Research On Swivel Construction Monitoring And Control Technology For T-shape Rigid Frame Bridge

Bridges are increasingly utilized to cross over other traffic lines such as railways,highways and rivers,and the swing method of bridge construction is becoming more and more widely used on account of its obvious advantages. Supporting frames, on which concrete will be poured during construction, are built on both sides of the terrain. The beam of the bridge will be swiveled to the correct position by the rotatable structures consisting of ball bearing and slides, without interrupting naval navigation and road traffic. Due to safe and convenient construction and the elimination of the complex high-altitude operations, the swing method has significant socio-economic benefits.With the development of our national economy, more and more large span bridge and new structure needs be construction. In order to ensure the safety of bridge construction, we do some monitoring in most bridge construction. The objective of bridge constructure monitoring is to ensure the internal force security and the beautiful linear. Make the actual linear and the actual stress values near the design values of the bridge. We laid the high precision sensor in the key parts of cantilever girder and measured the data when the condition changes and analysis the data to adjust the construction until the bridge complete.On the ground of the T-shape rigid frame, We use MIDAS software to set up the finite element model which is used to analyze the whole construction process. We get the stress and deformation in cantilever construction process. We laid concrete, temperature sensors and the height measuring point under the program in the bridge. Deflection, temperature and stress are abserved, we analysis the structure data so as to provide a reasonable and proper guidance for the construction. At the same time, We laid temperature sensors in the cushion cap and measure the two days’ hydration temperature after the concrete poured. We use MIDAS software to set up the hydration finite element model in order to get the theoretical value.In order to ensure the safety and smooth of rotation.process. We need to have a balance weighing test to get the unbalanced torque, friction coefficient and so on. So we can take the weight measures to ensure that the rotating bridge will swivel smoothly.