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Combined Steel Bridge Deck Pavement Method

A combined, steel bridge deck technology, applied in the direction of bridges, bridge construction, bridge parts, etc., can solve the problems of large deformation of the steel bridge deck system, poor durability of interlayer bonding, hidden dangers, etc., to achieve strong deformation resistance, deformation The effect of large space and strong shear resistance

Active Publication Date: 2020-12-08
广州珠江黄埔大桥建设有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the technical indicators of the aggregate, the construction site usually checks the physical indicators according to the relevant technical indicators of the "Highway Engineering Aggregate Test Regulations", and the adhesion to the epoxy asphalt binder can also be controlled according to the ordinary asphalt index (≥4). It is difficult for epoxy asphalt mixture to really meet the requirements; at the same time, there will be insufficient or unstable supply of material sources on site, resulting in large changes in the field use and testing of aggregates. Carry out system testing and rush construction
For the selection of slag powder, the physical indicators such as its fineness and hydrophobicity are mainly considered, and it is sufficient not to contain active lime, but there is no additional requirement for harmful impurities in it. If the slag powder is doped with metal minerals, it may be damaged by electrochemical reactions. Cause corrosion, weaken the integrity of the pavement structure, waterproof effect, and bring potential hidden dangers
In the existing single-layer crushed stone structure, the surface of the crushed stone cannot be completely covered by resin, the deformation of the steel bridge deck system is large, and the adhesion of the steel plate on the bridge deck is low. Insufficient, the durability of interlayer bonding is poor, which will cause delamination and slippage between the pavement layer and the bridge deck steel plate and damage it. In the presence of water, the steel plate will be corroded, which is extremely detrimental to the durability and safety of the bridge. Long-term practice has proved that , the bonding and protection between the bridge deck pavement and the bridge deck steel plate play a vital role in the success of the entire steel bridge deck pavement

Method used

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  • Combined Steel Bridge Deck Pavement Method
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  • Combined Steel Bridge Deck Pavement Method

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Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. And the features in the embodiments can be combined with each other.

[0029] like figure 1 As shown, a combined steel bridge deck pavement method comprises the following steps:

[0030] A. Laying modified epoxy resin crushed stone combined connection layer:

[0031] ①Sandblasting and shot blasting to Sa2.5 on the surface of steel plate 1 on the steel bridge deck, removing dust, drying and pollution-free;

[0032] ②According to the ratio of 1:1, take A and B components of the modified epoxy resin and pour them into a clean container, stir until the liquid is mixed to a uniform state, the stirring time should not be less than 3min, and the modified epoxy resin mixed in proportion Oxygen resin according to the set dosage 1....

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Abstract

The invention discloses a combined-type steel bridge deck laying method. The combined-type steel bridge deck laying method comprises the following steps that A, a modified epoxy resin and gravel combined-type connection layer is laid, specifically, the surface of a steel plate of a steel bridge deck is subjected to sandblasting shot blasting, modified epoxy resin is laid and smeared on the surfaceof the steel plate to form a first modified epoxy resin layer, gravel is scattered on the surface of the first modified epoxy resin layer to form a first gravel layer, modified epoxy resin is evenlylaid and smeared on the surface of the first gravel layer according to the set dosage to form a second modified epoxy resin layer, and then gravel is scattered to form a second gravel layer; and B, ultra-high performance pavement is laid, specifically, active epoxy asphalt or high-viscosity modified emulsified asphalt is smeared on the surface of the connection layer to form a first waterproof bonding layer, then a stone mixture is laid and smeared to form a waterproof-type structure layer, and finally integrated spreading of a second waterproof bonding layer and a drainage-type abrasion layeris conducted through special equipment. According to the combined-type steel bridge deck laying method, sliding and delaminating between the structural layers are prevented, and the stability and durability of the structure are guaranteed.

Description

technical field [0001] The invention relates to a construction method for a bridge with a cable load-bearing structure, in particular to a method for paving a combined steel bridge deck of a bridge with a large-span cable load-bearing structure. Background technique [0002] In the past two decades, many long-span cable-bearing structure bridges have been built in my country. The main girder structure basically adopts orthotropic steel panels and thin-layer pavement to form the bridge train structure. The orthotropic steel deck structure is composed of transverse diaphragms, longitudinal stiffeners and decks supported by them. The elastic properties of the bridge deck structure are different in the transverse and longitudinal directions, and the stiffness of the bridge deck is also different in different positions in the same direction. These factors The inhomogeneity of the stiffness and deformation of the orthotropic steel bridge deck is formed. In addition, because the sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 张少锦刘先淼邓志华王勇
Owner 广州珠江黄埔大桥建设有限公司
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