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Ningbo-Taizhou- Wenzhou Railway Yandangshan King the superimposed arch bridge construction key technology research

Author: MeiChangAn
Tutor: ShengXingWang；LiuGuoLong
School: Central South University
Course: Architecture and Civil Engineering
Keywords: Superimposed arch bridge Steel box girder Steel box arch Top Rafah Assembled Finite Element
CLC: U445.4
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 0
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Abstract

Based on the the Yongtaiwen railway across the highway Yandangshan King superimposed arch bridge engineering construction needs, system to bridge 2-90m the superimposed arch bridge fabrication and assembly of steel box girder composite arch bridge 184 meters of steel box girder top pull construction, the large tonnage superimposed steel box arch precise lifting the closure. Seriously study the precise lifting steel box girder and steel box arch factory sub-block manufacturing and field welding, assembling construction technology and steel box girder top pull construction, the large tonnage overlapping steel box arch closure Rib Alignment control construction technology and other content. The main content of the paper are summarized as follows: 1. Composite arch bridge steel box girder, arch manufacturing process studies 1) multi-program process manufacturing steel box girder and steel box arch proposed segmented block control measures to address processing size and component transportation size restrictions and other factors to ensure that the manufacturing of laminated arch steel bridge, steel box girder assembly quality, to achieve the design intent. 2) steel beam assembled by the demonstration of the total assembly programs, research and implementation of effective guarantee Dimensions and internal structure of the steel beam size, especially the program being installed in the oblique ASSEMBLY METHOD effective solution manufactured in steel beams tire tool set generated by elastic deformation and welding shrinkage steel beam size control accuracy. 3) QC quality control method to control the steel beams girth weld quality, effective control of the welding quality, and the development of a single-box multi-room steel box girder ring weld quality control process. 4) of the high-frequency ultrasonic hammering technology in the manufacture of railway steel bridge to eliminate the welding residual stress, improve weld fatigue strength test research to solve the steel beam weld centralized caused by welding residual stress concentration problems, and effectively improve the manufacturing quality of the steel bridge. 2.2-90m composite arch bridge 184 meters of steel box girder top-drawing process research) on the basis of the finite element analysis, and drag the existing steel truss hoist system BRIDGES advantage of incremental launching construction and proposed a set of \shelves assembled steel box girder, steel box girder assembled to complete top Rafah in place \2) top pull construction using the most advanced equipment top pull ZLD-150 continuous-acting jack, speed up the construction progress, but also ensures that the top pull construction smoothly, frequently moving to avoid the main pier - static friction alternating action arising under the swing, and is conducive to the stability of of the pier. Point of steel box girder front-end and back-end layout constraints, to provide a guarantee for the precision control top pull process. 3) chute systems creative design adjustable hydraulic bearing fulcrum height is reduced by adjusting the pull-push process, in order to achieve control of the force of the steel box girder, thus achieving the steel box girder stress control, to ensure that the steel box girder top pull After quality. 4) limit, the corrective process dynamics in Rectification to set jack power systems on both sides of the steel box girder traveling interval When the the continuous role jacks start, steel box girder is in dynamic equilibrium, due to the elevation error between the slide bearings, skateboard patchy, and other reasons, the steel box girder inevitable rotation. Beam of uniform motion occur simultaneously rotating body is very small lateral force can achieve dynamic concept forward direction control, to ensure the top pull progress, improve operational efficiency, to achieve one-time continuous steel box girder Jacking and accurate place. 3.2-90m the superimposed arch bridge steel box arch assembly construction technology research 1) on the main arch installation cable crane car crane and gantry crane was the scheme comparison to determine the gantry crane program; 2) the completion of the Main Arch assembled bracket Design 3) on the Main Arch assembling the installation process, leveling measures, welding process and its closed process system, and ensure the smooth installation of the main arch in place text last brief introduction to the study bridge construction job content and the use of a number of innovative approaches, the main conclusions of the research, to promote the value of its significance.

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