The Critical Factor Analysis Of Rotation Construction Control For T-Shape Rigid Frame Bridge

The improvement of transportation in China has significant effects on economic progress and the standard of living. In order to effectively use the limited space, crossing the complex terrain (such as the valley,river)can not be avoided when we are doing the bridge construction. The technique of rotation construction provides a new method for the bridge construction in mountainous area,and also avoids blocking the transportation of existing line during bridge construction period. Considering its advantages, this technique now is wildly applied in bridge engineering.The thesis takes the T-shape rigid frame bridge of Jian River overpass in Taiyuan as the project background, in order to analyze the critical factor of rotation construction control for the T-shape rigid frame bridge. The research mainly includes:(1) The theory of the bridge construction control is briefly introduced, including the principles,methods,contents,the calculation of the structure and the influence factors.(2) T-shape rigid frame bridge is simulated and calculated by using the finite element software, doing the linear control and stress control on every construction stage reasonably.Then based on the analysis of the data of the linear control and stress control, the conclusion of the construction control is obtained.(3) Do the comparison of two different weighing test methods. By doing the T-shape rigid frame bridge weighing test,calculate the relative rotation parameters.(4)According to the static mechanical analysis of the rotation table system which is very critical to the rotation construction, the stress distribution and the displacement are obtained.This can provide useful references for the rotation table system design of rotation construction.