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Pavement structure for orthotropic steel bridge deck plate reinforcing and construction method

A steel bridge deck, orthotropic technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problems of bridge deck pavement diseases, fatigue cracking of orthotropic steel bridge decks, etc., to prolong the service life and ensure the road surface. The effect of using performance and improving overall stiffness

Pending Publication Date: 2019-03-12
中南安全环境技术研究院股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent of this invention aims at the problems that the old steel box girder bridge is prone to fatigue cracking of the orthotropic steel bridge deck and the deck pavement disease, and adopts a new type of resin asphalt pavement structure system, which can ensure that the performance of the bridge deck pavement meets the specification requirements. At the same time, improve the stiffness (dynamic modulus) of the pavement structure, reduce the fatigue damage of the steel bridge deck caused by the vehicle load, and prolong the service life of the orthotropic steel bridge deck

Method used

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  • Pavement structure for orthotropic steel bridge deck plate reinforcing and construction method
  • Pavement structure for orthotropic steel bridge deck plate reinforcing and construction method
  • Pavement structure for orthotropic steel bridge deck plate reinforcing and construction method

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Embodiment 1

[0035] Such as figure 1As shown, a pavement structure used for reinforcement of orthotropic steel bridge decks, on the surface of the bridge deck steel plate 1, the resin asphalt waterproof and anti-skid adhesive layer, the first resin asphalt adhesive layer 4 are laid sequentially from bottom to top , resin asphalt concrete lower layer 5, resin asphalt waterproof adhesive layer, second resin asphalt adhesive layer 8, resin asphalt concrete upper layer 9, resin asphalt anti-slip overlay; the resin asphalt waterproof and anti-slip adhesive layer It is composed of the first resin asphalt binder 2 spread on the surface of the bridge deck steel plate and the first crushed stone 3 that is densely and evenly spread and embedded in the lower surface of the lower surface of the resin asphalt concrete layer; the resin asphalt waterproof adhesive layer It is composed of the second resin asphalt binder 6 and the second crushed stone material 7 densely and evenly spread and embedded in th...

Embodiment 2

[0041] For the construction method of embodiment one orthotropic steel bridge deck reinforced pavement structure, the specific steps are as follows:

[0042] ① First, mill the asphalt concrete of the old bridge deck, and sandblast and derust the surface of the bridge deck steel plate 1, requiring the cleanliness to reach Sa2.5 level and the roughness to reach 120 μm.

[0043] ②Spray a layer of 1.1kg / m within one hour after the sandblasting and derusting treatment of bridge deck steel plate 1 2 The first resinous asphalt binder 2.

[0044] ③ The 3-5mm diabase / basalt gravel that is evenly spread immediately after the first resin asphalt binder 2 is sprayed is the first crushed stone material 3, and the amount of crushed stone is 3.5kg / ㎡.

[0045] ④ After the first resin asphalt binder 2 is cured for two days, apply 0.5 kg / m2 resin asphalt binder to form the first resin asphalt binder layer 4 .

[0046] ⑤Pave a 3.5cm thick layer of resin asphalt concrete lower layer 5, this lay...

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Abstract

The invention discloses a pavement structure for orthotropic steel bridge deck plate reinforcing and a construction method. The pavement structure comprises a resin-asphalt waterproof anti-sliding binding layer, a first resin-asphalt binder layer, a resin-asphalt concrete lower surface layer, a resin-asphalt waterproof binding layer, a second resin-asphalt binder layer, a resin-asphalt concrete upper surface layer and a resin-asphalt anti-sliding cover surface layer which are sequentially paved on a surface layer of a steel bridge deck plate from bottom to top. The pavement structure is constructed at the normal temperature, and the using performance of old bridge deck pavement can be guaranteed; by improving the bridge deck pavement rigidity, fatigue damage of a vehicle load to the steelbridge deck plate is reduced, and the service life of the orthotropic steel bridge deck plate is prolonged.

Description

technical field [0001] The invention relates to a pavement structure and a construction method for reinforcing orthotropic steel bridge decks. The pavement structure can ensure the performance of the pavement of the old bridge deck and at the same time increase the rigidity of the bridge deck pavement and reduce the Fatigue damage of steel bridge decks under vehicle loads, prolonging service life of orthotropic steel decks. Background technique [0002] Most of the long-span steel box girder cable-stayed bridges and suspension bridges designed and built in my country in the early stage used orthotropic steel bridge decks. There are three types of cast asphalt concrete technology. With the increase of service time, many bridge steel box girder orthotropic slabs at home and abroad have serious fatigue cracking and bridge deck pavement damage. [0003] Fatigue cracking of orthotropic steel decks of existing bridges is mainly due to the following reasons: First, in early-built ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/12E01D21/00
CPCE01D19/125E01D21/00
Inventor 张厚记宗炜成猛区桦张志宏卢天翔陈忠华卓武极郭洪军韩文生
Owner 中南安全环境技术研究院股份有限公司
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