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Early-stage pre-maintenance complete technology for small hinge joints of plate girder bridge

A technology of pre-maintenance and slab girder bridges, applied in bridges, bridge maintenance, bridge reinforcement, etc., to achieve the effects of uninterrupted traffic, enhanced shear force transmission capacity, and extended service life

Active Publication Date: 2017-07-18
上海浦江桥隧运营管理有限公司 +1
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  • Description
  • Claims
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Problems solved by technology

[0022] Aiming at the early diseases of the small hinge joint structure of the slab girder bridge, in order to solve the existing problems, the present invention aims

Method used

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  • Early-stage pre-maintenance complete technology for small hinge joints of plate girder bridge
  • Early-stage pre-maintenance complete technology for small hinge joints of plate girder bridge
  • Early-stage pre-maintenance complete technology for small hinge joints of plate girder bridge

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Embodiment Construction

[0035] The present invention will be further described now in conjunction with accompanying drawing.

[0036] see figure 2 , figure 2 Shown is a schematic diagram of an embodiment of the present invention, wherein a slab girder bridge includes a slab girder 1 and a bridge deck pavement 2, and the specific implementation of the present invention is:

[0037] a. The "Hinged Slab Girder Hinge Joint Condition Detection Method" was used to conduct a comprehensive inspection of the slab girder bridge, and the pre-maintenance repair process was used to repair the early damage hinge joints of the slab girder bridge;

[0038] b. Drill φ32 holes on the side of the plate girder with a 45°~60° oblique water mill (forming channel 5);

[0039] c. From the bottom of the plate girder, use a high-pressure water gun to clean the dust and debris between the plate gaps;

[0040] d. In order to ensure the grouting effect, the two ends and the bottom of the grouting area 4 are blocked;

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Abstract

The invention relates to an early-stage pre-maintenance complete technology for hinge joints of a plate girder bridge. The early-stage pre-maintenance complete technology comprises the following steps: performing water milling drilling on the side faces of the plate girders in an inclined mode at 45 degrees to 60 degrees in the gap between the adjacent original plate girders; selecting a grouting area and plugging the two ends and the bottom of the grouting area; forming a grouting hole in the bottommost part of the grouting area, and injecting grout from the grouting hole to form an anti-shearing force pin; disassembling the plate bottom plugging material and polishing the plate bottom after the grout is solidified. According to the early-stage pre-maintenance complete technology for the hinge joints of the plate girder bridge, the plate bottom sectional grouting mode is adopted to fill the spalling concrete of the hinge joint area, thereby enhancing the transmission shearing force capacity among the plate girders, so that the effect of prolonging the service life of the hinge joints can be achieved; the anti-shearing force pin is formed after grouting cement-based grouting material between inclined hole-forming channels and the plate-girder joints, so as to enhance the transmission shearing capacity of the adjacent plate girders; and the technology has the advantages of no interruption of traffic, being economical and quick.

Description

technical field [0001] The invention relates to a complete set of technology for pre-maintenance of a plate girder bridge, in particular to a complete set of technology for early pre-maintenance of hinge joints of a plate girder bridge. Background technique [0002] Concrete hollow slabs are widely used in prefabricated simply supported beam bridges because of their light weight, good structural performance, convenient construction, and mass prefabrication in factories. see figure 1 , the beam width of prefabricated hollow slab girders is generally about 1m, and the horizontal transmission of load is realized by means of hinge joints to transmit shear force between hollow slabs, and the load is distributed laterally to adjacent slabs to jointly participate in the force. In order to strengthen the structural integrity of the hollow slab, the pavement layer of the bridge deck also participates in the stress. The steel bars in the prefabricated slab girder are protruded and bo...

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Application Information

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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 夏姝丽任载权
Owner 上海浦江桥隧运营管理有限公司
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