| This paper research for heightening and strengthening project of the Yuankou arch dam,using ANSYS numerical mouth software for 3D finite element analysis of structural stress and stability,comparative analysis of four cases dam stress and displacement results that contain the one-time arch dam built,pre-built arch dam,heightening and constructing arch dam and one-time arch dam built including broken fault zone with the foundation and so on.On this basis,lt is given a new foundation strengthening programme.In addition,the paper also review the stress of the arch dam setting by arch beam method.Finally,respectively calculate the against sliding stability and the foundation stress of the left and the right bank of the retaining wall structure.The research results of Yuankou arch dam heightening show that:after arch dam heightening and constructing,the dam stress meet strength requirements, and arch-face meet against sliding stability requirements; Compared to the situation of completing the arch dam a one-time,after arch dam heightening and constructing,the stress of abutment in the combination surface of old and new dam is large relatively,but displacement value small relatively.Broken fault zone have little effect on stress and displacement of arch dam,but have a greater impact on the stability of abutment.The research results of Yuankou arch dam reinforcement show that:the new foundation strengthening programme is feasible,and strengthening has good effect;The structural design of retaining wall is feasible to meet the requirements of strength and stability;The arch dam temperature stress,in particular the temperature stress of the construction period,is a large proportion in the body of stress.So it showed be given adequate attention.Above the study results provide a scientific basis for heightening and strengthening project building of Yuankou arch dam,and also provide meaningful information and reference for the construction of similar projects. |
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