Strength Reduction Method for Slope Stability Analysis Based on a Dual Factoring Strategy

Wu, Shunchuan; Xiong, Liangfeng; Zhang, Shihuai

doi:10.1061/(asce)gm.1943-5622.0001249

Cited by 19 publications

(15 citation statements)

References 17 publications

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“…In order to evaluate slope stability in a mathematical principle, Zienkiewicz introduced an index in his famous article [18], the well-known strength reduction factor (SRF), to show the stability ability for a soil slope. In the recent decades, the strength reduction method (SRM) has been successful used in practice and engineering design [19,20]. Nevertheless, this method is not very effective for a jointed rock slope.…”

Section: Traditional Approaches In Slope Stability Analysismentioning

confidence: 99%

An integrated approach for jointed rock slope stability analysis using stochastic discrete fractures: A case study in mountains area

et al. 2019

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Stochastic discrete fractures are ubiquitous in practicing engineering and contribute much to the stability for geological mediums. In contrast to the traditional treatments based on continuum mechanics, we propose an integrated approach using discrete fractures based on an improved hybrid finite element method (FEM). A typical jointed rock slop is selected as a case study and then was simulated in the light of geological conditions for the study site. The basic equations of fracture domains are derived to generate stochastic discrete fractures which render a fundamental to the model. To implement this procedure through computer program, discrete fractures generating algorithm was developed. In the aspect of discretization, we presented a meshing scheme and proposed an algorithm to create fracture elements. To evaluate rock slope stability in a quantitative way, safety factor is calculated by strength reduction method. Numerical simulations were carried out showing the mechanical behaviors of jointed rock slope under different boundary conditions.

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Section: Traditional Approaches In Slope Stability Analysismentioning

confidence: 99%

An integrated approach for jointed rock slope stability analysis using stochastic discrete fractures: A case study in mountains area

et al. 2019

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“…1,2 The major tasks in slope stability assessment include computing the factor of safety (FS) and determining the location of the critical slip surface. 3 The FS is defined by Bishop 4 as the ratio of actual soil shear strength to the minimum shear strength required to prevent failure. Various methods have been used to compute the FS of slopes, these include the logarithmic spiral method, friction circle method, slope stability charts, and computer programs based on the limit equilibrium method (LEM), the shear strength reduction method (SRM), or boundary element methods (BEM).…”

Section: Introductionmentioning

confidence: 99%

“…Various methods have been used to compute the FS of slopes, these include the logarithmic spiral method, friction circle method, slope stability charts, and computer programs based on the limit equilibrium method (LEM), the shear strength reduction method (SRM), or boundary element methods (BEM). 3,5 Stability analyses are most accurately and conveniently carried out using computer techniques to avoid the tedium of long and complex hand computations. 6 Of these, the use of traditional limit equilibrium approaches using the methods of slices is still widely used in engineering practice.…”

Section: Introductionmentioning

confidence: 99%

A novel stability equation for the estimation of the factor of safety for homogeneous dry finite slopes

Sampa,

Schorr

2024

Num Anal Meth Geomechanics

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This paper introduces a novel closed‐form equation (surrogate model) for approximating the Morgenstern–Price estimate of the factor of safety of homogeneous dry finite slopes with circular failure surfaces. Unlike typically used methods, the proposed equation does not require the definition of a critical failure surface, splitting the soil mass into slices, or the iterative reduction of soil resistance to the limit state. It can be easily programmed into calculators or computers and accurately determines the minimum factor of safety based on the shear strength parameters and slope geometry—meaning that it is ideally suited for integration into reliability calculations. The equation is determined parametrically for various soil parameters and slope geometry using the Morgenstern–Price method and compares favorably with conventional techniques, such as slope stability charts, limit equilibrium, and strength reduction methods (SRM). From a practical perspective, the proposed equation greatly simplifies the analysis of the slope stability as the creation of a numerical model is not required and is suited to use in the feasibility stage of a project, for example, for large linear infrastructure projects with differing slope geometries or in situations where a quick assessment is desired.

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“…Benz et al 31 established a mathematical expression for the relationship between the GHB criterion and the MC criterion, and used the MC criterion reduction factors to determine the strength reduction based on GHB criterion. Wu et al 32 concluded that for intact rock, only uniaxial compressive strength and rock hardness should be used as strength indicators for GHB strength reduction. Fu et al 33 introduced the Mohr–Coulomb instantaneous friction angle as a variable, used the instantaneous Moore-Coulomb friction angle and cohesive strength to describe the shear strength of rock mass, and proposed a nonlinear shear strength reduction technique for slope stability calculations.…”

Section: Introductionmentioning

confidence: 99%

Assessing the rainfall infiltration on FOS via a new NSRM for a case study at high rock slope stability

Zhou

Zhang

Cheng

et al. 2022

Sci Rep

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Assessing the stability characteristics of high rock slope under rainfall via theoretical research, numerical simulation, and field monitoring is of great implications for safety construction in open-pit mine engineering. Thus, based on the Hoke-Brown criterion, instantaneous internal friction angle and cohesion of high-slope rock mass under high stress conditions were deduced, and a nonlinear strength reduction method for high rock slope was established. The safety factors of the open-pit mine were calculated by COMSOL Multiphysics, which considering the high rock southwest slope and detected rainfall in Dagushan Open-pit Mine, China. The results showed that high rock slope stability could be more accurately analyzed by the proposed method due to its full consideration of slope stress state effect compared with the equivalent Mohr- Coulomb method. When the slope is low, the difference between the calculation results of the equivalent Mohr- Coulomb method and the proposed method is small, but with the increase of the slope height, the difference between the two calculation results gradually increases. When the transient saturated is formed in the slope surface layer and gradually increases, the reduction rate of the factor of safety (FOS) gradually increases. When the total rainfall is the same, the effect of short-term heavy rainfall on slope stability is less than that of long-term ordinary rainfall. The results obtained form this work provided important insights into the stability of high rock slope and rainfall infiltration in open-pit mine, and the safety factor is crucial for guiding the mining process design.

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Strength Reduction Method for Slope Stability Analysis Based on a Dual Factoring Strategy

Cited by 19 publications

References 17 publications

An integrated approach for jointed rock slope stability analysis using stochastic discrete fractures: A case study in mountains area

An integrated approach for jointed rock slope stability analysis using stochastic discrete fractures: A case study in mountains area

A novel stability equation for the estimation of the factor of safety for homogeneous dry finite slopes

Assessing the rainfall infiltration on FOS via a new NSRM for a case study at high rock slope stability

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