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Emergency repair method for concrete box girders

A technology of concrete box girders and concrete bottom slabs, applied in bridge maintenance, bridges, bridge reinforcement, etc., can solve the problems of low vehicle speed, unsuitable for emergency repairs, large deformation of beams, etc. The effect of line operation and reduction of emergency repair costs

Active Publication Date: 2014-10-08
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These bridge repair equipment and equipment are limited to factors such as bridge characteristics, operating speed, transportation weight, and technological level at that time. Low operating speed, neither suitable for emergency repair of concrete box girders on high-speed railway lines, nor suitable for emergency repairs of concrete box girders on heavy-duty railways or road traffic lines with large traffic

Method used

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  • Emergency repair method for concrete box girders
  • Emergency repair method for concrete box girders
  • Emergency repair method for concrete box girders

Examples

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Effect test

example 1

[0033] Example 1 A double-line integrally prestressed concrete high-speed railway box girder with a span of 32 meters was damaged due to the impact of vehicle loads during operation. For this reason, the emergency repair method of concrete box girder is used for repair. The repair method is:

[0034] Step 1: Prefabricate the concrete roof 1, concrete bottom 2, and corrugated steel web 3 according to the size and specification of the 32-meter double-line integral prestressed concrete high-speed railway box girder and store them in the beam storage yard;

[0035] Step 2: remove the damaged concrete box girder, and set up supports 5 between the bridge piers 4 on site;

[0036] Step 3: Go to the beam storage yard and transport the prefabricated concrete roof 1, concrete floor 2, and corrugated steel web 3 to the emergency repair site;

[0037] Step 4: hoisting the concrete bottom plate 2 to the erected support 5, then hoisting the corrugated steel web 3 and performing bolt assem...

example 2

[0039] Example 2 A double-track integrally prestressed concrete heavy-duty railway box girder with a span of 24 meters was damaged by landslides during operation. For this reason, the emergency repair method of concrete box girder is used for repair. The repair method is:

[0040] Step 1: Prefabricate the concrete top plate 1, concrete bottom plate 2, and corrugated steel web 3 according to the size and specification of the 24-meter double-line integral prestressed concrete heavy-duty railway box girder and store them in the beam storage yard;

[0041] Step 2: remove the damaged concrete box girder, and set up supports 5 between the bridge piers 4 on site;

[0042] Step 3: Go to the beam storage yard and transport the prefabricated concrete roof 1, concrete floor 2, and corrugated steel web 3 to the emergency repair site;

[0043] Step 4: hoisting the concrete bottom plate 2 to the erected support 5, then hoisting the corrugated steel web 3 and performing bolt assembly conne...

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Abstract

The invention relates to an emergency repair method for concrete box girders. Emergency repair and fast line recovery of the concrete box girders of urban transportation facilities such as railways and roads are achieved by assembling and splicing prefabricated concrete roofs, concrete bottom plates and corrugated steel webs. Fast and effective emergency repair of the concrete box girders is achieved through the method, dependence on large transportation and hoisting equipment is reduced, the area and the scale of an emergency girder storage field are reduced, emergency repair cost is reduced, and the requirement that girder bodies repaired in emergency are high in rigidity, small in deformation and vibration and low in noise is met, and traffic lines can be recovered fast.

Description

technical field [0001] The invention belongs to the technical field of temporary repair bridges in civil engineering, and relates to an emergency repair method for concrete box girders, which is applied to emergency repair and quick recovery of concrete box girders in railways, highways and urban traffic. Background technique [0002] At present, the concrete box girders used in railways, whether they are high-speed railways or heavy-duty railways, are large-volume, high-mass concrete structures. These box girder structures have large longitudinal and transverse stiffness, good integrity and dynamic performance. , can greatly reduce the deformation, vibration and noise generated during operation. Concrete box girders used in highways and urban traffic also have similar characteristics. The production of these concrete box girders requires a large-scale beam-making yard for production, maintenance and storage; during transportation and erection, large-scale transportation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
Inventor 朱尔玉施明源康亚雄周勇政
Owner BEIJING JIAOTONG UNIV
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