Analysis of Dynamic Response of Landslide Stability to Reservoir Water Level Fluctuation Using Numerical Simulation

2012 ◽  
Vol 594-597 ◽  
pp. 407-414
Author(s):  
Wu Yi ◽  
Zhao Ping Meng ◽  
Guo Qing Li ◽  
Zhi Wei Jin
Keyword(s):  
Dynamic Response ◽  
Water Level ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Landslide Stability ◽  
Reservoir Drawdown ◽  
The Stability ◽  
Reservoir Water Level Fluctuation

Reservoir water level is one important factor influencing the stability of landslides. The dynamic response of landslide stability under reservoir water level function and its features are analyzed using theoretical and numerical methods. The results show that, in terms of reservoir water level fluctuation and landslide permeability, the seepage filed of landslide can be divided into four types: lag behind impoundment(X-Ⅰ), lag behind drawdown(T-Ⅰ), synchronization with impoundment(X-Ⅱ) and synchronization with drawdown (T-Ⅱ). Under lag behind drawdown, at a certain rate of reservoir drawdown, the stability drops with the permeability of landslide. Under lag behind impoundment, with the rise of water level, the lower the permeability of landslide is, the more stable the landslide is. Under synchronization with impoundment or drawdown, the stability of landslide drops with reservoir impoundment and rises with reservoir drawdown.

Study on Relationship between Deformation of Reservoir Water Level Fluctuation Change of the Shuping Landslide

2014 ◽  
Vol 556-562 ◽  
pp. 881-884
Author(s):  
Xue Qing Yan ◽  
Zong Hua Zhou ◽  
Peng Fei Tu
Keyword(s):  
Water Level ◽  
General Rule ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Water Level Variation ◽  
The Three Gorges ◽  
Landslide Deformation ◽  
Reservoir Water Level Fluctuation

The change of reservoir water level fluctuation has an important influence on the landslide deformation. In this paper, taking Zigui County of the Three Gorges Reservoir Shuping landslide as an example, based on the deformation and water level of reservoir deformation related analysis of landslide, summarizes the general rule by reservoir water level variation effect on deformation of landslide, which can provide some reference for the monitoring and analysis of landslide similar.

Bankside Stability Analysis under the Actions of Rainfall and Reservoir Water Level Fluctuation

2012 ◽  
Vol 610-613 ◽  
pp. 2658-2662
Author(s):  
Xu Tao Wang ◽  
Shu Jun Chen ◽  
Qian Feng
Keyword(s):  
Stability Analysis ◽  
Water Level ◽  
Water Level Fluctuation ◽  
Three Gorges Reservoir Area ◽  
Level Fluctuation ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Rainfall Condition ◽  
Landslide Mass ◽  
Reservoir Water Level Fluctuation

It has been accepted that the rainfall and the reservoir water level fluctuation plays an important role in the stability of the reservoir bankside. However, at present, there has not been suitable simplification method for the project application to calculate and appraise. Therefore, based on the Boussinesq’s differential equation of unsteady-seepage and boundary condition, and Laplace’s transform, the curvilinear equation of phreatic line in landslide mass is deduced under the rainfall and the reservoir water level fluctuation conditions, and a simplified formula which can be used in the project is gained by the polynomial fitting. Meanwhile, it holds together the transmission coefficient method to write programs about the bankside stability analysis in the paper. With the Er-Liban landslide of the three Gorges Reservoir area for the computation model, this paper use the program to analyze the change rule and stability of the phreatic line under the reservoir water level fluctuation and rainfall condition.

Study on the Relationship between Factor of Safety and Angle of Dip of Bedding Rock Slope when Exposed to Reservoir Water Level Fluctuation

2012 ◽  
Vol 446-449 ◽  
pp. 3894-3899
Author(s):  
Yao Li ◽  
Shu Ping Wang ◽  
Zhen Hua Zhang ◽  
Shao Jun Li
Keyword(s):  
Water Level ◽  
Water Level Fluctuation ◽  
Field Variation ◽  
Level Fluctuation ◽  
Rock Slopes ◽  
Seepage Field ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
The Relationship ◽  
Reservoir Water Level Fluctuation

The impoundment and running of Three Gorges Reservoir makes the water level fluctuate between 175m and 145m, and the water level fluctuation has been leading to the seepage field variation of bank slopes, which will bring out the stability change of bank slopes. In order to obtain the relationship between the angles of dip and factors of safety of bedding rock slopes which are generalized slope models from some bedding rock slopes failure in some reservoirs, the finite element method based on Darcy seepage theory was taken to simulate the seepage field variation of this type of bedding rock slopes when exposed to water level fluctuation, then the underground water tables of the bedding rock slopes with different angles of dip were obtained, finally the factors of safety of bedding rock slopes when water level rose and fell at speed of 0.2m/d were calculated by limit equilibrium method. Through the regulation analysis of factors of safety with the increase of angles of dip of bedding rock slopes when exposed to reservoir water level fluctuation, the relationship between factors of safety and angles of dip of bedding rock slopes was obtained.

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