Study On Cantilever Construction Technology Of The Passenger Special Line Of Large-span Continuous Beam In Gobi Desert Region

Prestressed concrete continuous girder bridge with span, is conducive to the smoothtraffic,and overall performance is good, strong seismic ability, convenient construction,easy maintenance and ease of cantilever construction. In the design of Railway Passenger Dedicated Line in China, when facing gully, highways and other obstacles,the structure is more and more. Although the domestic construction technology of this type of structure are studied more, but relies on the project background, a single studyhas certain limitations, there is still space for supplement.This paper relies on the project as the object of Lanzhou Jiuquan second lane overpassbridge Lian Huo Expressway(60+100+60) m large span continuous beam. The projectis located in Jiuquan area, the perennial wind, winter snowfall, climate conditions are harsh, and across the highway. A series of unfavorable factors of the construction of the bridge, to bring great difficulty.This paper mainly from the design and construction of highway protection scaffolding, continuous beam 0# block, line bracket design of cast in place cantilever hanging basket construction period and construction details, details of the complex environment, large span continuous beam hanging basket construction process, linear control etc..Among them, design and construction of protective scaffolding highway mainly introduces the factors affecting stress, column, beam, longitudinal beam, material the roof of theconstruction monitoring and construction control key; mainly introduces the principle and method of monitoring, structural analysis, division of the stages of construction, the establishment of the finite element model, observation method, error analysis andidentification of stress, temperature monitoring content of the vertical mold elevationcalculation and alignment and construction technology are introduced; the installation of bearing, the design and construction of the temporary consolidation, design and construction of block and line segment 0# beam bracket, template construction,cantilever construction of prestressed concrete and closed, Duan Shigong and construction etc.In a word, this paper combined with the background of the project is located in Gobi,windy, dry area, complex and special environment across the highway, from all aspectsof construction, introduces the construction technology of large span continuous beam cantilever passenger dedicated line under this condition. Targeted gives the solution of many problems and specific methods. To a certain instruction function to the futureconstruction of similar bridge up.