CN114000424A

CN114000424A - Steel-wood combined bridge deck structure and paving method thereof

Info

Publication number: CN114000424A
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: 2022-02-01
Anticipated expiration: 2041-10-28
Also published as: ZA202208486B; CN114000424B

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 the structural design, the bridge deck has a certain buffering effect, the fatigue damage to the steel bridge deck is reduced, and the asphalt concrete is fixed through the wood lath, so that the interlayer separation caused by insufficient interlayer bonding force can be prevented; as the wood lath 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 generally applied to large and medium span bridges. However, with the construction and use of a large number of steel structure bridges, the cases of the steel bridge deck pavement system being damaged within the service life are often seen, such as cracks, wave transition, local bulges (asphalt bags, high temperature air bags), ruts, and the like. The problems not only have great influence on the driving comfort, but also easily cause traffic accidents, and cause huge social and economic losses, and because the out-of-plane rigidity of the steel bridge deck is small, 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 complicated. Under the action of high temperature and heavy vehicle load, the steel bridge deck has large local deformation, obvious stress concentration appears at the welding positions of each longitudinal stiffening rib, the diaphragm plate and the bridge deck, bridge deck deformation and fatigue damage of the welding positions are easily caused, the durability of the structure is influenced, the service life of the structure is reduced, and the safety of the structure is influenced. The main failure types at present are fatigue cracking of a steel bridge deck plate caused by shear deformation under the repeated action of vehicle load and interlayer separation caused by insufficient interlayer bonding force under high-temperature driving.

Disclosure of Invention

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

Technical scheme

The utility model provides a steel-wood composite bridge deck structure, includes steel decking, and steel decking's bottom equipartition is fixed with a plurality of U rib, and adjacent U rib is one section distance setting in interval, and steel decking's upper surface still equipartition is fixed with a plurality of lath, and adjacent lath is one section distance setting in interval, and asphalt concrete has all been mated formation between the adjacent lath and to the upside.

Further, the mounting hole has all vertically been seted up with the steel bridge panel to the batten, and the batten is fixed through the mounting hole with the steel bridge panel through the inflation screw, and the inflation end of inflation screw is located the lower extreme of inflation screw. Further, the wood lath and the U-shaped rib are arranged in a vertical direction in a plan view.

Furthermore, the wood lath is made of orthogonal laminated wood and is subjected to antiseptic treatment.

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

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

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

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

A method for paving a steel-wood combined bridge deck structure comprises the steps of prefabricating a steel bridge deck slab, wood battens and U ribs in a factory, performing anticorrosion treatment on the wood battens, paving the steel bridge deck slab on the site, uniformly coating inorganic zinc-rich primer on the upper surface and the lower surface of the steel bridge deck slab, arranging the wood battens on the steel bridge deck slab at intervals, aligning the wood battens with mounting holes formed in the steel bridge deck slab, fixing the wood battens with the steel bridge deck slab by using expansion screws, paving a layer of asphalt concrete at a gap between every two adjacent wood battens, and paving a layer of asphalt concrete above the first layer of asphalt concrete and the wood battens again after paving is finished, namely finishing the steel-wood combined bridge deck structure.

The advantages and effects are as follows:

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

2. According to the invention, through the structural design, as the wood lath 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.

Drawings

The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.

FIG. 1 is a partially sectioned structural schematic diagram of an overall structure of a steel-wood composite bridge deck;

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

FIG. 3 is a schematic structural view before asphalt concrete is paved;

FIG. 4 is a plan view of a structure in which asphalt concrete coats a form strip;

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

fig. 6 is a schematic structural view of the expansion screw fixing wood lath and the steel bridge deck.

Description of reference numerals: 1. the concrete slab comprises wood laths, 2 asphalt concrete, 3 steel bridge decks, 4U ribs and 5 expansion screws.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5 and 6, a steel-wood composite 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 laths 1 are uniformly distributed and fixed on the upper surface of the steel bridge deck 3, the wood laths 1 are made of orthogonal laminated wood, and the wood laths 1 are subjected to anticorrosion treatment, preferably treatment standard LY/T3228-2020 pressurized anticorrosion treated laminated wood. The adjacent wood laths 1 are arranged at intervals, and the distance between every two adjacent wood laths 1 is 500 +/-10 mm. The wood lath 1 is made of cross 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 adhesion between the wood lath 1 and the asphalt concrete 2 can be fully guaranteed through the design of the size and the interval. The wooden lath 1 can meet the strength requirement of vehicle load, and has the function of buffering certain vibration, because the diseases of the orthotropic bridge deck are all fatigue failures, the fatigue failures are mainly vibration amplitudes, the elastic modulus of the wood is small, the wood can be effectively buffered, and meanwhile, the wood is still in the elastic range. The mounting hole has been seted up with equal vertical to batten 1 and steel decking 3, and batten 1 runs through the mounting hole through inflation screw 5 with steel decking 3 fixed, has simple to operate, and the difficult not hard up benefit, and the inflation end of inflation screw 5 is located the lower extreme of inflation screw 5. The batten 1 and the U-rib 4 are arranged in a vertical direction in plan view. Between the adjacent plank 1 and the upside all paved asphalt concrete 2, can prevent it because the not enough interlaminar that arouses of adhesive force breaks away from between the layer, the asphalt concrete 2 thickness of paving above the plank 1 is 10 + -3 mm, then can calculate the asphalt concrete 2 thickness of paving above the steel bridge deck slab 3 between the adjacent plank 1 and be 60 + -5 mm, such thickness setting can be used to resist wearing and tearing and the shear force that the vehicle load produced to bridge deck pavement, provide the required roughness of driving a vehicle, and can be firm fixed and protect plank 1, asphalt concrete 2's intensity has still been guaranteed simultaneously, the total weight of bridge construction has also effectually been controlled. The batten 1 is surrounded by the asphalt concrete 2 and the steel bridge deck 3, so that erosion 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 shear deformation of a traditional road surface paved by only adopting the mixture of asphalt and concrete due to braking on a vehicle can be effectively reduced, and the wood serving as the relatively flexible material can absorb part of the shear deformation.

The paving method of the steel-wood combined bridge deck structure comprises the following steps: firstly, prefabricating a steel bridge deck 3, wood battens 1 and U-shaped ribs 4 in a factory, performing anticorrosion treatment on the wood battens 1, then 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, then arranging the wood battens 1 on the steel bridge deck 3 at intervals, aligning the wood battens 1 with mounting holes formed in the steel bridge deck 3, fixing the wood battens 1 with the steel bridge deck 3 by using expansion screws 5, paving a layer of asphalt concrete 2 at a gap position between every two adjacent wood battens 1, and paving a layer of asphalt concrete 2 again above the first layer of asphalt concrete 2 and the wood battens 1 after paving is finished, namely completing paving of a steel-wood combined bridge deck structure.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that various changes and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and obvious changes and modifications included in the technical solutions of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a steel wood combination bridge floor structure which characterized in that: including steel decking (3), the bottom equipartition of steel decking (3) is fixed with a plurality of U rib (4), and adjacent U rib (4) set up for one section distance in interval, and the upper surface of steel decking (3) still equipartition is fixed with a plurality of lath (1), and adjacent lath (1) are set up for one section distance in interval, and asphalt concrete (2) have all been laid to between adjacent lath (1) and the upside.

2. The steel-wood composite bridge deck structure according to claim 1, wherein: the mounting holes are vertically formed in the batten (1) and the steel bridge deck (3), the batten (1) and the steel bridge deck (3) are fixed by penetrating through the mounting holes through expansion screws (5), and expansion ends of the expansion screws (5) are located at the lower ends of the expansion screws (5).

3. The steel-wood composite bridge deck structure according to claim 1, wherein: the wood lath (1) and the U-shaped rib (4) are arranged in a vertical direction in a overlooking mode.

4. The steel-wood composite bridge deck structure according to claim 1, wherein: the wood lath (1) is made of orthogonal laminated wood, and the wood lath (1) is subjected to antiseptic treatment.

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

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

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

9. A paving method of the steel-wood composite bridge deck structure according to claim 1, wherein the paving method comprises the following steps: firstly, prefabricating a steel bridge deck (3), wood battens (1) and U-shaped ribs (4) in a factory, performing anticorrosive treatment on the wood battens (1), then 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), then arranging the wood battens (1) on the steel bridge deck (3) at intervals, aligning the wood battens (1) with mounting holes formed in the steel bridge deck (3), fixing the wood battens (1) and the steel bridge deck (3) by using expansion screws (5), paving a layer of asphalt concrete (2) at a gap position between every two adjacent wood battens (1), paving a layer of asphalt concrete (2) above the first layer of asphalt concrete (2) and the wood battens (1) again after the bridge deck is finished, and finishing paving the steel-wood combined structure.