The Experts below are selected from a list of 17271 Experts worldwide ranked by ideXlab platform
Laura M. Caldeira - One of the best experts on this subject based on the ideXlab platform.
-
Limit Equilibrium Analyses for Internal Design of Geosynthetic Reinforced Slopes: Influence of Potential Failure Surface and Strength Distribution
Geotechnical and Geological Engineering, 2013Co-Authors: Castorina Silva Vieira, Maria De Lurdes Lopes, Laura M. CaldeiraAbstract:The paper presents results from a computer code, based on limit equilibrium analyses, able to quantify earth pressure coefficients for the internal design of geosynthetic reinforced soil structures and identify the Potential Failure Surfaces. Failure mechanisms assuming bilinear or logarithmic spiral Failure Surfaces are considered. The influence of the Potential Failure Surface and geosynthetic strength distribution on the earth pressure coefficient is analysed. Required reinforcement tensile strengths calculated by the developed program are compared with values published in the literature. To further evaluate the capabilities of limit equilibrium analyses, the numerical modelling of a geosynthetic reinforced steep slope, designed at ultimate limit state conditions (FS = 1), is also presented. Good agreement was achieved between the Potential Failure Surfaces predicted by limit equilibrium analyses and those obtained with numerical modelling.
Chunhai Wang - One of the best experts on this subject based on the ideXlab platform.
-
earth pressure coefficients for reinforcement loads of vertical geosynthetic reinforced soil retaining walls under working stress conditions
Geotextiles and Geomembranes, 2018Co-Authors: Lei Wang, Chunhai WangAbstract:Abstract Based on the nonlinear elastic theory and stress-dilatancy theory, two earth pressure coefficients were proposed to analyze the reinforcement loads at the Potential Failure Surface of vertical geosynthetic-reinforced soil retaining walls under working stress conditions. The earth pressure coefficients take into account the force equilibrium and compatible deformations between soil and reinforcement, and can be obtained by solving two implicit functions by an iterative or graphic method. The effects of backfill compaction and facing restriction are taken into account in the earth pressure coefficients by two additional stress factors, which have been derived analytically using straightforward approaches. To validate the effectiveness of the proposed methods, comparisons were made with the results from large scale tests and numerical simulations. It was demonstrated that the reinforcement loads predicted by the proposed methods were in good agreement with the experimental or numerical results.
Jiaguo Xia - One of the best experts on this subject based on the ideXlab platform.
-
microtremor survey and stability analysis of a soil rock mixture landslide a case study in baidian town china
Landslides, 2018Co-Authors: Wenwei Gao, Wei Gao, Jiaguo XiaAbstract:Soil-rock mixtures (S-RM) are widely distributed in mountainous regions, and there are different genetic types and scales of S-RM slopes. The stability of these slopes is very important for slope safety during the construction and operation of engineering projects. Since the mechanical properties of an S-RM are mainly dominated by its random component, accurately investigating the structure of an S-RM slope is the fundamental basis for evaluating the mechanism of a landslide. In this paper, in situ direct shear tests are used to obtain the “soil” strength parameters of the S-RM, the microtremor survey method (MSM) is introduced to detect the S-RM slope and the numerical method of FEM is utilised to simulate the Failure characteristics and stability of the S-RM slope. Based on the MSM, the strata structure and proportions of solitary rock blocks in the S-RM slope are investigated, and three possible models of the S-RM slope are established. By using the strength reduction method in numerical simulations, the Potential Failure Surface and stability of a slope of homogeneous soil and that with solitary rock blocks are discussed. The study results show that the MSM is an effective method to estimate the proportion of rock blocks in the S-RM slope. The presence of solitary rock blocks makes the slope Potential slide Surface complicated. The factor of safety of the S-RM slope is higher than that of the homogeneous soil slope, the rock blocks at the toe of the slope are favourable for slope stability and the rock blocks near the Surface of the slope squeeze the lower soil and improve the safety factor of the slope.
Castorina Silva Vieira - One of the best experts on this subject based on the ideXlab platform.
-
Limit Equilibrium Analyses for Internal Design of Geosynthetic Reinforced Slopes: Influence of Potential Failure Surface and Strength Distribution
Geotechnical and Geological Engineering, 2013Co-Authors: Castorina Silva Vieira, Maria De Lurdes Lopes, Laura M. CaldeiraAbstract:The paper presents results from a computer code, based on limit equilibrium analyses, able to quantify earth pressure coefficients for the internal design of geosynthetic reinforced soil structures and identify the Potential Failure Surfaces. Failure mechanisms assuming bilinear or logarithmic spiral Failure Surfaces are considered. The influence of the Potential Failure Surface and geosynthetic strength distribution on the earth pressure coefficient is analysed. Required reinforcement tensile strengths calculated by the developed program are compared with values published in the literature. To further evaluate the capabilities of limit equilibrium analyses, the numerical modelling of a geosynthetic reinforced steep slope, designed at ultimate limit state conditions (FS = 1), is also presented. Good agreement was achieved between the Potential Failure Surfaces predicted by limit equilibrium analyses and those obtained with numerical modelling.
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
-
earth pressure coefficients for reinforcement loads of vertical geosynthetic reinforced soil retaining walls under working stress conditions
Geotextiles and Geomembranes, 2018Co-Authors: Lei Wang, Chunhai WangAbstract:Abstract Based on the nonlinear elastic theory and stress-dilatancy theory, two earth pressure coefficients were proposed to analyze the reinforcement loads at the Potential Failure Surface of vertical geosynthetic-reinforced soil retaining walls under working stress conditions. The earth pressure coefficients take into account the force equilibrium and compatible deformations between soil and reinforcement, and can be obtained by solving two implicit functions by an iterative or graphic method. The effects of backfill compaction and facing restriction are taken into account in the earth pressure coefficients by two additional stress factors, which have been derived analytically using straightforward approaches. To validate the effectiveness of the proposed methods, comparisons were made with the results from large scale tests and numerical simulations. It was demonstrated that the reinforcement loads predicted by the proposed methods were in good agreement with the experimental or numerical results.