|
Abstract Due to the buoyancy produced by reservoir level rising and the dynamic stress produced by the descent of the water level，the intrinsic water-slope interaction circumstance and condition will be changed，which may results in the instability of the slope. Combined with the site monitoring results of the landslide #1 in Majiagou in the Three Gorges reservoir area and the water level fluctuation data，the true 3D model was established by using numerical simulation method. With finite difference program software and the Fish language programming considering the static water pressure effect to slope surface due to the rising of water level and the dynamic seepage pressure produced by the drawdown of reservoir water level，the displacement and the stress field of landslide during the evolutionary process of the changing of the water level were analyzed. Under the fluctuation of the water level，the seepage-stress fields，the displacement and mechanical characteristics of landslide in reservior area with the anti-slide pile reinforced were analyzed. In addition，the control effect of landslide-anti-slide pile system was discussed. The results indicate that：the combination of soil arching effect forced by the anti-slide pile and soil formation and the resistance slip effect of anti-slide pile，the landslide prevention and control effect are obvious. Compared to the hydrostatic pressure，the weakened effect of the dynamic water pressure produced by the reservoir water level drawdown on the landslide-anti-slide pile system is larger. The numerical simulation method may be applicable for 3D analysis of interaction of landslide and anti-slide pile system during sudden change of reservoir water level.
|
|
Received: 19 November 2012
|
|
|
|
2013, Vol. 32 
