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The slope stability analysis and support structure design of temporary roads are particularly important for the normal traffic of roads and the safe construction of underground structures. In this paper, FLAC3D software is used to study the numerical simulation of steel pipe piles support structure of the slope of temporary road by using the equivalent stiffness method. It is shown that under the action of road load, the normal stress of steel pipe pile has a peak value at 1.0m above the bottom of foundation pit, and the shear stress has two peaks at 1.0m above the bottom of foundation pit and 0.5m above the pile tip, which decrease at the pile tip. The horizontal displacement of the pile occurs at different depth, the displacement of the pile top is the largest, and the displacement from the pile top to the bottom of foundation pit decreases nonlinearly, and the horizontal displacement of the pile below the bottom of foundation pit is very small and remains unchanged. The vertical displacement of the pile increases gradually from the pile top to the pile tip, which results in tensile deformation of the pile. Stress concentration occurs at the temporary road position in the slope, and obvious horizontal displacement and vertical displacement which have obvious differences in different positions appear in the slope. The arrangement of piles can ensure the stability of the slope and there will be no overall shear failure surface. [ABSTRACT FROM AUTHOR]

The paper describes the recent devastating landslide of Kotrupi, Himachal Pradesh in India which had claimed many human lives and properties along its course on 13 August 2017. This event was the third reactivation of the slide as per data available. The study for this landslide involves a preliminary investigation of the site and comparison of pre- and post-event slope stability analysis. Other than rainfall, the combined effect of differential weathering rate of the debris and soil layers, low material strength, and the presence of a fault zone was found to be the primary cause of instability. The analysis was carried out with the geotechnical investigation and numerical modeling with the help of finite element model-based Phase 2 simulator. The significant findings of this paper include numerical simulation of pre- and post-event slide as stated under unsaturated and saturated condition. The study finds a low factor of safety of the present slope. The unstable condition of the slope may trigger another event of the same intensity shortly. [ABSTRACT FROM AUTHOR]

Detailed surface topography is important when analyzing the stability of slopes. Recent advances in new technologies such as interferometric synthetic aperture radar and light detection and ranging have allowed us to obtain high-precision profiles of distant landscapes and objects including detailed slope information for three-dimensional (3D) slope stability analysis. However, techniques of reconstructing 3D numerical models from scanned data of slope geometry have not been well investigated or tested. This paper proposes a comprehensive approach that integrates laser scanning and finite element method for slope stability analysis, particularly failure prediction under precipitation scenarios. The methodology is applied to a slope in the Wenchuan earthquake-stricken mountainous region that failed in 2013, triggered by severe rainfall. The modelling results show that the surface sampling resolution can affect the prediction accuracy of the potential failure zones. When constructing the slope model, the selected surface grid should be fine enough to capture the important topographic features of the slope while minimizing computation demand. This paper confirms that the proposed method can be successfully used to identify the potential failure zones of the investigated slope under severe rainfall conditions. [ABSTRACT FROM AUTHOR]

The optimization design of the open pit slope can ensure safety in production at the same time bring considerable economic benefits, so it is necessary to evaluate the stability of the initial excavation scheme of the high slope in an open-pit mine and optimize the initial slope angle according to the evaluation results. In this paper, an exhaustive study of Anyi open-pit mine in mouding County Yunnan province China has been made, and the following results have been achieved: (1)Confirmed the geological factors which affected the slope stability of open-pit mine; (2)Quantified the stability of the open-pit mine slope; (3) Under the premise of safety, the angle of the open pit high slope has been optimized on the base of the calculations of the open-pit mine high slope stability so as to ensure the maximum economic benefit. In this paper, the study area was divided into six zones. Firstly, qualitative analysis of slope stability was made by analogy method of engineering geology and stereographic projection method according to the orebody location, the properties of rock and soil in slope, the height of slope, and so on. The analysis shows that the preliminary design of slope angle is so large to ensure safety. Secondly, the stability of different slopes of a high slope is the quantitative analysis of different zones in high slope was made by two-dimensional limit equilibrium method and the finite difference method. In this paper, the mechanical parameters of rock are obtained by a laboratory test, and the stability of the high slope is quantitatively analyzed by two-dimensional limit equilibrium and three-dimensional numerical simulation. • Confirmed the geological factors which affected the slope stability. • Quantified the stability of the open-pit mine slope. • Under the premise of safety, the angle of the open pit high slope. • The preliminary design of slope angle is so large to ensure safety. [ABSTRACT FROM AUTHOR]

Abstract: The integration of the Geographic Information System (GIS) and the numerical simulation for slope stability analysis is investigated in this paper. The powerful spatial analysis functions of GIS such as automatic profile generation and gridding of the digital elevation model (DEM) are used in the preliminary treatment of numerical modeling, and a program for transforming GIS data to a commercial finite difference code FLAC has been developed using FLAC''s built-in programming language, FISH. At last, for demonstrating the reliability of this technique, the stability analysis of Xuecheng slope in 2D and 3D is performed and discussed. The preprocessing of data using GIS software for slope numerical simulation leads to saving time and money besides providing the real world data for use in numerical modeling. [Copyright &y& Elsevier]