Three-dimensional stability analysis of an urban slope located in João Monlevade, Brazil

Geotechnical stability analysis of slopes is an important tool for decision making in civil projects. Use of three-dimensional software for analysis of soil slope stability has increased in recent years. Rocscience Inc. created Slide3 software in 2017. Slide3 is a software that allows geotechnical engineers to calculate the factor of safety of complex 3D slope stability geometries that 2D models cannot fully simulate. In this context, this paper presents a three-dimensional stability analysis of a slope located in an urban area at city of João Monlevade, Minas Gerais, Brazil. The slope was selected due to the instability history in rainfall periods. Topography of the area was provided by the city council. Young and mature residual soils were identified in the studied slope. Young residual soil was physically classified as clay without gravels and presents in natura values of cohesion and friction angle, equal to 32 KPa and 23.97º, respectively. Mature residual soil was physically classified as clayey silt without gravels and presents in natura values of cohesion and friction angle, equal to 19 KPa and 23.30º, respectively. The factor of safety of the soil slope was equal 0.977, considering the slope saturated. The factor of safety of the drained slope was equal to 1.415. Generalized limit equilibrium (GLE) method was used in this equilibrium-limit analysis. The results stability analysis of the slope was coherent, once previous instability occurs in a period that was identified above average rainfall.

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Combined Effect of Rainfall Seepage and Seismic Shaking on Slope Stability by Using a Three-Dimensional Stability Analysis

International Journal of Engineering and Technology ◽

10.7763/ijet.2019.v11.1120 ◽

2019 ◽

pp. 39-43

Author(s):

Chien-Yuan Chen ◽

◽

Wei-Cheng Wu

Keyword(s):

Stability Analysis ◽

Slope Stability ◽

Dimensional Stability ◽

Three Dimensional ◽

Combined Effect ◽

Rainfall Seepage

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Slope Stability Analysis to Correlate Shear Strength with Slope Angle and Shear Stress by Considering Saturated and Unsaturated Seismic Conditions

Applied Sciences ◽

10.3390/app11104568 ◽

2021 ◽

Vol 11 (10) ◽

pp. 4568

Author(s):

Muhammad Israr Khan ◽

Shuhong Wang

Keyword(s):

Shear Stress ◽

Shear Strength ◽

Stability Analysis ◽

Slope Stability ◽

Factor Of Safety ◽

Slip Surface ◽

Limit Equilibrium ◽

Slope Angle ◽

Slope Stability Analysis ◽

Soil Slope

Assessment and analysis of soil slope stability is an important part of geotechnical engineering at all times. This paper examines the assessment of soil slope stability in fine-grained soils. The effect of change in shear strength (τ), shear stress (σ) and slope angle (β) on the factor of safety has been studied. It correlates shear strength with slope angle and shear stress by considering the horizontal seismic coefficients in both saturated and unsaturated conditions. The slope failure surface was considered a circular slip surface. Statistical package for social sciences (SPSS) and Slide, numerical modeling software and limit equilibrium slope stability analysis software, respectively, are used to find out the correlations between the three basic parameters. The slope angle varied from 70 to 88 degrees, which are the most critical values for slope angles, and a total of 200 analyses were performed. τ, β and σ are correlated, and the correlations are provided in the results section. The results indicate that the correlations developed between the parameters have a very close relationship. The applicability of the developed equations is above 99%. These correlations are applicable in any type of soil slope stability analysis, where the value of shear strength and factor of safety is required with the variation of slope angle and shear stress.

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Angren coal pit Centralny landslide slope stability analysis based on a three-dimensional geological-geophysical model

Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal ◽

10.21440/0536-1028-2020-3-39-49 ◽

2020 ◽

pp. 39-49

Author(s):

Mikhail Karablin ◽

◽

Sergei Prostov ◽

Keyword(s):

Rock Mass ◽

Stability Analysis ◽

Slope Stability ◽

Water Saturation ◽

Three Dimensional ◽

Friction Angle ◽

Slope Stability Analysis ◽

Geophysical Model ◽

Landslide Stability ◽

Adjacent Rock

Introduction. In the course of mining mineral deposits by opencast, natural stress state of adjacent rock mass changes giving rise to geomechanical processes which lead to pit slopes deformation. It can be prevented by mean of detecting landslide-hazardous zone by using three-dimensional geological-geophysical models based on the data bases from prospecting surveys and geophysical sounding of the adjacent rock. Research aim is to develop and evaluate basic provisions of the methods of forecasting slope stability based on three-dimensional geological-geophysical models which include the following information: the results of geophysical sounding (waterlogged zones boundaries); databases of exploration wells (physicalmechanical properties of soils in the zones of water saturation and natural moisture content, and the relief of the natural surfaces of weakness); design and actual position of mine workings. Methodology. In order to find the most hazardous section in the adjacent rock mass an algorithm of forecasting has been proposed and adjacent rock mass stability has been analyzed based on threedimensional geological-geophysical models. Results. A three-dimensional geological-geophysical model of Centralny landslide has been constructed as a result of analyzing geological survey databases, surveying instrumental observations over the deformations, and electrical sounding of the adjacent rock mass. Values of the friction angle and cohesion were found with using the inverse calculation method. Centralny landslide stability forecast has been analyzed as of the year of 2018 and after the final completion of the first stage of loading-out the front section in 2025. Summary. Developed an algorithm of slope stability analysis makes it possible to solve the task of finding the most hazardous section or landslide area by means of computer-based realization.

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