Based on the basic concept of Plandell's assumption,the plasticity balance principle is applied to analyze the bearing capacity of the two-layer foundation,and the formula of bearing capacity of the two-layer foun...Based on the basic concept of Plandell's assumption,the plasticity balance principle is applied to analyze the bearing capacity of the two-layer foundation,and the formula of bearing capacity of the two-layer foundation is obtained.The variation of bearing capacity of the foundation under different soil conditions is analyzed,and different calculation parameters are obtained.The effect on the ultimate bearing capacity of the two-layer foundation.The study found that:(1)For homogeneous soils,the formula obtained in this paper is the same as the Plandell formula;(2)the cohesive force of the soil,the soil bulk density above the foundation,and the aspect ratio have less influence on the bearing capacity of the foundation than the internal friction angle.Much;(3)The upper and lower layers of different strength ratios have different critical depths and increase with the increase of the relative strength of the upper layers.(4)This paper assumes that the foundation is completely smooth and ignores the influence of the bulk density of the foundation soil,which is not consistent with sand.展开更多
Questionnaires are frequently used in social science studies.However,traditional questionnaires failed to effectively contribute to the targeted goals of question phases or overall evaluation.This study researched an ...Questionnaires are frequently used in social science studies.However,traditional questionnaires failed to effectively contribute to the targeted goals of question phases or overall evaluation.This study researched an investigation method termed the correlation questionnaire.The questionnaire was divided into three levels:the phase level,the question level and the performance level.The analysis results showed that the correlation questionnaire provides an overall performance effectiveness evaluation and comparative assessment for an individual program.In addition,when weighting values were added to the phase level,in accordance with the effective degree to questionnaire goal,they can effectively reflect the performance of the questionnaire goal.展开更多
This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D ...This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D DDA is rare according to literature review especially in practical 3D slopes.The function of bolt reinforcement has been fulfilled in the 2D DDA,while it has not been realized and applied in practical engineering in the 3D DDA.For the practical engineering problem,obviously,the 3D analysis is more accurate.Therefore,to fulfil the function of bolt reinforcement and application in practical engineering is still a problem for the 3D DDA.In this research,firstly,some basic theory about the 3D DDA method and the CRLD(Constant Resistance and Large Deformation)bolt model will be illustrated.Secondly,how to add the function of bolt reinforcement to the 3D DDA is illustrated,and then a simple test mode is used to test its accuracy.Lastly,a slope model is used as an example to verify its usage in engineering.In this paper,the process of adding bolt function in the 3D DDA is illustrated and the verification in slope is made,which benefits the future development of 3D DDA in landslide mitigation.展开更多
文摘Based on the basic concept of Plandell's assumption,the plasticity balance principle is applied to analyze the bearing capacity of the two-layer foundation,and the formula of bearing capacity of the two-layer foundation is obtained.The variation of bearing capacity of the foundation under different soil conditions is analyzed,and different calculation parameters are obtained.The effect on the ultimate bearing capacity of the two-layer foundation.The study found that:(1)For homogeneous soils,the formula obtained in this paper is the same as the Plandell formula;(2)the cohesive force of the soil,the soil bulk density above the foundation,and the aspect ratio have less influence on the bearing capacity of the foundation than the internal friction angle.Much;(3)The upper and lower layers of different strength ratios have different critical depths and increase with the increase of the relative strength of the upper layers.(4)This paper assumes that the foundation is completely smooth and ignores the influence of the bulk density of the foundation soil,which is not consistent with sand.
文摘Questionnaires are frequently used in social science studies.However,traditional questionnaires failed to effectively contribute to the targeted goals of question phases or overall evaluation.This study researched an investigation method termed the correlation questionnaire.The questionnaire was divided into three levels:the phase level,the question level and the performance level.The analysis results showed that the correlation questionnaire provides an overall performance effectiveness evaluation and comparative assessment for an individual program.In addition,when weighting values were added to the phase level,in accordance with the effective degree to questionnaire goal,they can effectively reflect the performance of the questionnaire goal.
文摘This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D DDA is rare according to literature review especially in practical 3D slopes.The function of bolt reinforcement has been fulfilled in the 2D DDA,while it has not been realized and applied in practical engineering in the 3D DDA.For the practical engineering problem,obviously,the 3D analysis is more accurate.Therefore,to fulfil the function of bolt reinforcement and application in practical engineering is still a problem for the 3D DDA.In this research,firstly,some basic theory about the 3D DDA method and the CRLD(Constant Resistance and Large Deformation)bolt model will be illustrated.Secondly,how to add the function of bolt reinforcement to the 3D DDA is illustrated,and then a simple test mode is used to test its accuracy.Lastly,a slope model is used as an example to verify its usage in engineering.In this paper,the process of adding bolt function in the 3D DDA is illustrated and the verification in slope is made,which benefits the future development of 3D DDA in landslide mitigation.
