Twist Across The Existing Railway Birdge Construction Technology

As the technological development and technological progress, and twist thebridge construction process for the safe operation of the existing railway lineimpact is smaller, but also safe, reliable, convenient construction, low cost, andbecause of Beijing’s local railway, the rapid development of road network, makingacross the existing railway line overpass beam gradually increased, twist theadvantages of the bridge construction technology has become increasinglyprominent, will gradually replace other in-situ, precast beam erection process, theconstruction of road network and the country’s contribution to the growingeconomy.Currently, the swivel bridge construction precedent in the international arenathere are many, but mostly single swivel bridge and cable-stayed in the majority,when the twist in the bridge, both sides of the beam deflection stayed on both sidesof the Central pier claim to control. But those who are not a large cable-stayedbridge T-rigid frame, requires precise control of beam deflection and twist after theclose accuracy. For two-piece swivel bridge technology while simultaneouslyrequiring the same time start the twist, with speed control, the same corner, socontrol is essential.Topics of this paper is based on the author’s work practices and learning,based on the literature to Tongzhou District, Beijing East Sixth Ring Road, themain road west of Beijing and Tianjin-Yu-west road across the street railway lineproject Zhangjiawan large T type rigid frame bridge, for example, focuses on largecable-stayed cantilever with no twist double amplitude while T-rigid frame bridgeprocess and control measures, and described the main points of twist across theexisting railway construction preparation, test switch, pre-transfer formal twist andtwist each step of the work should pay attention to synchronization, but also on theconstruction process are described. Twist on the structure of the bridge re-4800kNball hinge selection, boost power, dynamic friction torque, inertia braking distance,the static friction torque, traction and other major technical parameters Checking,ball joints installed, balanced system, traction system, boosting system the maincomponents of the original set and method for temporary anchoring and locking,swivel rehearsal, security measures and other key aspects of the organization hasbeen systematically studied.