Large-span concrete continuous girder bridge side span folding device and method

A concrete and long-span technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of difficult operation of elevation adjustment, high cost, complicated process, etc., and achieve the effect of solving complex construction process

Inactive Publication Date: 2014-02-12
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0005] In order to solve the problems of complex construction method, long period, high cost and difficult operation of elevation adjustment in the construction method of side-span support of long-span concrete continuous girder bridge, the present invention proposes a side-span closing device and side-span closing device of long-span concrete continuous beam bridge Methods

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  • Large-span concrete continuous girder bridge side span folding device and method
  • Large-span concrete continuous girder bridge side span folding device and method
  • Large-span concrete continuous girder bridge side span folding device and method

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 Shown is the long-span concrete continuous girder bridge structure involved in the present invention, wherein after the main pier 4 and side pier 5 are completed, the beam section 1 is started to be cantilevered in sections, and the beam section is closed at the middle span between the main piers 4. The span closing section 2, the closing section between the cantilever pouring beam section 1 and the side pier 5 is the side span closing section 3, and the main difference of the side span closing device in this embodiment is that the hanging basket 6 is completely integrated with the cantilever pouring beam section 1. Anchored, supported by the closing strut 7 on the side pier simultaneously.

[0027] The frame folding device of this embodiment is as figure 2 and image 3 As shown, it includes two hanging basket truss...

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Abstract

The invention relates to a large-span concrete continuous girder bridge side span folding device so as to solve the problems that the existing side span bracket folding construction process is complex, long in period, high in cost and difficult to adjust and operate. The device comprises a double-frame hanging basket, wherein the frames are connected through a hanging basket gantry; a folding supporting rod is fixed on a side block and supports the front supporting point of the hanging bracket. A side span folding method comprises the following steps: a, moving the hanging basket forwards to the front end of a cantilever; b, anchoring the hanging basket at the cantilever end of the bridge by using an anchoring rod at the middle supporting point of the hanging basket. The invention has the benefits that compared with the existing commonly-used folding section for constructing side span by adopting a full space bracket method, the concrete continuous girder bridge side span folding process and the concrete continuous girder bridge side span folding device utilize the front hanging point of the hanging bracket which is used for supporting the bridge surface and on the side block to form a vertical restraint system with stable continuous girder side span so as to successfully solve the problems that the existing side span bracket folding construction process is complex, long in period, high in cost and difficult to adjust and operate.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to the construction technology of long-span concrete continuous beam bridges, in particular to a device and method for closing side spans of long-span concrete continuous beam bridges. Background technique [0002] Concrete continuous girder bridge is a main structural form of long-span bridge, which is generally constructed by cantilever segmental pouring method. When the construction reaches the stage of the largest double cantilever of the side span, the closing section of the side span is generally constructed by the full-house support method. Afterwards, the mid-span beam sections will be closed using hanging baskets, thus finally completing the construction of the entire superstructure of the bridge. [0003] The requirements for the construction technology (method) of side-span closure of long-span concrete continuous girder bridges are: the full-height support of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10
Inventor 栗怀广郑凯锋徐青松周洪斌何小军苟超文曙东陈力波
Owner SOUTHWEST JIAOTONG UNIV
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