Construction method used for carrying out strengthening treatment on heavy haul railway bridge

A technology that strengthens treatment and construction methods, and is applied in bridges, bridge repairs, bridge reinforcement, etc., and can solve problems such as concrete weakening

Active Publication Date: 2012-07-04
CENT SOUTH UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the traditional paste steel plate reinforcement technology needs to add U-shaped hoop plates or expansion bolts to fix the steel plate, which will cause the weakening of the concrete in the tension zone.

Method used

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  • Construction method used for carrying out strengthening treatment on heavy haul railway bridge
  • Construction method used for carrying out strengthening treatment on heavy haul railway bridge
  • Construction method used for carrying out strengthening treatment on heavy haul railway bridge

Examples

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Embodiment Construction

[0097] Preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein the reference numerals are represented as: among the figures, the reference numerals are represented as: 1-concrete T beam; 2-reverse top support; 3-concrete T beam bottom plate; 4 -Concrete T-beam web; 5-Concrete T-beam diaphragm; 6-Micro-expansion self-compacting concrete pouring hole; Concrete; 12-the concrete surface of the original T-beam bottom slab; 13-the portal steel bar.

[0098] The solution of the present invention is to provide a construction method for strengthening the heavy-duty railway bridge on the basis of the prior art. Plant reinforcement, inject micro-expansion self-compacting concrete between the bottom and side web of the original concrete beam and the reinforced steel plate at the same time to make the reinforced part work together with the original structure as a whole. The original concrete beam includes the existing concre...

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Abstract

The invention provides a construction method used for carrying out strengthening treatment on a heavy haul railway bridge. The construction method is characterized in that: 1} a support (2) is installed; 2) ribs are inserted on the bottom and at the side face of an original concrete beam (1); 3) a steel plate (9) is coated outside the bottom and the side face of the original concrete beam (1); 4) micro-dilatancy self-compaction concrete (11) is injected through a pouring hole (6); 5) the steel plate is coated outside a lateral partition plate (5), and meanwhile, the steel plate (9) is also coated outside the bottom so as to inject the micro-dilatancy self-compaction concrete (11); and 6) the support (2) is loosened after curing molding, thereby obtaining a steel-concrete combination beam by the injection micro-dilatancy self-compaction concrete and steel plates at the bottom and the side face. The construction method is applicable to different railways and highway bridges, and is particularly applicable to the heavy haul railway bridge.

Description

(1) Technical field [0001] The invention relates to the field of bridge engineering in civil engineering, in particular to a construction method and construction technology for reinforcing and strengthening a bridge superstructure, in particular to the rapid strengthening and upgrading of heavy-duty railway bridges. (2) Background technology [0002] In order to meet the growing transportation demand, my country's freight trains, especially coal-transporting lines, have increased the axle load of the trains from 25 tons to 30 tons. Although its strength and stiffness can meet the operational requirements, experimental studies have shown that as the frequency of the axle load increases, the concrete in the horseshoe tension area under the T-beam is prone to vertical cracks, resulting in a decrease in the crack resistance of the prestressed concrete beam, which in turn affects Bridge fatigue durability. For such strength and stiffness that can meet the requirements of the speci...

Claims

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Application Information

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IPC IPC(8): E01D22/00
Inventor 余志武李进洲谈遂宋力
Owner CENT SOUTH UNIV
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