An arch bridge reinforcement device and method

A reinforcement device and arch bridge technology, applied in bridge reinforcement, bridge, bridge construction, etc., can solve problems such as concrete cracking and deflection, and achieve low bearing capacity loss, high tensile strength and bonding strength, and small self-weight load Effect

Active Publication Date: 2021-10-29
SHANDONG JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of existing arch bridge secondary construction reinforcement methods, the present invention aims to provide a controllable arch bridge reinforcement device that can simultaneously solve the problems of concrete cracking and mid-span deflection, and has simple component processing and convenient and quick construction.

Method used

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  • An arch bridge reinforcement device and method
  • An arch bridge reinforcement device and method
  • An arch bridge reinforcement device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment discloses an arch bridge strengthening device, which is suitable for strengthening the arch bridge during the service period of the arch bridge. The service period of the arch bridge is often different due to the influence of its use environment and its own structure, and the strengthening device provided by this embodiment Can be used on most arch bridges.

[0042] Please refer to figure 1 , the specific structure of the present embodiment includes a fixed support 2, a steel pipe sleeve 4, an anchor system 5, a prestressed steel strand 7 and a prestressed metal bellows 8, and the fixed support 2 has multiple, multiple fixed support 2 are attached to the bottom of the arch bridge, and steel pipe sleeves 4 are connected between adjacent fixed supports 2; the anchorage system 5 is fixed on both ends of the arch bridge, and the ends of the prestressed steel strands 7 are fixed on the anchorage system 5, and the prestressed steel Stranded wire 7 passes thro...

Embodiment 2

[0054] This embodiment discloses a method for strengthening an arch bridge. After processing in this embodiment, the bottom side of the arch bridge can form an arch bridge strengthening device as shown in Embodiment 1.

[0055] This embodiment includes the following steps:

[0056] Use the self-anchor bolt 6 to pass through the backing plate 9 with bolt holes reserved, and then the self-anchor bolt 6 penetrates into the pre-drilled hole in the concrete at the bottom of the arch, and drives the steel casing 16 with a gap into it with the help of tools In the cone of the bolt bolt rod 15 with the plug, the gap end of the steel casing 16 with the gap begins to expand at this moment, and the self-anchor bolt 6 is preliminarily anchored on the arch bottom concrete of the arch bridge 1 to be reinforced;

[0057] Then put nut 17 steel washer 14 on self-anchor bolt 6, tighten the nut 17 of self-anchor bolt 6, along with the tightening of nut 17, the screw rod body of the bolt bolt rod...

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PUM

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Abstract

The invention discloses a reinforcing device and method for an arch bridge, which comprises a trapezoidal steel backing plate, a fixed support, a casing and a prestressed steel strand, wherein a plurality of trapezoidal steel backing plates are arranged, and the plurality of trapezoidal steel backing plates are fixed on the arch bridge. At both ends of the bottom surface, multiple fixed supports are evenly distributed on the bottom surface of the arch bridge between multiple trapezoidal steel backing plates, and the multiple fixed supports are fixedly connected to the bottom surface of the arch bridge. Both ends of the stress steel strand are fixed on the trapezoidal steel backing plate, and the prestressed steel strand passes through multiple sleeves. The invention solves the problems of concrete cracking and mid-span deflection at the same time, and the component processing is simple, and the construction is convenient and quick.

Description

technical field [0001] The invention relates to the field of arch bridge construction, in particular to an arch bridge reinforcement device and method. Background technique [0002] With the continuous increase of the service life of the arch bridge and the increasing traffic load on the bridge deck, this will inevitably lead to defects such as mid-span deflection and concrete cracking in the arch bridge concrete, thereby reducing the bearing capacity of the arch bridge and the stability of the bridge, and it needs to be reinforced deal with. In the existing technical field of arch bridge reinforcement, there are mainly the following arch bridge reinforcement methods: [0003] ① Enlarging section method: This method is currently the most widely used reinforcement method, although it can increase the bending stiffness of the section and play a role in reinforcement. However, the inventor believes that the size of the reinforcement layer of this method is often large, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 王保群徐刚年陈成勇邢德进刘金樟杜业峰
Owner SHANDONG JIAOTONG UNIV
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