Real-Time Monitor Method of Soil Slope Stability in Seasonal Frozen Area

2013 ◽  
Vol 303-306 ◽  
pp. 777-781
Author(s):  
Ping Jiang ◽  
Meng Su Zhang
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Real Time ◽  
Evaluation System ◽  
Landslide Hazard ◽  
Soil Slope ◽  
Freezing And Thawing ◽  
The Neural Network ◽  
Neural Network Algorithm ◽  
Freezing And Thawing Cycles

Soil slope in seasonal frozen area subject to rainfall or freezing and thawing cycles, the shear strength of soil damage and lead to landslide hazard. In order to predict the landslide hazard through monitoring the soil slope stability real-time, the soil slope stability evaluation system is established. The Neural Network Algorithm can simulate elastic-plastic finite element method well, and using Genetic Algorithm to search cohesion(c) and internal friction angel(φ) which meet the accuracy requirements. And the intelligent parameter inversion model of soil shear strength (c, φ) based on displacement is established. So, the slope stability can be evaluated real –time based on displacement monitor. Application of this method in actual project shows that this method is accurate and effective.

Slope Stability Analysis under the Condition of Seepage

2012 ◽  
Vol 204-208 ◽  
pp. 241-245
Author(s):  
Yang Jin
Keyword(s):  
Finite Element Method ◽  
Shear Strength ◽  
Slope Stability ◽  
Negative Impact ◽  
Strength Reduction ◽  
Soil Slope ◽  
Failure State ◽  
Calculation Results ◽  
The Stability ◽  
Shear Strength Reduction

The stability of soil slope under seepage is calculated and analyzed by using finite element method based on the technique of shear strength reduction. When the condition of seepage or not is considered respectively, the critical failure state of slopes and corresponding safety coefficients can be determined by the numerical analysis and calculation. Besides, through analyzing and comparing the calculation results, it shows that seepage has a negative impact on slope stability.

scholarly journals Stability of Soil Cutting and Side Slope Based on Stress Route Theory

2015 ◽  
Vol 2 ◽  
pp. 1
Author(s):  
Zhaohong Ji
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Effective Stress ◽  
Analytical Method ◽  
Soil Slope ◽  
Safety Coefficient ◽  
Side Slope ◽  
Stress Changes ◽  
Soil Cutting ◽  
The Impact

<p>The stress route analytical method compensates for the limitation of traditional soil slope stability analytical method. Since it disregards the impact of effective stress route on the stress status and anti-shear strength of soil slope, it maps out the soil stress route drawing in the excavation process, and marks the anti-shear strength and shear stress changes under various conditions of soil. It causes the changes of the safety coefficient rules in the excavation of soil slope and affects the excavation stability of soil cutting and side slope. The result reveals: (1) The main analytical method of side slope stability which covers both the limit balance method and finite unit method fails to consider the impact of effective stress route on the existing stress status and anti-shear strength of soil slope; the stress route analytical method is able to overcome this limitation to a certain degree. (2) The stress route theory is adopted for analysis, in which, it can projected the whole stress of typical and most dangerous area of the slope, able to analyse the anti-shear strength of soil in a real-time manner, manage to express the safety coefficient changes in the stress route drawing and provides a selection of a suitable excavation plan by contrast. (3) In the overall excavation, the slope toe suffers from obvious stress concentration which expands to the surrounding areas and inconvenient for the side slope stability in the excavation.</p>

Soil Slope Stability Evaluation in Real-Time Based on Displacement Monitor

2013 ◽  
Vol 303-306 ◽  
pp. 782-785
Author(s):  
Ping Jiang ◽  
Jun Ru He
Keyword(s):  
Numerical Simulation ◽  
Slope Stability ◽  
Real Time ◽  
Stable State ◽  
Reduction Factor ◽  
Strength Reduction ◽  
Soil Slope ◽  
Strength Reduction Factor ◽  
Factor Form ◽  
Slope Displacement

The displacement is the most easily exact acquisition parameter in soil slope. In order to master the stable state of slope in real-time and accurately, the evaluation analysis of soil slope stability based on the information of displacement monitor is established. The Strength Reduction Method is used to describe the stable state of slope. According to Neural Network Algorithm, take the data of Finite Element Method numerical simulation, the function relationship between strength reduction factor and slope displacement is formed, which can calculate the Strength Reduction factor form slope displacement, then slope stability is obtained. At last, efficiency and applicability of this method is verified with a group of numerical simulation data.

scholarly journals Strength Characteristics and Slope Stability of Expansive Soil from Pingdingshan, China

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Ju-yun Zhai ◽  
Xiang-yong Cai
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Expansive Soil ◽  
Friction Angle ◽  
Natural Soil ◽  
Soil Slope ◽  
The Finite Element Method ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
The Stability

By analyzing the characteristics of expansive soil from Pingdingshan, China, the shear strength parameters at different water contents, dry densities, and dry-wet cycles of expansive soil are obtained. It is found that, at higher soil-water content, the internal friction angle is 0° and the shallow layer of expansive soil slope will collapse and destroy; this has nothing to do with the height of the slope and the size of the slope. The parameters of soil influenced by atmosphere are the ones which have gone through dry-wet cycles, and the parameters of soil without atmospheric influence are the same as those of natural soil. In the analysis of slope stability, the shear strength parameters of soil can be determined by using the finite element method, and the stability coefficient of the expansive soil slope can be calculated.

Study on the Shear Strength Parameters under Different Freezing and Thawing Cycles of Soil Slope in China

2013 ◽  
Vol 860-863 ◽  
pp. 1280-1283
Author(s):  
He Wu ◽  
Qi Ge ◽  
Jing Bo Tian
Keyword(s):  
Shear Strength ◽  
Slope Failure ◽  
Influence Factor ◽  
Failure Surface ◽  
Soil Slope ◽  
Shear Strength Parameters ◽  
Freezing And Thawing ◽  
Strength Parameters ◽  
Shear Strength Reduction Method ◽  
Soil Interface

In seasonal frozen regions, shallow landslide hazards in soil slopes usually happen. The type of failure surface is always on the freezing and thawing surface in the soil slope. So the direct influence factor of soil slope failure is the soil shear strength of the freezing and thawing (F-T) surface. The shear strength of the soil is determined by the two parameters of Cohesion c and Friction angle φ. In this study model experiment of F-T soil interface with different aggregate materials is designed by alternating the F-T cycle times, then the parameters c and the φ were obtained. Finally the deterioration modal of the two shear strength parameters of soil interface was put forward. The results demonstrated when the slope stability in the seasonal frozen regions was analyzed using shear strength reduction method, the two deterioration modals can provide the data reference for the analysis.

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