Manufacturing technology of magnetic suspension prestressed reinforced concrete rail beam
A technology of prestressed steel bars and track beams, which is applied to joists, girders, trusses and other directions, can solve the problem of not reaching the high precision of magnetic levitation prestressed reinforced concrete track beams, not overcoming the influence of structural performance and dimensional accuracy, Problems such as low dimensional accuracy, to achieve the effect of reducing errors, reducing the influence of deformation, and reducing manufacturing costs
Inactive Publication Date: 2005-06-29
SHANGHAI MAGLEV TRANSPORTATION DEVELOPMENT CO LTD +1
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[0004] (2) The existing technology only uses post-tensioning prestressing or pre-tensioning prestressing, and the prestressing is only used to improve the mechanical properties of the structure, and the influence of the structural deformation caused by the prestressing on the structural performance and dimensional accuracy is not overcome
[0005] (3) The existing technology uses broken lines to form curves, the line shape is not smooth, the dimensional accuracy is not high, and it cannot meet the high precision requirements of the magnetic levitation prestressed reinforced concrete force track beam
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[0030] Referring to Fig. 1 , there is a support 2 at the lower end of the beam body 1, and a connecting part 3, a stator 4 and a functional part 5 at the upper part.
[0031] The manufacturing method technological process of present embodiment track girder is:
[0032] Raw material inspection→steel bar processing→steel bar binding→bottom mold cleaning and support adjustment and positioning→steel bar skeleton hoisting and loading into molds→end mold installation→installation of connectors→installation and adjustment of side formwork→connection of connectors and linear adjustment device→beam upper flange Measurement and positioning of alignment and connectors → flange plate reinforcement binding → pre-tensioned prestressed construction → re-measurement and adjustment of the upper flange alignment of the beam body and connectors → concrete mixing → concrete pouring and pounding → static stop for 6 to 8 hours → alignment of the track beam top Concrete plastering on the surface → c...
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The invention provides a method for manufacturing a magnetic levitation prestressed reinforced concrete track beam. Including formwork installation, concrete pouring and tamping, stripping, post-tensioning prestressed construction, it is characterized in that the upper flange line shape of the beam body and the measurement and positioning of the connectors are set between the formwork installation and the concrete pouring and tamping process, and the flange plate steel bars are bound. Tensile prestressing construction, beam body flange alignment and connecting piece measurement and adjustment process, a pre-tensioning prestressing relaxation process is set between the stripping and post-tensioning prestressing construction, and the post-tensioning prestressing construction pipeline is grouted and anchored. The obtained track beam is transported to the constant temperature workshop for finishing, and then the functional parts equipped with iron cores are installed on the finished track beam, and then other accessories are installed, and the magnetic levitation prestressed reinforced concrete track beam can be obtained by testing. The manufacturing method of the invention can reduce the manufacturing cost, overcome the influence of the deformation of the structure caused by the prestress on the service performance of the structure, improve the precision of the structure size, and meet the high precision requirements of the magnetic levitation prestressed reinforced concrete track beam.
Description
Technical field: [0001] The invention relates to a method for manufacturing a prestressed reinforced concrete track beam, in particular to a method for manufacturing a magnetic levitation prestressed reinforced concrete track beam. Background technique: [0002] Prestressed reinforced concrete structures have been widely used in various building structures, such as railway bridges, highway bridges and light rail traffic bridge span structures. Its manufacturing processes include: steel bar processing, steel bar binding, formwork installation, concrete mixing and transportation, concrete pouring and tamping, concrete curing, post-tensioning prestressing or tensioning prestressing construction, stripping, etc. There are following weak points in these prior art: [0003] (1) The manufacturing method of existing prestressed reinforced concrete beams (such as: railway bridges, highway bridges) must have a one-to-one correspondence between the formwork and the products of the sam...
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IPC IPC(8): E01D19/00E04C3/26
Inventor 田宝华王长留石元华李奎张长春高克军王红陈兵
Owner SHANGHAI MAGLEV TRANSPORTATION DEVELOPMENT CO LTD
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