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Hollow slab beam shear-resistant reinforcing method and hollow slab beam shear-resistant reinforcing device

A hollow slab beam and reinforcement device technology, applied in bridge reinforcement, bridge, bridge maintenance and other directions, can solve problems such as structural damage, and achieve the effects of avoiding cracking, avoiding beam-slab vibration, and weakening the stress state of a single beam

Pending Publication Date: 2021-12-14
SHANGHAI PUDONG NEW DISTRICT ROAD CONSTR DEV
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  • Abstract
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Problems solved by technology

However, this kind of cavity grouting method needs to chisel off the top of the plate beam, which will inevitably cause damage to the original structure

Method used

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  • Hollow slab beam shear-resistant reinforcing method and hollow slab beam shear-resistant reinforcing device
  • Hollow slab beam shear-resistant reinforcing method and hollow slab beam shear-resistant reinforcing device
  • Hollow slab beam shear-resistant reinforcing method and hollow slab beam shear-resistant reinforcing device

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Embodiment Construction

[0047] The present invention is described in detail below in conjunction with accompanying drawing:

[0048] According to one aspect of the present invention, a shear strengthening method of a hollow plate girder is provided. see figure 1 with figure 2 , the hollow slab beam reinforcement method includes the following steps:

[0049] Firstly, a recessed area 12 is provided on the upper end of the bridge 1 .

[0050] The bridge 1 comprises a hollow slab girder 10 . A hinge joint is formed in the hollow plate girder 10 of the bridge 1 . At least one through hole is provided in the hinge joint of the hollow plate girder 10 , which communicates with the recessed region 12 . In this embodiment, hinged joint refers to the post-cast concrete (filling joint) between the prefabricated slab girders in the bridge 1 project, which connects two slab girders, and is carried out before the bridge deck pavement construction after the slab girders are installed. For example, as shown, t...

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Abstract

The invention provides a hollow slab beam shear-resistant reinforcing method and a hollow slab beam shear-resistant reinforcing device. The hollow slab beam shear-resistant reinforcing method comprises the steps that: a sunken area is arranged at the upper end of a bridge; at least one through hole is formed in a hinge joint of a hollow slab beam of the bridge, and the through hole is communicated with the sunken area; an upper connecting piece is fixedly arranged in the sunken area, and a lower connecting piece is fixedly arranged at the lower end of the bridge; an opposite-pull rod is arranged in the through hole, and the two ends of the opposite-pull rod are fixedly connected to the upper connecting piece and the lower connecting piece respectively; and the sunken area is repaired. According to the invention, the upper connecting piece, the lower connecting piece and the opposite-pull rod form a reinforcing assembly, so that the transverse connection between a slab and a beam can be enhanced, the stress state of a single beam is weakened, the vibration of the beam and the slab is avoided, and the cracking and discretization of a crack repairing adhesive are avoided.

Description

technical field [0001] The invention relates to a hollow slab beam shear reinforcement method and a hollow slab beam shear reinforcement device. Background technique [0002] The bridge bearings are mainly responsible for shear loads. Especially for prefabricated hollow slab girder bridges, the lateral distribution of loads at the beam ends is close to zero. Therefore, the shear force at the beam end of the plate girder is basically borne by the single beam. [0003] The hollow plate girder is limited by its structural type, and its web thickness is small, which often leads to insufficient shear resistance in the area of ​​the maximum shear force at the end of the plate girder. In particular, when a large-span prestressed hollow slab girder is used, the initial tension of the prestressed bundle at the beam end makes the web at the beam end area in a state of superposition of bending and shear forces, which often causes the web at the beam end area of ​​the hollow slab gird...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 杨浩李善亮张承善谢晓阳于光和马春晖
Owner SHANGHAI PUDONG NEW DISTRICT ROAD CONSTR DEV
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