The reinforcement effects of geosynthetics in thick soft subsoil case and thin soft subsoil case are studied in this paper,and a Duncan Chang nonlinear numerical model based on the finite element method (FEM) is deve...The reinforcement effects of geosynthetics in thick soft subsoil case and thin soft subsoil case are studied in this paper,and a Duncan Chang nonlinear numerical model based on the finite element method (FEM) is developed.Moreover,an important conclusion that the thickness of soft subsoil affects greatly the geotechnical behavior of geosynthetic reinforced embankments is drawn.A series of embankment built on soft subsoil is calculated using the FEM program.The results of the computer program,such as the lateral displacements,settlements,and stress level and shear stresses in the subsoil,are presented in great detail and the comparison of those results disposes clearly the huge discrepancy of reinforce benefit between the thick subsoil embankment and thin subsoil embankment.Reinforcement mechanism of geosynthetics is also discussed in this paper and several conclusions are reached.This paper also gives recommendations for design.展开更多
The effect of geosynthetic reinforcing on bearing capacity of a strip footing resting on georeinforced clayey slopes was investigated.The results of a series of numerical study using finite element analyses on strip f...The effect of geosynthetic reinforcing on bearing capacity of a strip footing resting on georeinforced clayey slopes was investigated.The results of a series of numerical study using finite element analyses on strip footing upon both reinforced and unreinforced clayey slopes were presented.The objectives of this work are to:1) determine the influence of reinforcement on the bearing-capacity of the strip footings adjacent slopes,2) suggest an optimum number of reinforcement and 3) survey the effect of friction angle in clayey soils reinforced by geogrids.The investigations were carried out by varying the edge distance of the footing from slope.Also different numbers of geosynthetic layers were applied to obtaining the maximum bearing capacity and minimum settlement.To achieve the third objective,two different friction angles were used.The results show that the load?settlement behavior and ultimate bearing capacity of footing can be considerably improved by the inclusion of reinforcing layer.But using more than one layer reinforcement,the ultimate bearing capacity does not change considerably.It is also shown that for both reinforced and unreinforced slopes,the bearing capacity increases with an increase in edge distance.In addition,as the soil friction angle is increased,the efficiency of reinforcing reduces.展开更多
This paper is concerned with the stability analysis of reinforced slopes.A new approach based on the limit equilibrium principle is proposed to evaluate the stability of the reinforced slopes.The effect of reinforceme...This paper is concerned with the stability analysis of reinforced slopes.A new approach based on the limit equilibrium principle is proposed to evaluate the stability of the reinforced slopes.The effect of reinforcement is modeled as an equivalent restoring force acting the bottom of the slice and added into the general limit equilibrium(GLE) method.The equations of force and moment equilibrium of the slice are derived and corresponding iterative solution methods are provided.The new method can satisfy both the force and the moment equilibrium and be applicable to the critical failure surface of arbitrary form.Furthermore,the results predicted by the proposed method are compared with the calculation examples of other researchers and the centrifuge model test results to validate its correctness and effectiveness.展开更多
Rural industry provides an important basis for rural revitalization, and its development can promote urban-rural integration. Rural China has long had complex and diverse rural industries whose existence and developme...Rural industry provides an important basis for rural revitalization, and its development can promote urban-rural integration. Rural China has long had complex and diverse rural industries whose existence and development is founded on rural society. Complex and varied rural industries have long existed in rural China, where local society provides the social foundation for their existence and development. One example is the processing of supplied materials or putting-out system(lailiao jiagong 来料加工) in remote rural areas under the jurisdiction of City L, Zhejiang. In recent years, industries in the developed areas of Zhejiang have expanded to remote villages through processing to order, driving the growth of rural industries in remote areas. The processing of supplied materials is a link in the global production chain. Flexible decentralized processing links surplus rural labor in remote areas to the vast global market. The industry’s production process is deeply embedded in local society;interpersonal relationships and social ethics facilitate production management, forming a social foundation for the development of rural industry. Social ethics in these areas takes the particular operational form of sensitive cultivation of personal relationships or 'human feelings.' The processing of supplied materials has shaped the distinctive character of rural development and provides a route for social transformation. To implement the strategy of rural revitalization, besides provision of land, finance and industrial policy, China needs to handle the social foundation of rural areas rationally, make full use of rural social resources and stimulate endogenous motivation in rural society.展开更多
文摘The reinforcement effects of geosynthetics in thick soft subsoil case and thin soft subsoil case are studied in this paper,and a Duncan Chang nonlinear numerical model based on the finite element method (FEM) is developed.Moreover,an important conclusion that the thickness of soft subsoil affects greatly the geotechnical behavior of geosynthetic reinforced embankments is drawn.A series of embankment built on soft subsoil is calculated using the FEM program.The results of the computer program,such as the lateral displacements,settlements,and stress level and shear stresses in the subsoil,are presented in great detail and the comparison of those results disposes clearly the huge discrepancy of reinforce benefit between the thick subsoil embankment and thin subsoil embankment.Reinforcement mechanism of geosynthetics is also discussed in this paper and several conclusions are reached.This paper also gives recommendations for design.
文摘The effect of geosynthetic reinforcing on bearing capacity of a strip footing resting on georeinforced clayey slopes was investigated.The results of a series of numerical study using finite element analyses on strip footing upon both reinforced and unreinforced clayey slopes were presented.The objectives of this work are to:1) determine the influence of reinforcement on the bearing-capacity of the strip footings adjacent slopes,2) suggest an optimum number of reinforcement and 3) survey the effect of friction angle in clayey soils reinforced by geogrids.The investigations were carried out by varying the edge distance of the footing from slope.Also different numbers of geosynthetic layers were applied to obtaining the maximum bearing capacity and minimum settlement.To achieve the third objective,two different friction angles were used.The results show that the load?settlement behavior and ultimate bearing capacity of footing can be considerably improved by the inclusion of reinforcing layer.But using more than one layer reinforcement,the ultimate bearing capacity does not change considerably.It is also shown that for both reinforced and unreinforced slopes,the bearing capacity increases with an increase in edge distance.In addition,as the soil friction angle is increased,the efficiency of reinforcing reduces.
基金funded by the Key Industrial Science and Technology Project of Shaanxi Province(No.2015GY149)the Scientific Project funded by the Ministry of Housing and Urban-Rural Development of the People’s Republic of China Council(No.2015-K2-008)
文摘This paper is concerned with the stability analysis of reinforced slopes.A new approach based on the limit equilibrium principle is proposed to evaluate the stability of the reinforced slopes.The effect of reinforcement is modeled as an equivalent restoring force acting the bottom of the slice and added into the general limit equilibrium(GLE) method.The equations of force and moment equilibrium of the slice are derived and corresponding iterative solution methods are provided.The new method can satisfy both the force and the moment equilibrium and be applicable to the critical failure surface of arbitrary form.Furthermore,the results predicted by the proposed method are compared with the calculation examples of other researchers and the centrifuge model test results to validate its correctness and effectiveness.
文摘Rural industry provides an important basis for rural revitalization, and its development can promote urban-rural integration. Rural China has long had complex and diverse rural industries whose existence and development is founded on rural society. Complex and varied rural industries have long existed in rural China, where local society provides the social foundation for their existence and development. One example is the processing of supplied materials or putting-out system(lailiao jiagong 来料加工) in remote rural areas under the jurisdiction of City L, Zhejiang. In recent years, industries in the developed areas of Zhejiang have expanded to remote villages through processing to order, driving the growth of rural industries in remote areas. The processing of supplied materials is a link in the global production chain. Flexible decentralized processing links surplus rural labor in remote areas to the vast global market. The industry’s production process is deeply embedded in local society;interpersonal relationships and social ethics facilitate production management, forming a social foundation for the development of rural industry. Social ethics in these areas takes the particular operational form of sensitive cultivation of personal relationships or 'human feelings.' The processing of supplied materials has shaped the distinctive character of rural development and provides a route for social transformation. To implement the strategy of rural revitalization, besides provision of land, finance and industrial policy, China needs to handle the social foundation of rural areas rationally, make full use of rural social resources and stimulate endogenous motivation in rural society.
