| Reinforced Earth is widely used because it is convenient, fast. Reinforced earth is the technology by laying geosynthetics or putting steel reinforcement materials into the geotechnical structures, in order to reduce pressure in the soil, increase slope stability, improve the bearing capacity and so on.At present the design of the reinforced earth is the ultimate method used balance method. Limit balance of simple, convenient, but due to the constitutive equation only meet the material, be the solution and close relationship between the size of the uncertainty. In principle, for the geotechnical stability of the structure of the analysis of the methods, such as the ceiling limit of law and lower limits of law, the finite element method and the slip-line method can be used for the reinforced soil structure stability analysis. The ceiling of law and the limits of the same balance of simple and materials to meet the constitutive relations, displacement of the compatibility conditions and boundary conditions, are the size of the solution and close relations between the clear, at the same time, from the analytical solution to the form Given. It can be said that the ceiling method is a simple and effective way.In this paper, collate and sum up the limit in the ceiling of reinforced earth structures in the application of the stability of the two ideas, and are referred to as internal forces exercises and associate cohesion law. Internal force exercises aimed at containing gluten build the sliding surface internal forces Gong method of calculation, the prospective law cohesion of sand will be reinforced as a cohesive force in the territories, the direct application of the ceiling method. At present, the internal force exercises application of the ceiling limits are based on the traditional method. Solution of the traditional limits of the ceiling in that movement to speed V and rigid body into geostationaryνKok expansion, dilatancy Kokνand internal friction angleφequivalent, resulting in the calculation of the amount of soil internal forces at work can not reflect the friction characteristics. Generalized plastic theory is that static and rigid body movements between the dilatancy angleφ/ 2, so as to work in the calculation of internal forces can clearly reflects the friction of rock and soil. This article concluded by the internal forces of the current work on the basis of law, will be based on the theory of generalized plastic cap law applied to the calculation of Yang Junjie Gong internal forces and internal forces to work formula, and then, by solving the critical high reinforced slopes, compared Based on the traditional theory of plastic and generalized approach Yang Junjie, Radoslaw LM methods of calculation results and centrifugal test results. Cohesive force for the prospective law, the paper of Liu Yuan of weeping reinforced sand and clay reinforced the triaxial test the results of the comparison tests are the cohesive force and cohesion through the quasi-calculated by the principle of cohesion , Had a quasi-cohesion principle can also be used for clay structures reinforced the conclusions and, through example was verified.This study has enriched and developed the reinforced earth theory. |
