Steel girder sling arch bridge construction method applicable to large environmental restriction
A construction method and technology for suspension arch bridges, applied to arch bridges, bridges, bridge forms, etc., can solve problems such as narrow construction sites, high traffic pressure on the ground, and many construction interference factors, so as to ensure construction quality, improve work efficiency, reduce The effect of the impact on residents and the environment
Pending Publication Date: 2019-04-26
CHINA RAILWAY NO 3 GRP CO LTD +1
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Problems solved by technology
[0003] The present invention solves the problem of the construction of steel truss girder and steel box arch suspension bridges in urban downtown areas where the traffic pressure on the ground is high and there are operating subways underground. , narrow construction site, etc., and then provides a steel truss girder suspension arch bridge construction method suitable for large environmental restrictions. The impact of surrounding residents and the environment, improve work efficiency, and ensure the quality of bridge construction
Method used
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Embodiment Construction
[0025] The overall construction process of steel truss girder assembly is: steel pipe pile insertion → horizontal and vertical scissor bracing welding → Bailey beam erection → distribution beam and panel layout → supporting pad jack setting → truck-mounted crane component delivery → lower chord → beam → lower leveling Link → web bar (oblique, vertical) → upper chord, upper flat link → longitudinal beam → horizontal link.
[0026] 1) Platform setup
[0027] The foundation of the temporary pier adopts the inserted steel pipe pile foundation, and the inserted depth is calculated and determined according to the geological conditions of the pier. Scissor braces are set between the steel pipe columns, so that each row of steel pipe columns is connected into an integral lattice column to enhance its stability.
[0028] Steel truss girder assembled platform structure such as figure 1 with 2 As shown, the platform is built with column beams, and the columns are based on inserted stee...
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The invention provides a steel girder sling arch bridge construction method applicable to large environmental restriction, comprising the following steps: assembling a sling arch bridge by dividing into multiple arch rid segments according to a construction sequence of firstly mounting a steel girder and then mounting the sling arch bridge, and hoisting each arch rid segments to places and assembling by utilizing an arch rib support frame by mounting the arch rid support frame on the assembled steel girder. Assembling of the steel girder in the construction site is realized by utilizing an assembling platform, so as to effectively solve the problem that the steel girder cannot be directly hoisted by large equipment due to limited construction environment; meanwhile, gantries of different heights are arranged according to the variable section properties and arc properties of the sling arch bridge, section steel box arch rid segments are transported to places by adopting an electric flatcar through gate type bracket, and then are hoisted to place by using winches at the tops of adjacent gantries and assembled.
Description
technical field [0001] The invention belongs to the technical field of construction of urban municipal steel truss girder arch bridges subject to relatively large environmental restrictions, and in particular relates to a construction method suitable for steel truss girder suspension arch bridges with large environmental restrictions. Background technique [0002] With the continuous development of urban construction, the existing traffic in the city can no longer meet the traffic needs. Urban overpass roads are constantly emerging in modern urban construction. The design of urban bridges not only pursues traffic needs, but also pays more attention to visual aesthetics. Bridges of various shapes continue to appear. Due to the complex surrounding environment of the bridge, narrow space, novel bridge structure and other problems, greater requirements are placed on the construction technology. Aiming at the downtown area of the city, the traffic pressure on the ground is heavy...
Claims
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Login to View More IPC IPC(8): E01D21/00E01D4/00
CPCE01D4/00E01D21/00
Inventor 孙中华李彩红连荣峰李鹏翱罗生民
Owner CHINA RAILWAY NO 3 GRP CO LTD