Influence of counter-tilted failure surface angle on the stability of rock slopes subjected to block toppling failure mechanisms

2018 ◽  
Vol 78 (4) ◽  
pp. 2535-2550 ◽  
Author(s):  
Victor Mwango Bowa ◽  
Yuanyou Xia
Keyword(s):  
Failure Mechanisms ◽  
Failure Surface ◽  
Rock Slopes ◽  
Toppling Failure ◽  
The Stability ◽  
Surface Angle

scholarly journals Analysis of Flexural Toppling Failure in Rock Slopes Using Discrete Element Method

2021 ◽  
Vol 9 ◽  
Author(s):  
Yun Zheng ◽  
Runqing Wang ◽  
Congxin Chen ◽  
Fei Meng
Keyword(s):  
Surface Deformation ◽  
Distinct Element ◽  
Human Life ◽  
Failure Surface ◽  
Displacement Discontinuity ◽  
Rock Slopes ◽  
Deformation And Failure ◽  
Toppling Failure ◽  
Flexural Toppling ◽  
Flexural Toppling Failure

Flexural toppling failure is a common failure mode of natural and artificial rock slopes, which has caused serious damage to human life and property. In this work, an advanced numerical method called the Universal Distinct Element Code (UDEC) was used to study the mechanism of flexural toppling failure. In total, more than twenty slope models were built and analyzed. Two new parameters (displacement discontinuity and transition coefficient of failure surface) were introduced to present a further understanding of flexural toppling. The results show the failure zone of rock slopes subjected to flexural toppling includes two parts: the first-order instability part (FOIP) and the independent toppling zone (ITZ). The FOIP can be further divided into two subzones: the sliding zone (SZ) and the superimposed toppling zone (STZ). The occurrence of surface deformation discontinuities is the precursor to flexural toppling failure. The first displacement discontinuity occurs on the boundary between the FOIP and the ITZ. The angle, spacing, and angle of the joints, the angle of the slope has a significant influence on the stability of anti-dip bedding rock slopes. However, they do not affect the deformation and failure pattern of the slope.

Assessing the Stability of Rock Slopes with Respect to Block-Flexure Toppling Failure Using a Force-Transfer Model and Genetic Algorithm

2020 ◽  
Vol 53 (8) ◽  
pp. 3433-3445
Author(s):  
Yun Zheng ◽  
Congxin Chen ◽  
Fei Meng ◽  
Haina Zhang ◽  
Kaizong Xia ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Transfer Model ◽  
Rock Slopes ◽  
Force Transfer ◽  
Toppling Failure ◽  
The Stability

3D stability analysis method for toppling failure on rock slopes

2021 ◽  
pp. qjegh2021-010
Author(s):  
Xiao-Gang Wang ◽  
Xin-Chao Lin
Keyword(s):  
Mechanical Properties ◽  
Stability Analysis ◽  
Safety Factor ◽  
Yield Criterion ◽  
3D Models ◽  
Rock Slopes ◽  
Block System ◽  
Toppling Failure ◽  
The Stability ◽  
Definition Of

In this paper, an optimized solution method is proposed for the 3D stability analysis of rock slopes subject to toppling failure based on their geometric and mechanical properties. It was verified by a 3D block system that focused on the geometric properties of toppling slopes as a research object, considering the force and its action point on the interface of the block system as unknown variables, as well as introducing the definition of a safety factor considering both tension and shear strength reduction. The proposed method implied setting constraints, such as the balance equation corresponding to block force and moment, as well as non-violation of the yield criterion, considering the minimum value of the safety factor as the objective function. It was applied to the analysis of two typical 3D models simulating toppling failure on slopes. The example of a 3D spherical toppling slope was reconstructed and corroborated by calculations. The experimental results demonstrated that the proposed method could appropriately reflect the mechanical properties and stability behavior of a 3D toppling slope, thereby facilitating the analysis of the stability of 3D toppling rock slope model.

scholarly journals Analytical technique for stability analyses of the rock slope subjected to slide head toppling failure mechanisms considering groundwater and stabilization effects

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Victor Mwango Bowa ◽  
Wenping Gong
Keyword(s):  
Analytical Solutions ◽  
Rock Slope ◽  
Failure Mechanisms ◽  
Jointed Rock ◽  
Shear Forces ◽  
Stability Analyses ◽  
Study Results ◽  
Toppling Failure ◽  
The Stability ◽  
Jointed Rock Slope

AbstractThe contributions of the current analytical models on the prediction of the stability of the slope subjected to slide head toppling failure mechanisms, have always focused on the idealized geometry comprising regular blocks dipping into the slope face. Besides, the influence of groundwater and stabilizations from the lowermost block of the slope have been overlooked in the available literature. In this article, the analytical solutions that incorporates the kinematic mechanisms of the jointed rock slope under the influence of groundwater and stabilizing the lowermost block subjected to slide head toppling are derived based on the limit equilibrium. Furthermore, a real slide head toppling failure case history was studied to illustrate the effectiveness of the presented analytical solutions. The investigation results indicate that the presence of groundwater in the jointed rock slope, lowers the distributions of the normal and shear forces thereby inducing slide head toppling. Reinforcing the lowermost block of the slope, enhances the distributions of the normal and shear forces thus improving the stability of the jointed rock slope. The study results depict that the presented analytical solutions can provide an accurate and efficient stability analyses of the jointed rock slope subjected to slide head toppling failure mechanisms considering the presence of groundwater and stabilization effects.

scholarly journals Assessment of Slope Instability and Risk Analysis of Road Cut Slopes in Lashotor Pass, Iran

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Mohammad Hossein Taherynia ◽  
Mojtaba Mohammadi ◽  
Rasoul Ajalloeian
Keyword(s):  
Rock Mass ◽  
Risk Analysis ◽  
Rock Slope ◽  
Classification Systems ◽  
Slope Instability ◽  
Rock Slope Stability ◽  
Rock Slopes ◽  
The Stability ◽  
Cut Slopes ◽  
Road Cut Slopes

Assessment of the stability of natural and artificial rock slopes is an important topic in the rock mechanics sciences. One of the most widely used methods for this purpose is the classification of the slope rock mass. In the recent decades, several rock slope classification systems are presented by many researchers. Each one of these rock mass classification systems uses different parameters and rating systems. These differences are due to the diversity of affecting parameters and the degree of influence on the rock slope stability. Another important point in rock slope stability is appraisal hazard and risk analysis. In the risk analysis, the degree of danger of rock slope instability is determined. The Lashotor pass is located in the Shiraz-Isfahan highway in Iran. Field surveys indicate that there are high potentialities of instability in the road cut slopes of the Lashotor pass. In the current paper, the stability of the rock slopes in the Lashotor pass is studied comprehensively with different classification methods. For risk analyses, we estimated dangerous area by use of the RocFall software. Furthermore, the dangers of falling rocks for the vehicles passing the Lashotor pass are estimated according to rockfall hazard rating system.

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