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Wide hollow slab oblique section shearing resistance reinforcing method

A hollow slab, inclined section technology, applied in bridge reinforcement, bridge erection/assembly, bridge maintenance, etc., can solve problems such as inability to use reinforcement methods, limited operating space, and increased engineering costs, achieve good reinforcement effects, and reduce engineering costs. , The effect of enhancing the shear bearing capacity of the inclined section

Active Publication Date: 2020-02-04
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size of the beam body of the hollow slab structure, the hinge space between the beams is small, and the operating space is limited, the above reinforcement method cannot be used; or the high-strength composite material is used for reinforcement, but the project cost is significantly increased, almost close to cost of demolishing new bridges

Method used

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  • Wide hollow slab oblique section shearing resistance reinforcing method
  • Wide hollow slab oblique section shearing resistance reinforcing method
  • Wide hollow slab oblique section shearing resistance reinforcing method

Examples

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Embodiment

[0057] The specific steps of the shear reinforcement method for the oblique section of the wide hollow slab in this embodiment are as follows:

[0058] Step 1. Chisel away bridge deck pavement and wet joints;

[0059] The wet joints and concrete pavement of the old bridge were chiseled away, taking care to avoid damage to the beam body.

[0060] Step 2, chiseling and drilling the beam body;

[0061] And chiseling 0.5cm around the beam body to form an uneven surface; remove surface dust and other objects that affect concrete pouring. according to Figure 4(a) with 4(b) The drilling positions shown in the above are drilled with tools such as electric drills, and the diameter of the drilled holes is 2cm. If the steel bars in the concrete beam body are encountered during drilling, a certain distance can be properly avoided.

[0062] Step 3, placing steel bars and pouring wet joints;

[0063] The stirrups 7 are evenly distributed in the range from H to L / 4 from the beam end at...

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Abstract

The invention discloses a wide hollow slab oblique section shearing resistance reinforcing method. The method comprises the steps that original concrete paving, bituminous concrete paving and hinge joints on a hollow slab bridge are removed; a plurality of drilled holes are formed in edges of center sills and edge beans of the hollow slab bridge correspondingly; a plurality of stirrups are arranged on the center sills and the edge beams in a sleeved mode in the positions of the drilled holes correspondingly, and oblique bend bars are connected between the stirrups; oblique bend bars are connected in the positions, located at webs of the edge beams, between the stirrups sleeved with the edge beams correspondingly; steel bars are embedded in bottom plates of the center sills and the edge beams correspondingly according to a preset spacing; concrete is used for pouring the spaces and joints between the center sills, so that new hinge joints are formed; a ribbed steel mesh is arranged on the upper surfaces of the center sills and the edge beams, and then new concrete paving is formed through pouring; and concrete is poured at the bottoms of the center sills and the edge beams and websof the edge beams correspondingly, and reinforcing is completed. By means of the method provided by the invention, secondary erected stirrups and the oblique bend bars can be utilized for reinforcinga hollow slab on the premise that the cost is reduced, and a good reinforcing effect can be achieved.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a method for anti-shear reinforcement of oblique sections of wide-width hollow slabs. Background technique [0002] The prefabricated simply supported hollow slab girder bridge is widely used in highway construction because of its simple structure, simple design, fast construction, convenient transportation, and separation of prefabrication and construction places to make full use of space. . The simply supported hollow slab girder bridge is composed of many single-slab girders. The girders and slabs need to be connected to form a connecting longitudinal joint to connect the slab girders into a whole. Each slab girder will reserve steel bars. Cross-lap joints between them, and then pour concrete. Since the material of the hollow plate is reduced compared with the solid plate, the self-weight is reduced, and it is more economical and applicable. According to many previous prac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 王业路周勇军宋一凡赵煜姚常伟
Owner CHANGAN UNIV
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