Research Of Key Technique In Double Arch Tower Construction Control Of Cable-stayed Bridge

Special shaped cable-stayed bridge with large span and elegant features, in recent years has been very extensive, part of special shaped cable-stayed bridge has become a local landmark Double arch tower cable-stayed bridge with its unique shape has been recognized by society. Because of the special type of bridge structure, complex stress conditions, bridge construction examples, the construction of the lack of experience, lack of research results, the construction control is difficult At present, the construction of duble arch tower cable-stayed bridge is still controlled by the standard of standard cable stayed bridge. Based on the current situation, this paper studies the key technology of Double arch tower cable stayed bridge in construction control.This paper relying on Fenghe bridge in Xi’an rich road, using finite element analysis software MIDAS/CIVIL model building, analyzes the key technology of the main tower control in the construction of double arch tower cable stayed bridge. Mainly complete the following work:According to the research status at home and abroad, combined with the construction control theory of cable-stayed bridge, the purpose and key technology, The key technology of the steel-double arch bridge in the construction process is put forward.Using the Midas software to establish the double arch tower cable-stayed bridge finite element analysis model, analysis of the double arch tower under live load deflection, combined with the distribution method of arch and beam bridge camber, this paper fit the Double ArchOn the basis of analysis of the double arch tower construction error influence on the cable force of cable-stayed bridge, arch tower shape, arch tower internal force and internal force of the beam line, this paper summarizes the various types of main tower construction error control range.This paper analyzes the change of temperature in the process of construction, with finite element model, analysis the changes of steel tower segments in different temperature, fits the relationship between temperature and displacement, position and displacement, and determine the construction control adjustment value at different temperatures.