Research On The Control Of Continuous Beam Bridge In High-speed Ballastless Track Railway

Unballasted rack bridge is to adapt to a situation of rapid development of new structure. Such bridge must have sufficient strength and rigidity to ensure the smooth passage of high-speed trains. Therefore, it frequently uses continuous beam bridge structure. Because this structure has the advantages of low cost, fast construction progress, and ructural rigidity. Current international and domestic, Unballasted rack Continuous Beam bridge often take the construction methods of cantilever.In process of Cantilever construction, the beam going through a complex history of the force.. Meanwhile, throughout the construction process there are a series of factors and uncertainties identified the main beam of the force, displacement situation and structure of the internal temperature of the situation. These factors will have a greater impact on the bridge of the strength, stiffness and durability. To ensure that unballasted rack bridge achieves the expected project quality requirements, the main beam construction monitoring is essential.This research project based on Shahe continuous bridge of Wuhan to Shijiazhuang Railway. Described in detail in the content and method of the non-continuous beam Track control, and construction control several key issues. On the improvement and optimization of conventional large span continuous bridge construction control, Proposed for long-span continuous bridge not Track construction monitoring program.In the study, simulation analysis and simulation to Shahe continuous beam bridge by calculation software of Dr. bridge V3.03.The paper describes in detail the process of modeling, and Proper fitting by a variety of operating conditions during the construction form of the Boundary Condition Constraints, Accurately calculate the construction process stress and displacement of key sections. To provide a reliable basis for construction control, and ensure the smooth progress of the project...