Research On Construction Techniques Of Continuous Beam Across The Highway On Passenger Dedicated Lines

Prestressed concrete continuous beam bridge with a span, is conducive to smooth traffic and good overall performance structure, seismic capability, construction of fast, easy maintenance and easy cantilever construction and other points. Using cantilever construction method of prestressed concrete continuous beam bridge,its construction process is very complex,but continuous beam bridge structure into a bridge internal force and linear are closely related to its construction methods and construction process.In China's railway passenger line design, when faced with ravines, roads and other obstacles, more and more use of the structure. Although this type of domestic research structure construction technology more, but by relying on different engineering background, a single study has some limitations,there is still room supplement.Institute of engineering objects paper relies to the Beijing-Shijiazhuang Shijiazhuang-Taiyuan passenger dedicated direct line across the Green Bank Expressway Bridge(60+100+60)m continuous prestressed concrete beams. The project spans the highway.This series of unfavorable factors, the bridge construction to bring greater difficulty.Construction control of continuous beam bridge is to make the bridge between the structure linear and internal forces control within a reasonable range,and achieve precise control of continuous beam bridge closed,make the continuous beam bridge construction smoothly.This article details the construction of continuous beam across the highway from the design and construction of protective scaffolding, continuous beam 0 # block, line segments cast segment stent design and cantilever Cradle check count and other aspects, detailing the complex environment, large-span continuous Basket contents beam construction technology,safety, quality control points and linear control and other aspects. After all, continuous girder bridge system differs from other bridges in the construction process needs to be temporary pier beam consolidation in order to achieve a stable state by force.Among them, the highway design and construction of protective scaffolding focuses on the factors affecting the force, material selection and construction of columns, beams, rails,roof control points; construction monitoring introduces the principles and methods of monitoring, structural stress analysis division of the various stages of construction, the finite element model to calculate the elevation of formwork and linear and stress observation method, error analysis and recognition, temperature monitoring and other content;construction technology introduces the bearing installation, temporary consolidation design and construction of 0 # block and stent design and construction, beam formwork construction,cantilever segmental construction line segment, and the Closure Segment Construction and prestressed concrete construction and other content.In summary, this paper engineering background, special requirements conditions across the highway, starting from all aspects of construction, details of Passenger Dedicated large-span continuous beam cantilever construction technology under this condition. Targeted gives solutions to many problems and specific methods. For subsequent construction of similar bridge played a guiding role.