Large-cantilever bent cap tensioning anchorage temporary support device and construction method thereof

Abstract

The invention provides a large-cantilever bent cap tensioning anchorage temporary support device. The device comprises a bent cap pre-embedded steel circle pipe arranged on a long-span bent cap, a cushion cap pre-embedded steel circle pipe arranged on a cushion cap and a plurality of standard-knot fine rolled deformed steel bars connected through deformed steel bar sleeves. The upper position and the lower position of the bent cap pre-embedded steel circle pipe are arranged corresponding to the upper position and the lower position of the cushion cap pre-embedded steel circle pipe, and the standard-knot fine rolled deformed steel bars are connected in sequence to form a screw-thread steel column. The upper end of the screw-thread steel column penetrates through the bent cap pre-embedded steel circle pipe, the end is fixed with a screw-thread steel subplate, a screw-thread steel gasket and a screw-thread steel nut in sequence, and the lower end of the screw-thread steel column is screwed in the cushion cap pre-embedded steel circle pipe to be fixed. The invention further provides a construction method of the large-cantilever bent cap tensioning anchorage temporary support device. The construction process is less and the method is simple. When a bent cap and a cushion cap are poured, only a pre-embedded work needs to be done well, and when a bridge construction machine is about to be in place, only a small amount of manual work is needed to install the fine rolled deformed steel bars. Compared with other construction methods, a lot of personnel investment and equipment investment can be reduced, and the range of application is wide.

Description

technical field [0001] The invention relates to the technical field of bridge erection construction, in particular to a temporary tension anchoring support device for a large cantilever cover beam and a construction method thereof. Background technique [0002] In the construction of urban girders, in order to adapt to the complex road network of the city, the setting of piers and columns is often not evenly distributed. In the intersection area, in order not to split the existing highway, it is often necessary to set up a long-span bridge, and due to the design limitation of the bridge structure, the length of the box girder needs to be consistent, so a long-span cover beam structure is produced. [0003] When the bridge erecting machine used for standard span erection erects these long-span box girders, the outriggers will stand on the cantilever section of the large-span cover beam, which will cause a huge bending moment to the cover beam and pier column and exceed its st...

AI Technical Summary

Problems solved by technology

[0004] However, using the above temporary pier scheme requires not only processing or renting the temporary pier, but also erecting and dismantling the temporary pier. This will be a relatively large cost expenditure, and it will often become a control in the beam erection work. sex engineering

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