Research On Optimization Design Of U-shaped Abutment

With the deepening of reform and opening up, a wide variety of problems also appear frequently in engineering at the same time, In order to solve the problems above, designer of abutment need to apply new materials rationally for better design. Thus, the abutment can better adapted to the terrain, reduce a great amount of excavation and masonry which can save lot of resource and costs for our country.Advanced three-dimensional finite element analysis software is used to study the mechanism between the abutment and backfills, seeking for optimum design of U-shape abutment. The following aspects are analyzed in this paper:(1) Four kind of soils(normal soil, light-weight foaming soil, lime soil and EPS) are employed as backfills of abutment respectively to analyze by the advanced three-dimensional finite element analysis software in order to find an approximately distribution law of stress and deformation of the U-shaped abutment under stress.(2) Different distribution of stress and deformation of U-shape abutment are observed in the process of analyzing by finite element analysis software due to different properties of four kinds of soil. Among them, light-weight foaming soil as the backfills can achieve the smallest horizontal and vertical deformation, and reduce the problems of abutment bump.(3) The influence on light-type U-shaped abutment and gravity-type U-shaped abutment can be different analyzed by advanced three-dimensional finite element analysis software when using light-weight foaming soil as the abutment backfills. It is showed that the light-type U-shape abutment has a more desirable deformation with a smaller masonry amount than gravity-type U-shaped abutment. The construction of light-type U-shape abutment can be uncomplicated at the same time, it provides a good idea to the designers to optimize the gravity-type U-shaped abutment.