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A kind of shear reinforcement method of wide hollow slab oblique section

A technology of hollow slabs and oblique sections, which is applied in bridge reinforcement, architecture, bridge construction, etc., can solve problems such as unavailability of reinforcement methods, limited operating space, and increased project cost, achieve good reinforcement effects, reduce project cost, and enhance oblique Effect of section shear capacity

Active Publication Date: 2020-12-22
CHANGAN UNIV
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  • 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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  • A kind of shear reinforcement method of wide hollow slab oblique section
  • A kind of shear reinforcement method of wide hollow slab oblique section
  • A kind of shear reinforcement method of wide hollow slab oblique section

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Experimental program
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Effect test

Embodiment

[0057] The specific steps of the shearing strengthening method for the oblique section of the wide-width hollow-core slab of the present embodiment are as follows:

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

[0059] Chisel off the wet joints and concrete pavement of the old bridge, taking care to avoid damage to the beam.

[0060] Step 2. The beam body is chiseled and drilled;

[0061] And chisel 0.5cm around the beam to form an uneven surface; remove surface dust and other objects that affect concrete pouring. according to Figure 4(a) and 4(b) The drilling position shown in the figure is to be drilled with tools such as an electric drill. The diameter of the drilled hole is 2cm. If the steel bar in the concrete beam is encountered during drilling, it can be properly avoided for a certain distance.

[0062] Step 3. Place steel bars and pour wet joints;

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

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Abstract

The invention discloses a shear reinforcement method for oblique sections of wide-width hollow slabs, which removes the original concrete pavement, asphalt concrete pavement and hinge joints on the hollow slab bridge; Open multiple drill holes; set multiple stirrups on the center beam and side beams from the drill holes, and obliquely bent steel bars are connected between the stirrups; the stirrups and stirrups set on the side beams The webs of the side beams are connected with obliquely bent steel bars; the bars are planted on the bottom of the center beam and the side beams according to the preset spacing; concrete is poured between the center beam and the center beam and between the center beam and the side beam joints to form new hinge joints; place ribbed steel mesh on the upper surface of the center beam and side beams, and pour to form new concrete pavement and asphalt pavement; pour concrete at the bottom of the center beam and side beams and the web of the side beams , the reinforcement is complete. In the case of cost saving, the invention utilizes secondary erection of stirrups and oblique bending of steel bars to reinforce the hollow slab, and can achieve good reinforcement effect.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a shear strengthening method for an oblique section of a wide hollow plate. Background technique [0002] The prefabricated simply supported hollow slab girder bridge is widely used in highway construction due to its simple structure, simple design, fast construction, convenient transportation, and the 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 girder. The girder slab and girder slab need to be connected to form connecting longitudinal joints, and the slab girder is connected as a whole. Cross-lap joints, and then pour concrete. Compared with the solid board, the hollow board has less material and less dead weight, which is more economical and applicable. According to many previous practical projects, the span of hollow slab beams can reach 8 meters to 20 mete...

Claims

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Application Information

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Patent Type & Authority Patents(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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