scholarly journals Stability Analysis of Gabion wall with Tieback in Seismic Regions

2017 ◽  
Vol 3 (5) ◽  
pp. 319-331 ◽  
Author(s):  
Hamid Asadpour ◽  
Tohid Akhlaghi
Keyword(s):  
Stability Analysis ◽  
Slope Stabilization ◽  
Bam Earthquake ◽  
Material Condition ◽  
Stability Of Slopes ◽  
Gravel Soil ◽  
Dynamic Forces ◽  
Slope Stabilization Methods ◽  
Gabion Walls ◽  
Static Coefficient

One of the most important issues in the construction of highways, mountain and urban roads is known as slope stabilization. If the necessary actions for protection are not considered, it could lead to problems and events such as landslides, settlements and even destruction of roads. There are many methods for stabilizing slopes such as Gabion walls and Tiebacks. This study can be used as the beginning of a new synthetic method where the Gabion wall is combined with Tiebacks. Gabion walls and tiebacks can be known as the most flexible methods of slope stabilization methods, because of this reason, if they can be combined with each other, it should show very good results in front of dynamic and even static forces. This combination is the novel point of this research. In this study at first, the gabion wall will be analysed in different loading conditions, and then to deal with earthquake dynamic forces the tiebacks will be used to increase the gabion walls stability.The software that is used in this study is GEO5 software, nowadays this software can be introduced as one of the best slope stability analysis software's. The results of this study showed that the designed gabion wall could be stable in dense silty gravel soil (GM) in 8.5-meter slope, and with magnitude of 0.25 horizontal coefficient of Manjil earthquake, but in the same geometry and material condition and impact of 0.4 magnitude horizontal coefficient of Bam earthquake it couldn't be stable alone. In this condition four rows of 18 meter tiebacks could stable the gabion wall very well. In this model, under loading condition 3 (with horizontal and vertical pseudo-static coefficient of Bam earthquake) that had the most vertical pseudo-static coefficient, the 23-meter tieback anchors with 12-degree inclination respect to horizontal could stable the considered gabion wall. This result could show that, the combination of gabion walls with tieback anchors gives a satisfactory result and it is an efficient and helpful method for stability of slopes in front of earthquake and dynamic forces.

Improvements in Lightly Loaded Rotor/Bearing and Rotor/Seal Models

1988 ◽  
Vol 110 (2) ◽  
pp. 129-136 ◽  
Author(s):  
A. Muszynska
Keyword(s):  
Stability Analysis ◽  
Fluid Dynamic ◽  
Velocity Ratio ◽  
Nonlinear Function ◽  
Circumferential Velocity ◽  
Rotating Shaft ◽  
Model Adequacy ◽  
Dynamic Forces ◽  
Key Factor ◽  
Lateral Mode

A model for lightly loaded steadily rotating shaft/bearing/seal systems is proposed in this paper. The model is based on modal characteristics for the rotor, and rotational characteristics for the fluid dynamic forces generated in bearings and/or seals. The fluid average circumferential velocity ratio as a nonlinear function of shaft eccentricity represents a key factor in the model. The model is extremely useful for rotor stability analysis. The model adequacy was proved for one and two lateral mode models of rotors.

Influence de surcharges concentrées sur la stabilité des talus

1982 ◽  
Vol 19 (3) ◽  
pp. 396-400
Author(s):  
Pierre Tenier ◽  
Pierre Morlier
Keyword(s):  
Finite Element ◽  
Stability Analysis ◽  
Stress Distribution ◽  
Slope Stability ◽  
Equivalent Stress ◽  
Failure Surface ◽  
Stress Distributions ◽  
Concentrated Loads ◽  
Slope Stabilization ◽  
Bishop’S Method

Concentrated loads, in particular when horizontal, are not properly taken into account in the simple methods of slope stability analysis such as Bishop's method. It is therefore proposed to replace in Bishop's equations any surcharge by a statically equivalent stress distribution on the failure surface. For reasons of simplicity, this distribution is taken according to Flamant, slightly modified to fit stress distributions obtained from finite element studies. An application is presented in the form of the optimization of a slope stabilization by tie-backs. [Journal translation]

scholarly journals Fuzzy and Classical MCDM Techniques to Rank the Slope Stabilization Methods in a Rock-Fill Reservoir Dam

2017 ◽  
Vol 3 (6) ◽  
pp. 382-394 ◽  
Author(s):  
Sina Shafiee Haghshenas ◽  
Reza Mikaeil ◽  
Sami Shaffiee Haghshenas ◽  
Masoud Zare Naghadehi ◽  
Pedram Sirati Moghadam
Keyword(s):  
Fuzzy Topsis ◽  
The Body ◽  
Slope Stabilization ◽  
Rock Fill ◽  
The North ◽  
Soil Cement ◽  
North Of Iran ◽  
Additional Costs ◽  
Slope Stabilization Methods ◽  
Inappropriate Choice

Slope stabilization is one of the most crucial tasks in rock-fill reservoir dam projects to prevention of erosion and destruction of upstream and downstream slopes. Inappropriate choice and design of the protection can cause irreparable damages imposing additional costs and time to the project. In this paper, the body slope ranking is conducted by using the classical and fuzzy multi-criteria decision making approaches specifically VIKOR and Fuzzy-TOPSIS methods. To this aim, eight important and effective criteria were considered to select the most appropriate cover among five most common ones for protecting and conserving body slope of the rock-fill dams. The study was conducted on a dam in Bijar city located in the province of Guilan, the north of Iran. According to results of a comparative analysis using fuzzy and classical MCDM techniques, the concrete facing cover and the soil-cement cover have placed at the highest and lowest ranks to protect the body of the dam, respectively, suggested by both employed methods.

Stability Analysis of a Reinforced Soil Slope Based on the Strength Reduction Method

2012 ◽  
Vol 204-208 ◽  
pp. 3031-3034 ◽  
Author(s):  
Li Wang ◽  
Shi Mei Wang
Keyword(s):  
Plastic Deformation ◽  
Stability Analysis ◽  
Slope Stability ◽  
Reduction Method ◽  
Geotechnical Engineering ◽  
Reinforced Soil ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Elastic Plastic ◽  
Stability Of Slopes

Apply large general-purpose finite element analysis software ABAQUS as a platform, The criterion of iteration non-convergence conventionally used for assessing the instability state of slopes,and an example is given to the following conclusions: The strength reduction method based on ABAQUS simulate anti-slide pile slope stability analysis that has a true reflection of the elastic-plastic deformation in geotechnical engineering,it can be widely used in elastic-plastic deformation problems in geotechnical engineering. The anti-slide pile can effectively improve the stability of slopes, setting up anti-slide pile egitimately in the soil plays an important role at the safety of slope stability.

scholarly journals Slope stability analysis of man-made soil body surrounding the abandoned hydraulic dump

2020 ◽  
pp. 47-55
Author(s):  
Karablin Mikhail ◽  
◽  
Prostov Sergei ◽  
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Pore Pressure ◽  
Slope Stability Analysis ◽  
Geological Survey ◽  
Actual State ◽  
Overburden Rock ◽  
Geophysical Model ◽  
Stability Of Slopes ◽  
The Stability

Introduction. Pit slope sections directly adjoining hydraulic dumps are characterized by the higher risk of landslide, especially in case of storing dry overburden rock over the hydraulically filled overburden. It is contributed to by the combination of the following factors: increase of the total height of the slope, development within the slope of a waterlogged zone of weakness with complex footprint map and depth configuration; excessive pore pressure within this zone which grows by means of adding dry dump to hydraulically filled rock. To reduce risks connected with man-made soil body slope stability violation, slope stability analysis is carried out based on the results of geological survey, hydrogeological observations and geophysical sounding. Research aims to analyze the stability of the Krasnobrodsky coal pit man-made mass adjoining the Bakhtykhtinsky hydraulic dump based on the 3D geological-geophysical model. Methodology. The authors of the article offered and realized the algorithm of analyzing the stability of slopes based on 3D geological and geophysical models formed by integrating geological, hydrogeological and geophysical data. Results. Based on geological survey data analysis, hydrogeological survey and electric sounding, 3D geological-geophysical model of a man-made soil body adjoining Bakhtykhtinsky hydraulic dump has been built. Slope stability analysis of an actual state of the man-made soil body has been carried out. ISSN 0536-1028 «Известия вузов. Горный журнал», № 5, 2020 55 Summary. In order to develop a 3D geological-geophysical model, in addition to slope geometry, it is necessary to set the boundaries of waterlogged rock in a footprint map and in depth, and monitor pore pressure within this zone. To determine slope section with minimum safety factor it is necessary to carry out cyclic calculation with gradual reduction of approach and design section rotation increment.

Stability Analysis for Slopes of Maerdang Hydropower Station with the Three-Dimensional Limit Equilibrium Method

2013 ◽  
Vol 275-277 ◽  
pp. 1427-1430
Author(s):  
Yi Sheng Huang ◽  
Jian Lin Li
Keyword(s):  
Stability Analysis ◽  
Limit Equilibrium ◽  
Three Dimensional ◽  
Limit Equilibrium Method ◽  
Hydropower Station ◽  
Stability Of Slopes ◽  
Equilibrium Method ◽  
The Face ◽  
The Stability ◽  
The Right

Firstly analyzed the stability of blocks with block theory and secondly evaluated the stability of blocks with three-dimensional limit equilibrium method and finally evaluated the whole stability of slopes. Stability analysis for the slope of Maerdang hydropower station shows that natural slopes which belong to the upstream of Hadehei ditch on the right bank will not occur wedge slide, tailrace slopes of hydropower station have not sliding slopes searched which are in potential slide, if taking some measures to reinforce the stability of man-made slopes on the face rock-fill hub, which may meet the demand of the specification.

A transient analysis of slope stability following drawdown after flooding of a highly plastic clay

1999 ◽  
Vol 36 (6) ◽  
pp. 1151-1171 ◽  
Author(s):  
G J Pauls ◽  
E Karl Sauer ◽  
E A Christiansen ◽  
R A Widger
Keyword(s):  
Stability Analysis ◽  
Pore Water ◽  
Factor Of Safety ◽  
Field Measurements ◽  
Stability Of Slopes ◽  
Pore Water Pressures ◽  
Seepage Model ◽  
Transient Seepage ◽  
The Stability ◽  
Plastic Clays

The stability of slopes at bridge abutments across the Carrot River in east-central Saskatchewan was not influenced significantly by drawdown after flooding in the spring of 1995. Traditional methods of analysis for rapid drawdown predicted the factor of safety of slopes on highly plastic clays of proglacial Lake Agassiz would drop to 0.65 from an initial value of 1.0. Deformation along a well-defined slip plane has persisted at a more or less constant, slow rate since the bridge was constructed in 1975. The river rose approximately 10 m during a flood in the spring of 1995, yet there was only minimal response in piezometers and no measurable increase in the rate of deformation recorded by inclinometers. Pore-water pressures from a steady state seepage model, which was calibrated from piezometer measurements, were integrated into a stability analysis. Changes in pore-water pressures caused by flooding and subsequent drawdown were characterized from a transient seepage model using the flood hydrograph as a flux boundary. The stability analysis integrated with the transient seepage model estimated the factor of safety would drop from 1.0 to 0.91 after drawdown. Field measurements indicated the reduction in factor of safety was even less.

Sign in / Sign up

Export Citation Format

Share Document