EFFECT OF UNSATURATED SEEPAGE ON SLOPE STABILITY UNDER RAINFALL

2016 ◽  
Vol 7 (2) ◽  
pp. 131-139
Author(s):  
Ling Cao ◽  
Yejiao Wang ◽  
Yongfu Xu ◽  
Yunzhi Tan
Keyword(s):  
Slope Stability ◽  
Unsaturated Seepage

Safety Analysis of Static & Dynamic Method in Foundation Pit Considering Unsaturated Seepage

2013 ◽  
Vol 444-445 ◽  
pp. 946-950
Author(s):  
Yi Hong Zhou ◽  
Xiu Wen Li ◽  
Yun Feng Peng ◽  
Ting Zhang
Keyword(s):  
Slope Stability ◽  
Dynamic Analysis ◽  
Unsaturated Zone ◽  
Dynamic Method ◽  
Soil Consolidation ◽  
Main Study ◽  
Dynamic Boundary Conditions ◽  
Foundation Pit ◽  
Consolidation Settlement ◽  
Unsaturated Seepage

In order to study whether foundation pit is stable or not after excavation, the article adopted the Duncan E-B model to make static analysis for the excavation scheme which considering the soil consolidation settlement and to make dynamic analysis under the action of earthquake wave of EL Centro. To make a slope stability of foundation pit analysis by calculating static and dynamic boundary conditions which further coupled with the Newmark method. The main study is the foundation settlement and earth-rock dams, slope stability of foundation pit conditions that considering unsaturated zone seepage conditions of earth-rock dams after the excavation. The results indicated that: in the static & dynamic analysis, the distribution about settlement is reasonable, earth-rock dam and foundation pit slope is in the steady state, the excavation scheme is reasonable and feasible.

A Slope Stability Analysis Method Based on Unsaturated Seepage of Slope and its Comparison with Geo-Seep Software

2014 ◽  
Vol 540 ◽  
pp. 177-180 ◽  
Author(s):  
Dong Fang Tian
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Rigid Body ◽  
Unsaturated Soil ◽  
Limit Equilibrium ◽  
Fem Analysis ◽  
Slope Stability Analysis ◽  
Analysis Method ◽  
The Impact ◽  
Unsaturated Seepage

Based on the FEM analysis of unsaturated slope seepage and strength of unsaturated soil, and adopted the assumption of rigid body limit equilibrium to calculate safe coefficient of landslides, a new slope stability analysis method is promoted and the calculation program called USSP is composed and verified. The method could consider the impact of rainfall and water change to slope stability. Compared with GeoSlope package, it is more practical in rainfall or variation of ground water level condition.

Stability Analysis of High Filling Slope Affected by Precipitation Intensity

2012 ◽  
Vol 170-173 ◽  
pp. 1174-1178 ◽  
Author(s):  
Wen Tao Wang ◽  
Tao Song ◽  
Zeng Rong Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Slope Stability ◽  
Precipitation Intensity ◽  
Safety Coefficient ◽  
Stability Of Slope ◽  
Seepage Theory ◽  
The Stability ◽  
Unsaturated Seepage ◽  
Element Method

Aiming at researching on stability of slope affected by precipitation intensity, transient saturated-unsaturated seepage finite element method and slope stability finite element method are combined in this paper. Vadose field of slope is simulated in different precipitation intensity. Based on vadose field, the writers analyzed the stability of slope affected by precipitation intensity. The research results indicate that water is brought together in the interface first. Then the water level moves toward up and down respectively from the both sides of the interface. On the basis of saturated-unsaturated seepage theory, precipitation intensity has little effect on the slope stability in the first 6 hours after precipitation. After that, slope safety coefficient is relatively high when precipitation intensity is smaller, and vice versa.

Research of Slope Stability Analysis Considering Rainfall Infiltration

2012 ◽  
Vol 204-208 ◽  
pp. 487-491
Author(s):  
Jian Hua Liu ◽  
Zhi Min Chen ◽  
Wei He
Keyword(s):  
Slope Stability ◽  
Pore Water ◽  
Rock Slope ◽  
Rainfall Intensity ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Rainfall Infiltration ◽  
Safety Coefficient ◽  
Rainfall Duration ◽  
Unsaturated Seepage

Based on the saturated-unsaturated seepage theory and considering soil-hydraulic permeability coefficient characteristic curves of rock slope, the variation of suction in unsaturated region and transient saturated zone formation of rock slope were analyzed. Combined with engineering example, the strength reduction methods were adopted to analyzing the rock slope stability influence factors considering unsaturated seepage with different rainfall intensity and duration. The results show that the flow domain owing to rainfall infiltration mainly appears surface layer region of slope. The rainfall infiltration caused the groundwater level rise, the rising of transient pore water pressure and the fall of suction in unsaturated region caused the slope stability decrease. The rainfall intensity and duration have obvious influence on slope stability, and in the same rainfall duration condition, the safety coefficient of slope decreases with the accretion of rainfall intensity. With the rainfall duration increasing, the water in soil has more deep infiltration, the water content and pore water pressure was higher in the same high position, the decreasing of suction caused the safety coefficient of slope has more reduce.

A numerical framework for infinite slope stability analysis under transient unsaturated seepage conditions

2018 ◽  
Vol 243 ◽  
pp. 36-49 ◽  
Author(s):  
Khanh Pham ◽  
Dongku Kim ◽  
Hyun-Jun Choi ◽  
In-Mo Lee ◽  
Hangseok Choi
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slope Stability Analysis ◽  
Infinite Slope ◽  
Unsaturated Seepage

Research on the Slope Stability under the Condition of Water Level Fluctuation

2012 ◽  
Vol 256-259 ◽  
pp. 350-353
Author(s):  
Er Ping Zhao ◽  
Xiao Bing Jia
Keyword(s):  
Slope Stability ◽  
Water Level ◽  
Safety Factor ◽  
Seepage Flow ◽  
Intensive Study ◽  
Water Penetration ◽  
Seepage Theory ◽  
The Stability ◽  
Rock And Soil ◽  
Unsaturated Seepage

The rise and fall of water level has great effect on the slope stability. Based on the saturated-unsaturated seepage theory, the article has an intensive study of the seepage flow field and the change law of the stability safety factor of the slope stability under the condition of fluctuation of water level. The slope stability safety factor is changing in the process of water level’s rise and fall. with the carrying out of the impoundment, slope stability safety factor decreased. The water level rises in the water lever’s rising process. Due to the penetration of water penetration, the reduce of the shear strength of rock and soil, as a result, the slope stability safety factor reduced. as the water level increased gradually, slope stability safety factor increased. After two or three days later, the slope stability safety factor tends to a stable value.

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