部变形
监测
slope engineering
talus landslide
stability
real-time quantitative assessment： deformation of landslide in depth： monitoring
