Monitoring Of T Rigid Frame Bridge Construction Technology Research

With the gradual improvement of China's social infrastructure construction,the planning and construction of the public railway network continues to be completed and the lines are complicated.Therefore,the projects for construction of cross-over bridges are becoming more and more frequent in order to minimize the impact on the original lines.The utilization rate of resources and construction efficiency have all improved,along with the development and construction of the rotating construction technology.The rotating construction technology has also become mature and mature,and its advantages have gradually become prominent.Not only that,but the road network in some developed areas is becoming more and more developed,so infrastructure construction is also being carried out in remote areas.The restrictions on geographical conditions have also brought a lot of challenges to construction,but the rotating construction technology can be combined with local The conditions for production and construction,the rational use of advantageous advances in the advancement of the terrain,and the subsequent transformation and integration of the dragons,are particularly suitable for the construction of bridges under severe geological conditions such as deep valleys and deep water flow.Based on the monitoring project of a T-shaped bridge spanning an existing railway line in the South Second Ring Road of Shijiazhuang,this paper analyzes the complete system of rotating construction monitoring and uses the flip-up analysis method to calculate the theoretical deformation of each process separately.The final design linearity is the starting point,which is followed by a retrogression of the previous construction process until the initial elevation of the vertical model is calculated.The preloading test of the bracket adopts the segmented preloading due to the construction conditions and the impact of the supply of materials,and the full bracket cannot be used.The one-time overall preloading;stress and strain monitoring throughout the entire process of the construction,to ensure that within the allowable range,if there is a large deviation in the next process to make fine adjustments,the fineness of the linear control will directly affect the final closure of the dragon Accuracy,and at the same time,the linear control of each construction stage in the previous period is also an effective means to ensure that the bridge can be smoothly completed after the bridge is turned.The monitoring of the stress ensures the overall safety and is also an important aspect of monitoring;the weighing test and the counterweight scheme are structures.The important guarantee for a smooth transition,especially the higher accuracy of the structural weight for large weights,As a result,the driving force can be minimized at the end and the structure can be smoothly turned into position.In this paper,the main and key technologies in the entire construction process of the bridge swivel are also explained,as well as the brief process ofusing MIDAS to model the whole bridge,simulating the stress and linear changes of each working condition,and continuously monitoring the actual construction.The stress and strain of the working conditions are compared with the theoretical calculation values,and fine-tuning is continuously carried out so that the stress and linearity of each construction stage are within the involved range,thereby completing the closure.In addition to the actual construction conditions and procedures,the emphasis is placed on verifying and comparing the one-time total preloading test program and the stepwise preloading program for the stent,and analyzing the gap size;second,the traditional weighted test is also performed properly.The optimization hopes to provide inspiration and help for the future construction.