FINITE ELEMENT ANALYSIS ON MECHANICAL PROPERTIES OF NEW SUBGRADE STRUCTURE WITH U-CANTILEVER TYPE

摘要

Using software ANSYS, the finite element computation for new subgrade structure with U-canti lever type is performed. The paper study the law of sidewall thickness and height to displacement and internal force of new subgrade structure with U-cantilever type, and it provides evidence for field test and application research. The results show that: (l)The thickness of new subgrade structure with U-cantilever type is one of the most important factors which affect the displacement and moment of new subgrade structure with U-cantilever type. With increasing sidewall thickness, the x-direction displacement and moment of new subgrade structure with U-cantilever type were decreased. The sidewall thickness is selected by technical index and economic index; (2) The height of new subgrade structure with Ucantilever type had significant effect on the displacement and moment of new subgrade structure with U-cantilever type. With increase of the sidewall height, the jc-direction displacement and moment of new subgrade structure with U-cantilever type are growing. When the sidewall height of new subgrade structure with U-cantilever type is higher than 5 m, it should have lacing wire to control the displacement and moment. Therefore, the new subgrade structure with U-cantilever type is a subgrade structure with technical feasibility and economic rationality.