Adjustable Multi-stories Relieving Plate Assembly Retaining Wall Numerical Simulation Analysis

In order to improve thebearing performance of retaining walls and reduce the active earth pressure,this thesis puts forward a concept of a new type of retaining wall,which is adjustable multi-stories relieving plate assembly retaining wall.Due to the multi segments of the sliding soil wedgeback of the walls divided by relieving plates,the filling critical slip surface has transformed so as to fail to calculate its soil pressure based on the traditional soil pressure theory.In addition,the evaluation of performance of the retaining walls with relieving plates and the calculation methods of soil pressure have not been effective enough yet at the present moment.On the basis of current research outcomes,this thesis will firstly discuss how to upgrade the normal single-layer relieving plate to customized multi-layer one through a series of optimization design;secondly,in accordance with the existing soil pressure calculation theory,this thesis will try to establish a mathematical model to theoretically calculate the soil pressure of the length-adjustable and multi-layer assembly retaining walls;thirdly,this thesis will adopt the finite element software to simulate the numerical models of retaining walls with different relieving plates,and analyze and discuss the impact to retaining walls exerted by relieving plates.At the consideration of the tremendous range of this technology research,this thesis will merely focus on the following aspects:(1)To propose “the assembly retaining wall equipped with adjustable and multi-layer relieving plate” and apply for a patent for invention.(2)In accordance with the coulomb soil pressure theory and the limit equilibrium method,to present the theoretical calculation method to compute the soil pressure of the retaining wall equipped with adjustable and multi-layer relieving plate,and applied to the relieving plates with differential length,in hope of providing a reference for the study of the theory of the reduced pressure plate.(3)To put forward with the theoretical calculation method to compute the stability performance of the assembly retaining wall equipped with adjustable and multi-layer relieving plate,and,in light of the numerical simulation theory,to analyze the transformation of stability according to different lengths.(4)This proposed design not only tremendously simplifies the traditionally complicated relieving plate embodied within the retaining wall,but also demonstrates the customized multi-layer relieving plate in line with different slope height so as to greatly reduce the soil pressure of retainingstructure.So through comprehensive analysis this thesis will come to conclusion that the soil pressure computed by the theoretical calculation method of the retaining wall equipped with adjustable and multi-layer relieving plate is less than that by the limit equilibrium method,regardless of its displacement effect and other hypothetical factors,and both are less than that of the traditional gravity retaining wallunder the same circumstance.In limit equilibrium method analysis,in consideration of the relieving plate and the back wall friction and deflection,soil pressure under longrelieving plate is not zero.With the advantages of effectively reducing pressure of the retaining wall under it by the upper parts,the relieving plate will significantly improve the bearing performance of retaining wall by reducing its soil pressure and enhancing its stability performance.To sum up,the assembly retaining wall equipped with adjustable and multi-layer relieving plate,assembled many advantages of existing other new types,is an optimized one with enormous social potential and competitiveness.And the above research outcomes,providing a theoretical basis to the design of this new retaining wall,are of certain value of design.