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Добірка наукової літератури з теми "Slopes (Soil mechanics) Stability Computer programs"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Slopes (Soil mechanics) Stability Computer programs"

Hosseini, Mojtaba, Peyman Beiranvand, Mohammad Mohammadiasl, and Ashkan Hasanvand. "INFLUENCE OF SURFACE CRACKS ON THE STABILITY OF CRACKED SOIL SLOPE." International Journal for Computational Civil and Structural Engineering 18, no. 4 (December 28, 2022): 82–90. http://dx.doi.org/10.22337/2587-9618-2022-18-4-82-90.

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Анотація:

The slope stability is a major concern to geotechnical engineers. Traditional methods of slope stability analysis have potentially ignored the influence of surface cracks. It is also known that seasonal rainfall and seepage through crack are closely related with slope failure. First, surface cracks provide special flow channels which increase the soil permeability and decrease the soil strength. Second, water-filled cracks apply an additional active force on the slope. Finally, cracks can create a part of the critical failure surface that has no shear strength. The objective of this paper is to investigate the influence of existing cracks on the stability of a cracked soil slope in different state. The effects of crack depth, slope angle and water-filled cracks on the stability of the cracked slope are explored. The analysis was conducted using the computer modelling programs Optum G2 to analysis of slope factor of safety. The results show that with increasing of slope angle the factor of safety decreases and this problem is significant in the slope with water filled cracks. Also, Factor of safety for all of slope angles in Dry and water filled cracks states with increasing the crack depth, decrease significantly.

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Khattab, Suhail A. A., Bayer J. Al-Sulaifanie, and Rabi' A. Mohammed. "Design Chart of a footing located on a Crest of the Unsaturated Soil slopes." Academic Journal of Nawroz University 8, no. 4 (November 6, 2019): 198. http://dx.doi.org/10.25007/ajnu.v8n4a463.

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A parametric study points out the effect of various influential parameters on the stability of the unsaturated clayey and alluvial soil slopes using finite element computer programs of GEOSLOPE. The rainfall intensity and duration is considered as one of the studied parameters, three intensity values are selected (10, 24 and 50) mm/day (with different duration 10, 20, 30, 40, 50 and 60) day. Phreatic line level is the second parameter studied, at 2, 4, and 6m from surface. In addition to that, footing width is studied as the third parameter. Consequently, three different widths are selected (1, 2, and 3m). Slope angle is also selected as the fourth parameters; four different angles are selected (31, 45, 63 and 81) degree. As a result, a chart for routine design is obtained.

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Mburu, Joram Wachira, An-Jui Li, Horn-Da Lin, and Chih-Wei Lu. "Investigations of Unsaturated Slopes Subjected to Rainfall Infiltration Using Numerical Approaches—A Parametric Study and Comparative Review." Sustainability 14, no. 21 (November 3, 2022): 14465. http://dx.doi.org/10.3390/su142114465.

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In the past 30 years, research on rainfall-induced landslides has grown remarkably. The contribution of matric suction to soil strength and the physics of water flow in unsaturated soils are widely accepted phenomena among researchers. However, the adoption of unsaturated soil mechanics in geotechnical engineering practice has been relatively slow, in part due to the practicality of design solutions available to the engineer. This paper conducts a parametric study on unsaturated silty slopes under a vertical steady flow rate to identify the suitable slope and hydrologic conditions to incorporate unsaturated conditions for preliminary stability analysis. Notably, the contribution of suction is most significant for silt/clay slopes with a water table located below the mid-height of the slope. For slopes with slope height ≥20 m and a fairly high water table, the slope height is a primary controlling factor of slope stability. Two case studies based on distinct failure mechanisms are presented to review the application of common geotechnical software in rainfall seepage and stability analyses of unsaturated slopes. Focus is placed on the pre-failure and failure stages of each case study. The slip surface search method, failure mode, and coupling approach integrated into each computer program caused notable differences in output results.

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Hou, Hengjun, Zhengwei Zhu, Bo Wang, and Wenhao Zhou. "A Practical Model Study on the Mechanism of Clay Landslide under Static Loads: From the Perspective of Major Crack–Stress–Displacement." Applied Sciences 12, no. 7 (March 22, 2022): 3224. http://dx.doi.org/10.3390/app12073224.

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Анотація:

Stability assessment of cracked clay slopes has been a research hotspot in geotechnical engineering in recent years. The assessment work should include crack initiation/development and stability evaluation. However, there has been no universal method for predicting crack evolution until now. In addition, scholars have paid little attention to the coupling relationship between the evolution of cracks and the progressive failure process of macroscopic clay slopes and have seldom studied the ubiquitous diagonal cracks in clay slopes. In this work, the stress mechanism for initiation and development of major cracks was derived based on unsaturated soil mechanics and critical state soil mechanics considering the tensile, compression, and shear properties of clay. The correctness of the proposed theory was verified by constructing a large-scale, arc-shaped slip surface clay slope model. In the model test, earth pressure cells and displacement gauge were employed to monitor development of stresses within the clay slope and horizontal displacement of the slope shoulder, respectively, under the set load sequence. The results showed that the stress mechanism proposed in this paper could judge not only vertical cracks but also diagonal cracks. Horizontal stresses near the primary crack appeared as a result of stress saltation. The locations and depths of the major cracks could be determined by analyzing the differences in horizontal stress between adjacent measuring points under the same load step. The development of major crack–horizontal stress–displacement had intrinsic consistency, and the initiation and development of major cracks aggravated changes in displacement and horizontal stresses. The perspective of major crack–stress–displacement is helpful to wholly grasp the progressive failure process of cracked clay slopes and provide a reference for prediction of clay landslides.

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Poulos, Harry G. "Design of reinforcing piles to increase slope stability." Canadian Geotechnical Journal 32, no. 5 (October 1, 1995): 808–18. http://dx.doi.org/10.1139/t95-078.

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This paper describes an approach for the design of piles to reinforce slopes, involving three main steps: (1) evaluating the shear force needed to increase the safety factor to the desired value; (2) evaluating the maximum shear force that each pile can provide to resist sliding of the potentially unstable portion of the slope; and (3) selection of the type and number of piles, and the most suitable location of these piles within the slope. For step 1, stability analyses can be used to assess the required additional shear force for stability. Step 2 involves the use of a computer analysis for the response of a pile to laterally moving soil. This analysis can be implemented via a computer program ERCAP, and enables the resisting shear force developed by the piles to be evaluated as a function of pile diameter and flexibility and the relative depth of the soil movement in relation to the pile length. Step (3) involves the use of engineering judgement in conjunction with the analysis results from steps 1 and 2. The paper describes the ERCAP analysis and the characteristics of pile behaviour it reveals. The application of the approach to a highway bypass problem in Newcastle, Australia, is described in detail. In the final design, a total of 64 bored piles 1.2 m in diameter were used over a total length of slope cutting of about 250 m. The pile lengths ranged between 6 and 12 m, with the spacings varying between 3.2 and 6.0 m. Key words : analysis, boundary element, piles, soil–pile interaction, slope stabilization, soil mechanics.

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Wongchana, Pongsakorn, and Peerapong Jitsangiam. "Experimental Investigation and Modelling of Claystone from Mae Moh Coal Mine, Thailand." Key Engineering Materials 841 (May 2020): 155–60. http://dx.doi.org/10.4028/www.scientific.net/kem.841.155.

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Анотація:

The open pit mine is excavation soil from the Earth's surface, leading to presence of cut steep slopes with stability-concerned manners. Mae Moh open pit mine has the main component of claystone with ambiguous properties under stress condition changes from mine operations. Therefore, the strength of the claystone must be studied to be used for the slope stability analysis. Shear strength parameters for slope stability analysis were derived from the Triaxial Compression tests. Claystone is a type of sedimentary rock. Therefore, it is necessary to improve the equipment of the triaxial compression strength test to fit with intrinsic soft rock characteristics of the Mae Moh Claystone. Determination of parameters was based on Mohr Coulomb model, because it is the basis for slope stability analysis and can be resulted from the triaxial compression test. In addition, many computer-based programs for slope stability analysis also were relied onthe Mohr Coulomb model, including PLAXIS used in this study. Before the analysis, the model were validated by the function of “Simulation of Lab Test” in PLAXIS. Comparison on triaxial compression test results between the Mohr-Coulomb Model from PLAXIS and triaxial compression tests were made. This article reported the strength characteristics of Mae Moh claystone.

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Lai, Van Qui, Dang Khoa Nguyen, Rungkhun Banyong, and Suraparb Keawsawasvong. "Limit analysis solutions for stability factor of unsupported conical slopes in clays with heterogeneity and anisotropy." International Journal of Computational Materials Science and Engineering 11, no. 01 (December 9, 2021). http://dx.doi.org/10.1142/s2047684121500305.

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The novel stability solutions of unsupported conical slope in anisotropic and inhomogeneous clays utilizing the lower-bound (LB) and upper-bound (UB) finite-element limit analyses (FELA) are proposed in this paper. The anisotropic undrained shear (AUS) model and linear increasing undrained shear strength are employed to determine the anisotropic and inhomogeneous soil behavior, respectively. The stability factor [Formula: see text] is obtained with the variations of dimensionless parameters including the ratio of anisotropic ([Formula: see text], the rate of increasing undrained shear strength ([Formula: see text], the ratio between the height and the radius at the bottom slope ([Formula: see text]/[Formula: see text], and the inclination angle of slope ([Formula: see text] provided in sample charts. The failure patterns of conical slope considering the affected parameters are also obtained and described.

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Дисертації з теми "Slopes (Soil mechanics) Stability Computer programs"

Al-Karni, Awad 1962. "Application of the BFGS quasi-Newton method to slope stability analysis." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276994.

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Mana computer programs have been developed for solving slope stability problems. Since slope stability problems can be characterized as optimization problems, many optimization techniques can be used for searching for the lowest safety factor for a given problem and the corresponding critical slip surface. Most of the slope stability programs use the direct search method which requires only the function value (i.e., safety factor value). In this thesis, a new optimization technique, the Broyden (1970), Fletcher (1970), Goldfarb (1970), and Shanno (1970) (BFGS) quasi-Newton optimization method, is used in conjunction with the STABR program of Lefebvre (1971) to solve slope stability problems. This method of optimization requires the function value and the first derivative value, which can be found by the finite difference method. A new program CSLIP3, incorporating the BFGS technique, is used to solve a variety of realistic slope stability problems. It is determined that CSLIP3 is reliable and efficient.

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Weih, Robert C. "Evaluating methods for characterizing slope conditions within polygons." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06062008-171008/.

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Книги з теми "Slopes (Soil mechanics) Stability Computer programs"

Wilson, Joe. Evaluation of the GEOWEB and J.K. STRUCTURE slope stabilization methods. Madison, WI: The Unit, 2000.

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Carlson, E. J. Drainage from sloping land using oblique drains. Denver, Colo: Hydraulics Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S. Dept. of the Interior, Bureau of Reclamation, 1987.

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United States. Federal Highway Administration. Office of Infrastructure., ed. RSS, Reinforced Slope Stability: A microcomputer program : user's manual. [Washington, D.C.]: U.S. Dept. of Transportation, Federal Highway Administration, Office of Infrastructure, 1999.

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PETAL3: PEnetration Testing and Liquefaction, an interactive computer program. [Denver, Colo.?: U.S. Geological Survey, 1988.

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Geological Survey (U.S.), ed. PETAL3: PEnetration Testing and Liquefaction, an interactive computer program. [Denver, Colo.?: U.S. Geological Survey, 1988.

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Geological Survey (U.S.), ed. PETAL3: PEnetration Testing and Liquefaction, an interactive computer program. [Denver, Colo.?: U.S. Geological Survey, 1988.

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