CN114000424B

CN114000424B - Steel-wood combined bridge deck structure and paving method thereof

Info

Publication number: CN114000424B
Application number: CN202111266307.2A
Authority: CN
Inventors: 刘朋; 陈艺旋; 赵健; 安路明; 任延龙; 王元清
Original assignee: Shenyang University of Technology; China Railway Construction Bridge Engineering Bureau Group South Engineering Co Ltd
Current assignee: Shenyang University of Technology; China Railway Construction Bridge Engineering Bureau Group South Engineering Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2023-08-18
Anticipated expiration: 2041-10-28
Also published as: CN114000424A; ZA202208486B

Abstract

The invention belongs to the technical field of bridge engineering, and relates to a steel-wood combined bridge deck structure and a paving method thereof. According to the invention, through structural design, the bridge deck has a certain buffer effect, fatigue damage to the steel bridge deck is reduced, and asphalt concrete is fixed through the wood lath, so that interlayer separation caused by insufficient interlayer adhesive force can be prevented; because the wood strip is used as a relatively flexible material, a part of shear deformation can be absorbed, and the shear deformation of the bridge deck caused by vehicle braking can be effectively reduced.

Description

Steel-wood combined bridge deck structure and paving method thereof

Technical Field

The invention belongs to the technical field of bridge engineering, and relates to a steel-wood combined bridge deck structure and a paving method thereof.

Background

The steel bridge deck has the advantages of strong bearing capacity, short construction period and the like, and is widely applied to large and medium-span bridges. However, with the construction and the use of a large number of steel structure bridges, the situation that the steel bridge deck pavement system is damaged in the service life is also frequent, such as cracks, wave pushing, local bulges (asphalt bags, high-temperature air bags), ruts and the like. The problems have great influence on the driving comfort level, and meanwhile, traffic accidents are easy to cause, so that huge social and economic losses are caused, and the deformation and stress under the influence of external factors such as bridge structure deformation and temperature change, vehicle load, earthquake and the like are very complex due to the fact that the out-of-plane rigidity of the steel bridge deck is small. Under the high temperature and heavy vehicle load effect, the local deformation of steel bridge deck is big, is located each vertical stiffening rib, diaphragm and deck welding department and appears obvious stress concentration, causes bridge floor deformation and welding position fatigue damage easily, influences structural durability, reduces the life of structure, influences structural security. The main damage type at present is interlayer separation caused by insufficient interlayer bonding force under high-temperature driving and fatigue cracking of a steel bridge deck caused by shearing deformation under repeated action of vehicle load.

Disclosure of Invention

The invention aims to provide a steel-wood combined bridge deck structure and a paving method thereof, which fully exert the performance advantages of steel and wood, so as to reduce the fatigue damage problem of a steel bridge deck in the prior art and prolong the service life of the bridge deck.

Technical proposal

The utility model provides a steel wood combination bridge deck structure, includes the steel bridge deck, and the bottom equipartition of steel bridge deck is fixed with a plurality of U rib, and adjacent U rib is the interval one section distance setting, and the upper surface of steel bridge deck still equipartition is fixed with a plurality of batten, and adjacent batten is the interval one section distance setting, has all mated formation asphalt concrete between the adjacent batten and the upside.

Further, the wood lath and the steel bridge deck plate are vertically provided with mounting holes, the wood lath and the steel bridge deck plate are fixed through the mounting holes by expansion screws, and the expansion ends of the expansion screws are positioned at the lower ends of the expansion screws. Further, the wood strip and the U-shaped ribs are arranged in the vertical direction when overlooking.

Further, the wood strip is made of orthogonal glued wood, and the wood strip is subjected to corrosion prevention treatment.

Further, the distance between two adjacent wood strips is 500+/-10 mm.

Further, the wood lath is orthogonal laminated wood (CLT), the thickness of the wood lath is 50+/-2 mm, and the width of the wood lath is 600-1200mm.

Further, the thickness of asphalt concrete paved above the wood lath is 10+/-3 mm.

Further, the upper and lower surfaces of the steel bridge deck are uniformly coated with inorganic zinc-rich primer.

A paving method of a steel-wood combined bridge deck structure comprises the steps of prefabricating a steel bridge deck plate, wood strips and U ribs in a factory, carrying out anti-corrosion treatment on the wood strips, paving the steel bridge deck plate on site, uniformly brushing inorganic zinc-rich primer on the upper surface and the lower surface of the steel bridge deck plate, arranging the wood strips on the steel bridge deck plate at intervals, aligning the wood strips with mounting holes formed in the steel bridge deck plate, fixing the wood strips with the steel bridge deck plate by using expansion screws, paving a layer of asphalt concrete at a gap position between two adjacent wood strips, paving a layer of asphalt concrete above the first layer of asphalt concrete and the wood strips again after paving is completed, and thus finishing paving the steel-wood combined bridge deck structure.

The advantages and effects:

1. according to the invention, through structural design, the bridge deck has a certain buffer effect, fatigue damage to the steel bridge deck is reduced, and asphalt concrete is fixed through the wood lath, so that interlayer separation caused by insufficient interlayer bonding force can be prevented.

2. According to the invention, due to structural design, the wood battens are used as relatively flexible materials, so that a part of shear deformation can be absorbed, and the shear deformation of the bridge deck caused by vehicle braking can be effectively reduced.

Drawings

The invention is further described below with reference to the drawings and the detailed description. The scope of the present invention is not limited to the following description.

FIG. 1 is a schematic view of a steel-wood combined bridge deck with an integral structure partially broken away;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic diagram of the structure prior to asphalt concrete pavement;

FIG. 4 is a plan view of a construction in which asphalt concrete encapsulates formwork strips;

FIG. 5 is a schematic view of an expansion screw structure;

fig. 6 is a schematic view of the construction of expansion screw fixed wooden planks and steel bridge deck.

Reference numerals illustrate: 1. wood lath, asphalt concrete, steel bridge deck, 4.U rib, expansion screw.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, a steel-wood combined bridge deck structure comprises a steel bridge deck 3, a plurality of U ribs 4 are uniformly distributed and fixed at the bottom end of the steel bridge deck 3, adjacent U ribs 4 are arranged at intervals, inorganic zinc-rich primer is uniformly coated on the upper surface and the lower surface of the steel bridge deck 3, a plurality of wood strips 1 are uniformly distributed and fixed on the upper surface of the steel bridge deck 3, the wood strips 1 are made of orthogonal laminated wood, and the wood strips 1 are subjected to corrosion prevention treatment, preferably a standard LY/T3228-2020 "pressure corrosion prevention treatment laminated wood". The adjacent wood strips 1 are arranged at intervals, and the distance between two adjacent wood strips 1 is 500+/-10 mm. The wood lath 1 is made of orthogonal laminated wood (CLT), the thickness of the wood lath 1 is 50+/-2 mm, the width of the wood lath 1 is 600-1200mm, and the adhesiveness of the designed wood lath 1 and the asphalt concrete 2 with the size and the interval can be fully ensured. The wooden lath 1 can meet the strength requirement of vehicle load, and meanwhile has the function of buffering certain vibration, because orthotropic bridge deck diseases are all fatigue damage, the fatigue damage is mainly vibration amplitude, the elastic modulus of the wood is small, the wood can be effectively buffered, and meanwhile, the wood is in an elastic range. The wood lath 1 and the steel bridge deck plate 3 are vertically provided with mounting holes, the wood lath 1 and the steel bridge deck plate 3 penetrate through the mounting holes through the expansion screws 5 to be fixed, the mounting is convenient, the loosening is difficult, and the expansion ends of the expansion screws 5 are located at the lower ends of the expansion screws 5. The wood strip 1 and the U-shaped rib 4 are arranged in a vertical direction in a plane view. Asphalt concrete 2 is paved between the adjacent wood strips 1 and on the upper side, interlayer separation caused by insufficient interlayer bonding force can be prevented, the thickness of the asphalt concrete 2 paved above the wood strips 1 is 10+/-3 mm, the thickness of the asphalt concrete 2 paved above the steel bridge deck 3 between the adjacent wood strips 1 can be calculated to be 60+/-5 mm, the thickness can be used for resisting abrasion and shearing force generated by vehicle load to bridge deck pavement, the roughness required by driving is provided, the wood strips 1 can be firmly fixed and protected, meanwhile, the strength of the asphalt concrete 2 is also ensured, and the total weight of the bridge structure is also effectively controlled. The wood lath 1 is surrounded by the asphalt concrete 2 and the steel bridge deck 3, so that the corrosion of external rainwater, illumination and the like can not be absorbed, and the service life is greatly prolonged. The rigid and flexible materials are arranged at intervals, so that the shearing deformation of the traditional pavement paved by only adopting the mixture of asphalt and concrete in a vehicle due to braking can be effectively reduced, and because the wood is used as a relatively flexible material, a part of shearing deformation can be absorbed.

The paving method of the steel-wood combined bridge deck structure comprises the following steps: firstly prefabricating a steel bridge deck 3, wood strips 1 and U ribs 4 in a factory, carrying out anti-corrosion treatment on the wood strips 1, paving the steel bridge deck 3 on site, uniformly coating inorganic zinc-rich primer on the upper surface and the lower surface of the steel bridge deck 3, arranging the wood strips 1 on the steel bridge deck 3 at intervals, aligning the wood strips 1 with mounting holes formed in the steel bridge deck 3, fixing the wood strips 1 with the steel bridge deck 3 by using expansion screws 5, paving a layer of asphalt concrete 2 at a gap position between two adjacent wood strips 1, paving a layer of asphalt concrete 2 again above the first layer of asphalt concrete 2 and the wood strips 1 after paving is finished, and thus finishing paving the steel-wood combined bridge deck structure.

It should be understood that the foregoing embodiments of the present invention are merely illustrative of the present invention and not limiting, and that various other changes and modifications can be made by one skilled in the art based on the above description, and it is not intended to be exhaustive of all embodiments, and all obvious changes and modifications that come within the spirit of the invention are desired to be protected.

Claims

1. A steel-wood combined bridge deck structure is characterized in that: including steel bridge deck (3), the bottom equipartition of steel bridge deck (3) is fixed with a plurality of U rib (4), and adjacent U rib (4) are interval one section distance setting, and the upper surface of steel bridge deck (3) still equipartition is fixed with a plurality of batten (1), and adjacent batten (1) are interval one section distance setting, have all been mated formation asphalt concrete (2) between adjacent batten (1) and the upside.

2. The steel-wood composite deck structure of claim 1, wherein: the wood lath (1) and the steel bridge deck plate (3) are vertically provided with mounting holes, the wood lath (1) and the steel bridge deck plate (3) are fixed through the mounting holes through expansion screws (5), and the expansion ends of the expansion screws (5) are located at the lower ends of the expansion screws (5).

3. The steel-wood composite deck structure of claim 1, wherein: the wood strip (1) and the U-shaped ribs (4) are arranged in the vertical direction when overlooked.

4. The steel-wood composite deck structure of claim 1, wherein: the wood lath (1) is made of orthogonal glued wood, and the wood lath (1) is subjected to corrosion prevention treatment.

5. The steel-wood composite deck structure of claim 1, wherein: the distance between two adjacent wood strips (1) is 500+/-10 mm.

6. A steel wood composite deck structure according to claim 1 or 5, wherein: the wood strip (1) is made of orthogonal glued wood, the thickness of the wood strip (1) is 50+/-2 mm, and the width of the wood strip is 600-1200mm.

7. The steel-wood composite deck structure of claim 1, wherein: the thickness of the asphalt concrete (2) paved above the wood lath (1) is 10+/-3 mm.

8. The steel-wood composite deck structure of claim 1, wherein: the upper and lower surfaces of the steel bridge deck plate (3) are uniformly coated with inorganic zinc-rich primer.

9. A method of paving a steel-wood composite deck structure according to claim 1, wherein: firstly, prefabricating a steel bridge deck (3), wood strips (1) and U ribs (4) in a factory, carrying out anti-corrosion treatment on the wood strips (1), paving the steel bridge deck (3) on site, uniformly brushing inorganic zinc-rich primer on the upper surface and the lower surface of the steel bridge deck (3), arranging the wood strips (1) on the steel bridge deck (3) at intervals, aligning the wood strips (1) with mounting holes formed in the steel bridge deck (3), fixing the wood strips (1) with the steel bridge deck (3) by using expansion screws (5), paving one layer of asphalt concrete (2) at a gap position between two adjacent wood strips (1), and paving one layer of asphalt concrete (2) above the first layer of asphalt concrete (2) and the wood strips (1) again after paving, thereby finishing paving the steel-wood combined bridge deck structure.