Analysis Range for the Natural Slopes with Thickness of the Weathered Soil Layer in Seepage and Stability Analysis

2016 ◽  
Vol 16 (6) ◽  
pp. 347-361
Author(s):  
Hyongjong Kim ◽  
◽  
Yeongsaeng Lee ◽  
Keyword(s):  
Stability Analysis ◽  
Soil Layer ◽  
Weathered Soil ◽  
Natural Slopes

scholarly journals Development Trend and Stability Analysis of Creep Landslide With Obvious Slip Zone Under Rainfall-Taking Xinchang Xiashan Basalt Slope as an Example

2022 ◽  
Vol 9 ◽  
Author(s):  
Chunyan Bao ◽  
Lingtao Zhan ◽  
Yingjie Xia ◽  
Yongliang Huang ◽  
Zhenxing Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Stability Analysis ◽  
Soil Layer ◽  
Heavy Rain ◽  
Development Trend ◽  
Sliding Surface ◽  
Landslide Area ◽  
Finite Element Software ◽  
Sliding Zone

The creep slope is a dynamic development process, from stable deformation to instability failure. For the slope with sliding zone, it generally creeps along the sliding zone. If the sliding zone controlling the slope sliding does not have obvious displacement, and the slope has unexpected instability without warning, the harm and potential safety hazard are often much greater than the visible creep. Studying the development trend of this kind of landslide is of great significance to slope treatment and landslide early warning. Taking Xiashan village landslide in Huishan Town, Xinchang County, Zhejiang Province as an example, the landslide point was determined by numerical simulation in 2006. Generally, the landslide is a typical long-term slow deformation towards the free direction. Based on a new round of investigation and monitoring, this paper shows that there are signs of creeping on the surface of the landslide since 2003, and there is no creep on the deep sliding surface. The joint fissures in the landslide area are relatively developed, and rainfall infiltration will soften the soft rock and soil layer and greatly reduce its stability. This paper collects and arranges the rainfall data of the landslide area in recent 30 years, constructs the slope finite element model considering rainfall conditions through ANSYS finite element software, and carries out numerical simulation stability analysis. The results show that if cracks appear below or above the slope’s sliding surface, or are artificially damaged, the sliding surface may develop into weak cracks. Then, the plastic zone of penetration is offset; In the case of heavy rain, the slope can unload itself under the action of rainfall. At this time, the slope was unstable and the landslide happened suddenly.

scholarly journals Application of Nor Sand Constitutive Model in a Highway Fill Embankment Slope Stability Failure Study

2018 ◽  
Vol 4 (10) ◽  
pp. 2252 ◽  
Author(s):  
Jiliang Li ◽  
Thiago Fernandes Leao
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Constitutive Model ◽  
Triaxial Compression ◽  
Soil Layer ◽  
Slope Stability Analysis ◽  
Static Liquefaction ◽  
North Eastern ◽  
North Eastern Part

This paper presents a case study of a static load induced liquefaction in a simple roadway widening project constructed in north eastern part of Ohio in 2008. The widening required an embankment fill, which moved nearly 4 feet vertically and 1 foot laterally after two days of installation. The main objective of the work is to demonstrate how a simple Constitutive model, in this case Nor Sand model, can represent the static liquefaction in loose sand layers under specific conditions. A set of parameters is assumed based on the soil properties and an Excel Spreadsheet is used for simulations of triaxial compression of sand. It was considered that the situation which led to the failure, and the situation after the solution adopted. Moreover, slope stability analysis is provided for validation of the original results using a commercial software. It was found that the model can represent through stress strain curves and stress paths the behavior of the soil layer which led to the embankment fill movement. As the original work considered only slope stability analysis to explain this phenomenon, the present study shows a different approach for the case study, and this is the main contribution of this research.

scholarly journals STABILITY ANALYSIS FOR EMBANKMENTS WITH GEOELECTRICITY

2020 ◽  
Vol 15 (2) ◽  
pp. 114-122
Author(s):  
Teddy Wartono Sudinda
Keyword(s):  
Stability Analysis ◽  
Groundwater Flow ◽  
Water Level ◽  
Human Activities ◽  
Soil Layer ◽  
Flow Patterns ◽  
Soil Density ◽  
The Stability ◽  
The Right

Abstract The collapse of the embankment is a problem that needs attention to find the right solution, so that the risk can be minimized. The condition of the embankment is influenced by the strength of the soil layer of the embankment, groundwater flow in the embankment, the condition of the water level of the embankment and human activities around the embankment. Changes in the quality of soil density in the embankment can form cavity zones within the embankment which cause changes in groundwater flow patterns in the embankment. The degradation of the soil layer of the embankment can cause piping, overtopping which is the cause of erosion of the embankment body and disturbs the stability of the embankment. Therefore, to determine the condition of the embankment soil layer, research on the stability of the embankment has been carried out using the geoelectric method at the location of the embankment in the Cipancuh and Penjalin reservoirs, so that an image of the embankment soil layer is obtained to determine the cavity zones in the embankment, the flow pattern in the embankment soil layer. Keywords:  cavity zones, flow patterns, geoelectric methods, the stability of the embankment.

An Evaluation of the Stability of Natural Slopes in Plastic Champlain Clays

1974 ◽  
Vol 11 (1) ◽  
pp. 165-181 ◽  
Author(s):  
K. Y. Lo ◽  
C. F. Lee
Keyword(s):  
Finite Element Method ◽  
Stability Analysis ◽  
Strength Characteristics ◽  
Stress Range ◽  
Natural Slope ◽  
Softening Behavior ◽  
State Of Stress ◽  
The Stability ◽  
Nonlinear Nature ◽  
Natural Slopes

A method of stability analysis was developed to accommodate the distinctly nonlinear nature of the strength envelopes for Champlain Sea clays in the low stress range appropriate to stability problems. Using this method an evaluation of natural slope failures in Champlain Sea clays was carried out based on strength characteristics determined with block samples from the sites of recent slides in Quebec. In view of some similarities in geotechnical properties and shear behavior, the strength characteristics so determined were also used to examine some of the recent slides in the Ottawa area. The results of stability analysis for eleven slides indicate that the field strength generally approaches the post-peak condition.To verify this condition, the state of stress of two slopes before sliding was determined by a finite element method accounting for work-softening behavior. The results of analysis show that the post-peak factor is very close to unity in the Quebec sites. The same observation may be applied to the slides in the Ottawa areas, provided that the post-peak strengths of the clays in these areas are verified.

The Analysis of Stability of Mine's Tailing Dam Based on the FLAC3D

2013 ◽  
Vol 353-356 ◽  
pp. 650-653
Author(s):  
Yuan Li ◽  
Yan Fei Cao ◽  
Xiu Jun Chang ◽  
Ya Jing Zhang
Keyword(s):  
Stability Analysis ◽  
Layer Structure ◽  
Soil Mechanics ◽  
Soil Layer ◽  
Physical And Mechanical Properties ◽  
Scientific Basis ◽  
Security Risk ◽  
Engineering Construction ◽  
Tailing Dam ◽  
Analysis Of Stability

Tailings dam is an important part of engineering construction of tailings pond. Stability analysis of tailing dam is of great significance, because it is the significant security risk of the project of tailings. FLAC3D program which based on Lagrange algorithm is especially suitable for solving the nonlinear large deformation problems in rock and soil mechanics engineering. After the adequate mastery of the soil layer structure, the physical and mechanical properties and the determination of the calculation parameters, the engineering software of FLAC3D and the numerical analysis method are utilized to analyze the integral stability of the tailing dam of Guangxi Xinfa Aluminum Company in Jingxi county. It can provide a scientific basis for the stability analysis of engineering construction of another tailing pond.

scholarly journals Slope Stability Analysis of “Vorobyovy Gory” Landslide in Moscow

2019 ◽  
Vol 11 (2) ◽  
pp. 90-94
Author(s):  
D. Tao ◽  
O.S. Barykina ◽  
K. Kang
Keyword(s):  
Sensitivity Analysis ◽  
Stability Analysis ◽  
Internal Friction ◽  
Slope Stability ◽  
Limit Equilibrium ◽  
Soil Layer ◽  
Friction Angle ◽  
Limit Equilibrium Method ◽  
Mechanical Parameters ◽  
Moscow River

 There are many engineering-geological problems in Moscow, including seepage deformation, karst and landslide. Among them, landslides develop along the Moscow River and its branches. This paper aims to analyze the slope stability of “Vorobyovy Gory” landslide with the help of the program GeoStudio. According to the limit equilibrium method, we can know the slope stability. In addition, we can know the internal friction angle among in the physical and mechanical parameters of soil layer has the greatest influences on its stability by sensitivity analysis. Finally, we can get the probability of damage by probabilistic analysis.

Slope stability analysis of riverbanks

1983 ◽  
Vol 20 (2) ◽  
pp. 335-343 ◽  
Author(s):  
Ashok K. Chugh
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Soil Mechanics ◽  
Limit Equilibrium ◽  
Computer Programs ◽  
Slope Stability Analysis ◽  
Alternative Form ◽  
Material Strength ◽  
Sample Problem ◽  
Natural Slopes

Practical considerations for the use of subsurface exploratory data and material strength data in slope stability calculations for estimating the factor of safety along potential slip surfaces in natural slopes are described and illustrated with a sample problem. An alternative form of the slope stability equations for the method of slices, using the limit equilibrium method and satisfying complete statics on each slice, is presented for plane problems. The shortcomings inherent in commonly available computer programs for the analysis of slope stability problems are discussed. Means to overcome some of the limitations are indicated and illustrated with a sample problem. It is suggested that the general purpose computer programs for slope stability analysis should use the complete form of the slope stability equations. The alternative form of the equations and the discussion of their solution are valid for slope stability analysis of natural slopes and embankment dams. Keywords: stability analysis, slope stability, riverbanks, lake banks, natural slopes, soil mechanics, embankments.

Sign in / Sign up

Export Citation Format

Share Document