The Multi-span Long Span Pc Continuous Girder Bridge Construction Control The Un General Assembly Research And Practice

With the Cantilever method, the internal force and form of the multi-span PC continuous beam bridges will change when beam going ahead, beam shutting, backout of the temporary joint and system conversion. The bridge construction control is very important to make sure the form and shutting precision of the bridge meet the request and the form can reach the prospective devisal level some years later.This paper with the great GongJiang bridge in the JiangXi province GanZhou City for engineering background, build the bridge model and analyses the bridge’s constructional process with the FEM software Midas/Civil. at the same time set down the construction control scheme and steps of the great GongJiang bridge. This paper mainly has the conclusion and content as follows:1、Set down the construction control scheme and steps of the great GongJiang bridge. Obtain well purpose.2、Calculates the stress of the mufti-span PC continuous beam bridge under the cantilever stage and compare the calculate date with the survey data to make sure the bridge mode is right. At the same time calculates the accumulating displacements in three years of the bridge to provide the theoretical level of the bridge.3、Discuss the effect of the shrinkage and creep to the internal force and form of the multi-span PC continuous beam bridges and come out that the effect of the long year’s shrinkage and creep to the multi-span PC continuous beam bridges is big especially to the vertical displacement of the middle of the bridge.4、This paper analyses the factors which affect the testing stress data, and modify the data to anastomose the theoretical data.