Study on bending creep mechanism and time-dependent deformation characteristics of landslide with double sliding planes and rock-layer reverse Article

cited authors

  • Wang, Y; Ren, W; Wang, C; Chen, H; Shen, S; Zhao, C

fiu authors

abstract

  • To study the deformation and destruction mechanism of landslide with double sliding planes and rock- layer reverse, using Hanjiaya landslide in Xiangfan-Shiyan expressway as example, bending creep condition and mechanism of reverse rock-layer are expounded deeply;the time-dependent deformation equations concerning the bending creep characteristics of rock layer are established by combining with nonlinear creep model and creep buckling equation of reverse rock layers under the condition of plane strain. It brings forward a clue to forecast the stability of the landslide according to the deformation rate of bending creep of reverse rock-layers and discusses creep buckling instability mechanism characteristic under different load levels. The qualitative comparison between in-situ monitoring and analytical results indicates that in the rain season, when the loading level of landslide foreside qi(0)> qi(t) > qi(+∞), the gradual accumulation of rock-layer reverse deformation, and deferred instability failure of the landslide occur;in the dry season, when the loading level is qi(+∞) , the landslide is in temporary stable condition. In conclusion, it is reasonable and feasible to analyze and evaluate the landslide with the model proposed.

publication date

  • September 1, 2008

start page

  • 3712

end page

  • 3718

volume

  • 27

issue

  • SUPPL. 2