The Loess Slope Stability Study

2013 ◽  
Vol 380-384 ◽  
pp. 4827-4829 ◽  
Author(s):  
Shi Qiang Xu ◽  
Tao Zhao
Keyword(s):  
Slope Stability ◽  
Stability Study ◽  
Circular Arc ◽  
Highway Engineering ◽  
Loess Slope ◽  
Stability Of Slope ◽  
Set Up ◽  
The Stability

We often use circular arc method when calculating the stability of the slope. But this kind of method ignores how the slope rate of top influences stability of slope. In this thesis, a destruction model of loess slope is set up to study the regular rule of how the slope rate of top influences stability of slope, which will have great guiding significance in the construction of slopes in highway engineering.

scholarly journals Parametric Analysis of Slope Stability for River Embankment

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. 

On the Stability of Unsaturated Loess Slope under Tunneling Condition

2011 ◽  
Vol 233-235 ◽  
pp. 2678-2681 ◽  
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.

The Records of Slope Reinforcement Engineering in a Loess City

2012 ◽  
Vol 226-228 ◽  
pp. 1365-1370
Author(s):  
Qi Xia Liu ◽  
Liang Fan
Keyword(s):  
Slope Stability ◽  
Good Practice ◽  
Stability Study ◽  
Practice Effect ◽  
Slope Instability ◽  
Loess Landslide ◽  
Loess Area ◽  
Loess Slope ◽  
Geological Conditions ◽  
Reinforcement Measures

This article selected a typical loess slope engineering as the research object, and through the characteristics of loess landslide, landslide environmental geological conditions, the formation mechanism of the landslide study of the loess area of urban slope instability factors, loess slope stability of the calculation method and reinforcement measures. This paper adopts the theory of Morgenstern-Price to analyzing the stability of the slope, referencing with Sweden finite slice method, Simplified Bishop method, Simplify Janbu method. The reinforcement adopts the technology of possessed anchor to disposing the loess slope, and has good Practice effect. The loess slope stability study area has a large reference.

scholarly journals Stability study of open mine slopes at pit 22 GN PT Kitadin Site Embalut, Kutai Kartanegara Regency, East Kalimantan Province

2021 ◽  
Vol 24 (1) ◽  
pp. 47-56
Author(s):  
Tandidatu Deny ◽  
◽  
Sundek Hariyadi ◽  
Keyword(s):  
Safety Factor ◽  
Stability Study ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Activities ◽  
East Kalimantan ◽  
Stability Of Slope ◽  
The Stability ◽  
Excavation Site ◽  
Highwall Slope

The stability of slope, both on the slope of work and the final slope, is a very important aspect of slope stability, both on the slope of work and the final slope in open pit mining activities. The inconsistency of the slopes will result in the collapse of rocks around the excavation site. This happens because the condition of the rock when it has not been excavated is generally balanced. However, due to the discontinuous patterns that occur other than naturally and also due to the mining activities such as excavation, blasting and others, cause a reduction in the retaining force of the rock on the slope results in the equilibrium of the force tends to shift and is not balanced. Study of the stability of the open pit highwall slope at PIT 22 GN PT Kitadin Site Embalut, Kutai Kartanegara Regency, East Kalimantan Province was carried out with the aim to know the rock characteristics, to calculate slope geometry stable safety factors, and to recognize the type of landslide using a bishop method. The results of the modeling consist of several heights and slopes, as well as angles that is formed. Section AA’ has a safety factor value of 1.387, section BB has a safety factor of 1.482, section BB' has a safety factor value of 1.390, section DD' has a safety factor value of 1.318, section EE has a safety factor value of 2,381, section FF' has a safety factor value of 2.426, section GG' has a safety factor value of 2.424, section HH 'has a safety factor value of 2.339.

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.

The Records of Slope Reinforcement Engineering in a Loess City

2012 ◽  
Vol 190-191 ◽  
pp. 1227-1233
Author(s):  
Qi Xia Liu ◽  
Liang Fan
Keyword(s):  
Slope Stability ◽  
Stability Study ◽  
Slope Instability ◽  
Loess Landslide ◽  
Loess Area ◽  
Loess Slope ◽  
Slope Engineering ◽  
Slope Reinforcement ◽  
Geological Conditions ◽  
Reinforcement Measures

This article selected a typical loess slope engineering as the research object, and through the characteristics of loess landslide, landslide environmental geological conditions, the formation mechanism of the landslide study of the loess area of urban slope instability factors, loess slope stability of the calculation method and reinforcement measures, the loess slope stability study area has a large reference.

Numerical Analysis of Deformation and Stability of Rock Slope under Rainfall Condition

2012 ◽  
Vol 594-597 ◽  
pp. 2506-2511
Author(s):  
Bing Hua Zhao ◽  
Shi Ping Zhang
Keyword(s):  
Rock Slope ◽  
Friction Angle ◽  
Element Model ◽  
Rainfall Condition ◽  
Deformation Law ◽  
Stability Of Slope ◽  
Stress And Deformation ◽  
Set Up ◽  
The Stability ◽  
Stability Of Rock Slope

Combining an example of rock slope engineering, the finite element model of excavation, reinforcement with rainfall infiltration conditions is built up. The process of stage excavation and reinforcement of the slope are simulated, and the stress and deformation law and displacement change of the slope during each stage period are analyzed, and the stability of slope is evaluated under some conditions. Moreover, the discontinuous deformatioanalysis model is set up, the limited internal friction angle of the sliding face of slope is obtained, and the slope stability is evaluated. It was shown that the conclusion of two methods was consistent, and the slope was basically stable.

scholarly journals Effects of Bonded Tyres on Leachate Recirculation of Bioreactor Landfills

2017 ◽  
Vol 11 (1) ◽  
pp. 552-562 ◽  
Author(s):  
Huijie Zhang ◽  
Jie Heng ◽  
Dongsheng Jeng ◽  
Haixia Xu
Keyword(s):  
Slope Stability ◽  
Momentum Balance ◽  
Bioreactor Landfill ◽  
Bioreactor Landfills ◽  
Leachate Recirculation ◽  
Local Factor ◽  
Outflow Rate ◽  
Speed Up ◽  
Stability Of Slope ◽  
The Stability

Introduction: In bioreactor landfills, leachate recirculation significantly influences the process of stabilization and the stability of slope. Method: To speed up the leachate recirculation and reduce its adverse impact on slope stability, this paper proposes a new method which constructs a spatial net consisted of bonded whole tyres in the municipal waste during landfilling. Results and Conclusion: In this study, a numerical two-permeability flow model was used to investigate the effects of tyres embedding on the outflow rate of leachate injection. Furthermore, it was coupled with momentum balance equations to determine the local factor of safety of slope stability. The established model was applied to a simplified bioreactor landfill. The simulation results demonstrated that the tyre net can accelerate the rate of leachate injection and contribute to distribute the liquid more uniformly. Meanwhile, the slope stability was improved due to the enforcement of waste in the presence of tyres.

scholarly journals Damped perturbations in stellar systems: Genuine modes and Landau-damped waves

2021 ◽  
Author(s):  
E V Polyachenko ◽  
I G Shukhman ◽  
O I Borodina
Keyword(s):  
Initial Perturbation ◽  
Stability Study ◽  
Landau Damping ◽  
Complex Conjugate ◽  
Stellar Systems ◽  
Initial Value ◽  
Set Up ◽  
The Stability ◽  
The Waves ◽  
Problem Versus

Abstract This research was stimulated by the recent studies of damping solutions in dynamically stable spherical stellar systems. Using the simplest model of the homogeneous stellar medium, we discuss nontrivial features of stellar systems. Taking them into account will make it possible to correctly interpret the results obtained earlier and will help to set up decisive numerical experiments in the future. In particular, we compare the initial value problem versus the eigenvalue problem. It turns out that in the unstable regime, the Landau-damped waves can be represented as a superposition of van Kampen modes plus a discrete damped mode, usually ignored in the stability study. This mode is a solution complex conjugate to the unstable Jeans mode. In contrast, the Landau-damped waves are not genuine modes: in modes, eigenfunctions depend on time as exp ( − iωt), while the waves do not have eigenfunctions on the real v-axis at all. However, ‘eigenfunctions’ on the complex v-contours do exist. Deviations from the Landau damping are common and can be due to singularities or cut-off of the initial perturbation above some fixed value in the velocity space.

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