Evaluation on the Stability of Slope at Faculty of Engineering and Built Environment (FKAB) using Slope/w

Abstract:Since the Wenchuan earthquake happened, the slope stability had been paid much more attention. The safety factor is an important parameter that can be used to evaluate the stability of slope. The pseudo-static method that based on limit equilibrium and the method of numerical simulation can calculate the safety factor accurately, but the velocity that gets the result is slow. If we can establish the relationship between safety factor and some other parameters, then we can calculate the safety factor by using the relationship more quickly. This paper establishes much relationship, such as the relationship between the rock mechanics parameters and the average danymic safety factor, the relationship between the rock mechanics parameters and the ratio of average danymic safety factor to static safety factor, the relationship between the rock mechanics parameters and the average earthquake acceleration coefficient, the relationship between the average earthquake acceleration coefficient and the ratio of average danymic safety factor to static safety factor, and the relationship between the earthquake acceleration coefficient and the ratio of danymic safety factor to static safety factor on the condition of different rock mass.

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A grid-based physical model to analyze the stability of slope unit

Geomorphology ◽

10.1016/j.geomorph.2021.107887 ◽

2021 ◽

pp. 107887

Author(s):

Shaojie Zhang ◽

Zhigang Ma ◽

Yongjian Li ◽

Kaiheng Hu ◽

Qun Zhang ◽

...

Keyword(s):

Physical Model ◽

Slope Unit ◽

Stability Of Slope ◽

The Stability ◽

Grid Based

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Parametric Analysis of Slope Stability for River Embankment

Journal of Advanced Engineering and Computation ◽

10.25073/jaec.202043.291 ◽

2020 ◽

Vol 4 (3) ◽

pp. 196

Author(s):

Dhrubo Haque ◽

Md Isteak Reza

Keyword(s):

Slope Stability ◽

Soil Property ◽

Failure Surface ◽

Worst Case ◽

Creative Commons ◽

Stability Of Slope ◽

The Stability ◽

Underlying Soil ◽

Open Access Article ◽

Stiff Soil

This paper has aimed to investigate the slope stability for various conditions like embankment geometry, water level and soil property. The analysis has been performed by using the XSTABL program for different slope heights, slope angles and flood conditions with a fixed soil cohesion value. Since the rapid drawdown is the worst case for a particular embankment therefore, the analysis has been further performed with different cohesion values. From this investigation it has been noticed that the increase of cohesion of soil can increase the stability to a great extent. All the analysises have been performed for twenty bore logs. It has been found that the underlying soil affects the stability of slope as the failure surface intersects the soil of this region. It has been also observed that the loose, liquefiable sandy soil decreases the stability while the stiff soil with sufficient cohesion value stabilizes the slope of embankment. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.

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Landslide Simulation Using Limit Equilibrium and Finite Element Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.857.555 ◽

2016 ◽

Vol 857 ◽

pp. 555-559 ◽

Cited By ~ 1

Author(s):

Zuhayr Md Ghazaly ◽

Mustaqqim Abdul Rahim ◽

Kok Alfred Chee Jee ◽

Nur Fitriah Isa ◽

Liyana Ahmad Sofri

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Factor Of Safety ◽

Slip Surface ◽

Limit Equilibrium ◽

Main Concern ◽

Analysis Method ◽

Stability Of Slope ◽

The Stability ◽

Element Method

Slope stability analysis is one of the ancient tasks in the geotechnical engineering. There are two major methods; limit equilibrium method (LEM) and finite element method (FEM) that were used to analyze the factor of safety (FOS) to determine the stability of slope. The factor of safety will affect the remediation method to be underdesign or overdesign if the analysis method was not well chosen. This can lead to safety and costing problems which are the main concern. Furthermore, there were no statement that issued one of the analysis methods was more preferred than another. To achieve the objective of this research, the soil sample collected from landslide at Wang Kelian were tested to obtain the parameters of the soils. Then, those results were inserted into Plaxis and Slope/W software for modeling to obtain the factor of safety based on different cases such as geometry and homogenous of slope. The FOS obtained by FEM was generally lower compared to LEM but LEM can provide an obvious critical slip surface. This can be explained by their principles. Overall, the analysis method chosen must be based on the purpose of the analysis.

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Analysis of Global Stability, Anchor Spacing, and Support Cable Loads in Wire Mesh and Cable Net Slope Protection Systems

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105191300120 ◽

2005 ◽

Vol 1913 (1) ◽

pp. 205-213 ◽

Cited By ~ 1

Author(s):

Navaratnarajah Sasiharan ◽

Balasingam Muhunthan ◽

Shanzhi Shu ◽

Thomas C. Badger

Keyword(s):

Numerical Models ◽

Wire Mesh ◽

System Failures ◽

Design Elements ◽

The Past ◽

Protection Systems ◽

Vertical Support ◽

Stability Of Slope ◽

The Stability ◽

Horizontal Support

Wire mesh and cable net slope protection have been in use for more than 50 years along North American highways to control rockfall on actively eroding slopes. The basic design of these systems is comparatively similar throughout North America. It consists of a top horizontal cable suspended by regularly spaced anchors, typically a perimeter or widely spaced grid of horizontal and vertical support cables, and double-twisted, hexagonal wire mesh laced to the support ropes. To date, the design of the slope protection systems has been based primarily on empirical methods, engineering judgment, and experience. Although these systems generally perform well, there is some consensus among geotechnical specialists that some elements in the system may be overdesigned or even unnecessary. In addition, system failures under a variety of loading conditions within the past few decades indicate that certain design elements may in fact be underdesigned for their desired application. Analytical and numerical models to evaluate the stability of slope protection systems are presented. The inclusion of interior horizontal support ropes in addition to the top horizontal rope does not reduce the stress within the mesh and accordingly provides no mechanical benefit. Results also show that the stresses on the vertical support rope are much smaller than the top horizontal support rope. Therefore, the vertical ropes do not need to be as strong as the top horizontal rope. Further, some useful design charts for the design of slope protection system are presented.

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Unsaturated Seepage and Fluid-Solid Coupling Analysis of Rainfall Infiltration of Slope

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3488 ◽

2011 ◽

Vol 255-260 ◽

pp. 3488-3492

Author(s):

Bao Lin Xiong ◽

Jing Song Tang ◽

Chun Jiao Lu

Keyword(s):

Pore Water ◽

Unsaturated Flow ◽

Pore Water Pressure ◽

Water Pressure ◽

Rainfall Infiltration ◽

Medium Permeability ◽

Stability Of Slope ◽

Transient Seepage ◽

The Stability ◽

Unsaturated Seepage

Rainfall is one of the main factors that influence the stability of slope. Rainfall infiltration will cause soil saturation changing and further influence pore water pressure and medium permeability coefficient. Based on porous media saturation-unsaturated flow theory, the slope transient seepage field is simulated under the conditions of rainfall infiltration. It is shown that change of pore water pressure in slope soil lag behind relative changes in rainfall conditions. As the rainfall infiltrate, unsaturated zone in top half of slope become diminution, the soil suction and shear strength reduce, so stabilization of soil slope is reduced.

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Causes Analysis and Control Measures of Landslide on Expressway from Yangshuo to Pingle in Guangxi

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.116 ◽

2013 ◽

Vol 353-356 ◽

pp. 116-119

Author(s):

Chan Juan Yu ◽

Yu Dong Peng

Keyword(s):

Transfer Coefficient ◽

Reference Value ◽

Control Measures ◽

The Other ◽

Retaining Structure ◽

Treatment Measures ◽

Stability Of Slope ◽

The Stability ◽

And Control ◽

Coefficient Method

According to the analysis on engineering geological and hydrological conditions of landslide on expressway from Yangshuo to Pingle in Guangxi, the formation mechanism of the landslide was summarized. The stability of slope was analyzed by mechanical transfer coefficient method. Then two kinds of effective preventions and treatment measures are proposed: setting retaining structure after drainage, or unloading after drainage. These measures have reference value to the management of the other landslide.

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On the Stability of Unsaturated Loess Slope under Tunneling Condition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.2678 ◽

2011 ◽

Vol 233-235 ◽

pp. 2678-2681 ◽

Cited By ~ 1

Author(s):

Xi An Li ◽

Rong Jian Li ◽

Gao Feng Che ◽

Wen Zheng ◽

Liang Li

Keyword(s):

Critical Factor ◽

Matric Suction ◽

Strength Reduction ◽

Sliding Surface ◽

Negative Effects ◽

Loess Slope ◽

Stability Of Slope ◽

The Stability ◽

Unsaturated Loess ◽

Work Done

As a unique mode of soil erosion, loess cavities often act as the critical factor to the stability of the highway slopes of unsaturated loess. In this paper, the unsaturated loess slope stabilities are comparatively studied in different cases through the developed program of the strength reduction FEM, such as loess cavities in different position, single- & twin cavities, occurrence and loss of matric suction etc. The work done in this paper revealed the mechanism how the tunneling and the matric suction have effect on the stability of unsaturated loess slope to some extent. The results not only indicate that the loess cavities favor to maintain the stability of slope with the cavities located near the slope's crest, while the loess cavities reduce the stability of slope with the cavities located near the slope's toe, but also disclose that the safety factor of the unsaturated loess slope increases and the potential sliding surface move downward with considering the matric suction and vice versa. In addition, the twin cavities near the slope's toe have the obvious negative effects on slope's stability.

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Stability Analysis of Unsaturated Soil Slopes under Rainfall Infiltration

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.126 ◽

2012 ◽

Vol 594-597 ◽

pp. 126-129 ◽

Cited By ~ 1

Author(s):

Rong Fang Zhou ◽

Xue Wen Lei ◽

Qing Shan Meng ◽

Cong Lin

Keyword(s):

Unsaturated Soil ◽

Equivalent Plastic Strain ◽

Material Model ◽

Rainfall Infiltration ◽

Finite Element Program ◽

Soil Material ◽

Element Program ◽

Stability Of Slope ◽

Transient Seepage ◽

The Stability

The principle of effective stress based on unsaturated soil material model and the boundary conditions of rainfall infiltration on the slope are introduced. The numerical model is built according to the example, and then the ABAQUS finite element program, which is combined with fluid-solid coupling, is used to simulate the problem of transient seepage field caused by rainfall infiltration. With the powerful post processing functions ability of ABAQUS program, we can observe the variation law with the time of pore-pressure distribution and displacement field and equivalent plastic strain. Moreover, the effect on the stability of slope under rainfall infiltration is analyzed.

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Study on the Influence of Stability for Higher Precipitous Open Pit Slope under Mining Blasting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3822 ◽

2011 ◽

Vol 255-260 ◽

pp. 3822-3826 ◽

Cited By ~ 2

Author(s):

Zhi Yu Zhang ◽

Long Fa Luan ◽

Ji Yao ◽

Jian Bin Xie ◽

Xiang Long Li

Keyword(s):

Large Deformation ◽

Limit Equilibrium ◽

Static Stability ◽

Open Pit ◽

Blasting Vibration ◽

Phosphate Mine ◽

Stability Of Slope ◽

The Stability ◽

Lagrange Element ◽

Element Method

Based on the hydrological, geologies and slope features of Jianshan phosphate mine in Yunnan province, the geomechanics model of slope was established. Then the static stability of different elevations in mining section was studied by using methods such as the rigid body limit equilibrium method, finite element method, continuum large deformation Lagrange element method. According to the supervise data of the mining blasting, the dynamic response of the slope in blasting was studied by continuum large deformation Lagrange element method, and some suggestions were proposed for following mining blasting. The research results show that the slope was in the stable status before blasting vibration. Current mining blasting vibration has little effect on the stability of slope, but would reduce the safety factor of the top of the slope. Single blasting would enlarge the instantaneous acceleration of the top of the slope in a ratio of 8.8% and 10.8%.

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