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Early pre-maintenance method for small hinged joints of slab girder bridges

A pre-maintenance, slab girder bridge technology, used in bridges, bridge construction, bridge maintenance, etc., to achieve the effect of not interrupting traffic, enhancing the ability to transmit shear force, and prolonging service life

Active Publication Date: 2021-10-15
上海浦江桥隧运营管理有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The present invention aims at the early disease of the small hinge joint structure of the slab girder bridge, in order to solve the existing problems, and aims to provide an early pre-maintenance method for the hinge joint of the slab girder bridge with uninterrupted traffic, low cost and fast construction

Method used

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  • Early pre-maintenance method for small hinged joints of slab girder bridges
  • Early pre-maintenance method for small hinged joints of slab girder bridges
  • Early pre-maintenance method for small hinged joints of slab girder bridges

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Embodiment Construction

[0034] The present invention will be further described now in conjunction with accompanying drawing.

[0035] 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:

[0036] a. The slab girder is fully inspected using the "Hinged Slab Girder Hinge Seam Condition Detection Method", and it is determined that the slab girder bridge has early damage to the hinge joint and is repaired by the pre-maintenance repair process;

[0037] b. Drill φ32 holes on the side of the plate beam with a 45°~60° oblique water mill (forming the hole 5);

[0038] c. From the bottom of the plate beam, use a high-pressure water gun to clean the dust and debris between the plate gaps 3;

[0039] d. In order to ensure the grouting effect, the two ends and the bottom of the grouting area 4 are blocked;

[0040] e. Set...

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Abstract

The invention relates to an early pre-maintenance method for hinge joints of slab girder bridges, which comprises: water-milling holes on the sides of slab girders at an angle of 45° to 60° at the gaps of adjacent original slab girders; selecting a grouting area, And seal both ends and the bottom; set grouting holes at the bottom of the grouting area, inject grout from the grouting holes to form shear pins; The bottom is polished. The present invention uses segmented grouting at the bottom of the slab to fill the peeled concrete in the hinge joint area, which can increase the shear force transmission capacity between the slab girders, so as to achieve the effect of prolonging the service life of the hinge joints; The gaps are grouted with cement-based grouting materials to form shear pins to enhance the shear force transmission capacity of adjacent plate girders; it has the advantages of uninterrupted traffic, economy and speed.

Description

technical field [0001] The invention relates to a complete set of pre-maintenance technology for slab girder bridges, in particular to an early pre-maintenance method for hinge joints of slab girder bridges. 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 bound to the same steel bars of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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