CN113463509A

CN113463509A - Low-noise bridge polymer expansion device

Info

Publication number: CN113463509A
Application number: CN202110974175.2A
Authority: CN
Inventors: 杨锐; 桂永全
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2021-10-01
Also published as: WO2023024687A1

Abstract

The invention relates to the technical field of bridge expansion devices, in particular to a low-noise bridge polymer expansion device; the expansion device comprises an expansion device consisting of a plurality of elastic modules spanning the bridge expansion joint, wherein the elastic modules are arranged along the length direction of the bridge expansion joint; a plurality of anchoring bolt holes are formed in the two side edges, and bolts anchored with the end parts of the bridge plates are arranged in the anchoring bolt holes; the elastic module at least comprises a surface layer made of high molecular polymer elastic material and a bottom layer which is positioned on the lower end surface of the surface layer and made of the high molecular polymer elastic material; the invention can balance and give consideration to rigidity and flexibility, ensures the continuity of the road surface, can smoothly pass through the vehicle tire, has simple structure, small steel consumption, low structural height, good multidirectional deformation coordination, fatigue resistance, high-temperature stability, low-temperature crack resistance and water and seepage resistance; comfortable driving, simple and easy construction, quick installation, no vehicle jumping and low noise.

Description

Low-noise bridge polymer expansion device

Technical Field

The invention relates to the technical field of bridge expansion devices, in particular to a low-noise bridge polymer expansion device.

Background

The bridge expansion device is a seam crossing device which is arranged between connecting ends of a bridge structure and can be freely deformed, and the bridge expansion device has the function of keeping free expansion in multiple dimensional directions under the action of factors such as temperature change, concrete or steel contraction, creep displacement, dynamic load and the like, so as to adapt to various deformation of the bridge structure and be an indispensable structural device in the normal operation of a guarantee bridge.

The bridge expansion device has the functions of making the automobile run comfortably, smoothly, with low noise, water resistance and sundry infiltration resistance, and also has the advantages of durability, simple and easy installation and construction, and convenient maintenance. The material performance and the structural design of the device can directly influence the operation service quality and the service life of the bridge, and even threaten the structural safety and the driving safety of the bridge and the service life of the bridge.

At present, the large-specification expansion devices of urban elevated roads and expressways are all made of pure steel materials, and compared with softer and elastic asphalt roads, the expansion joint device is a rigid transverse zone perpendicular to the driving direction. The annoying expansion joint impact noise not only has high sound intensity, but also can be spread to a distance of several kilometers. Compared with various traffic noise sources, the expansion joint impact noise has larger influence on the life of residents nearby two sides of the urban viaduct and the expressway, and the problem of serious environmental noise pollution is often caused.

The all-steel comb tooth expansion device has overlarge rigidity, poor deflection following property and small energy damping property, and is easy to damage the expansion device and the road surface under the impact of long-term continuous wheel load. The seamless elastic asphalt expansion device and the rubber plate type mainly adopt elastic materials as displacement deformation bodies, have high requirements on the materials, can arch or sink when the elastic materials expand and contract, have short service life and limited deformation, are only suitable for bridges with small span, and are gradually eliminated, and the rubber plate type expansion device is forbidden to be used on high-grade roads by clear regulations in traffic regulations. The rigidity and flexibility of the all-steel expansion device are difficult to balance, and the flexibility of the expansion device is increased, so that the driving safety of the expansion joint cannot be ensured and the end part of a bridge member cannot be protected; increasing the rigidity of the retractor often results in fracture damage to the retractor mounting anchor.

Disclosure of Invention

The invention provides a low-noise bridge polymer expansion device, which aims to make up the defects of the prior art and solve the problems that the rigidity and the flexibility of the existing full-steel expansion device are difficult to balance and the noise pollution is large.

The technical scheme adopted by the invention for solving the technical problems is as follows: a low noise bridge polymer expansion device comprises an expansion device consisting of a plurality of elastic modules spanning a bridge expansion joint, wherein the elastic modules are arranged along the length direction of the bridge expansion joint; a plurality of anchoring bolt holes are formed in the two side edges, and bolts anchored with the end parts of the bridge plates are arranged in the anchoring bolt holes; the elastic module at least comprises a surface layer made of high molecular polymer elastic material and a bottom layer which is positioned on the lower end surface of the surface layer and made of the high molecular polymer elastic material.

When the telescopic device is used, the surface layer and the bottom layer are made of high-molecular polymer elastic materials, a rigid-flexible coupled tissue structure can be formed, the structural rigidity is high, the flexibility is realized, the large multidimensional direction deflection can be borne, the elastic module has vertical rigidity and compression deformation and can bear vertical load and adapt to the rotation of a beam end, the flexibility and the low friction resistance of the high-molecular polymer elastic materials can be utilized, the displacement of bridge members can be enabled to be easy, the telescopic device can span a bridge expansion joint gap as an integral elastic module, the continuity of the road surface is guaranteed, vehicle tires can smoothly pass through, impact load generated by driving can be effectively absorbed, and the noise of vehicles passing through the telescopic device is reduced.

Preferably, an intermediate layer made of steel plates or steel grids is arranged between the surface layer and the bottom layer. Through the setting in intermediate level, can utilize material composite construction to guarantee structural rigidity, guarantee the driving safety at bridge expansion joint and protect the bridge slab tip.

Preferably, the surface layer or/and the bottom layer is/are provided with a plurality of broken line grooves to form a spring type groove structure, and the cross section of each broken line groove is in a straight wall shape, a trapezoid shape or a stepped shape. The surface layer or/and the bottom layer is/are provided with a plurality of broken line grooves to form a spring type groove structure, and the gaps of the broken line grooves have enough space size, so that the high polymer elastic materials of the surface layer or the bottom layer on two sides of the broken line grooves generate larger displacement to form spring type deformation, and an elastic module of the expansion device cannot arch or sink, thereby achieving the use function of multidirectional displacement of the expansion joint; when the section of the broken line groove is trapezoidal, the slope of the side wall of the broken line groove has a shoveling effect, and sand in the broken line groove can be extruded out of the groove to play a self-cleaning role; during the in-service use, the broken line slot can not cut thoroughly to leave a very thin tunic at broken line slot terminal surface, consequently can play sealed effect when not influencing flexible displacement, do not let sand and rainwater permeate to the bridge underneath, reduce steel sheet or steel grating rusty probability.

Preferably, the material on the surface layer or the bottom layer between the fold line grooves forms a fold line connecting rod flexible hinge, the fold line connecting rod flexible hinge comprises at least two connecting rods which are arranged in a fold line type staggered mode, and the connecting rods are connected through the flexible hinge. Through the arrangement of the flexible hinges of the broken line connecting rods, all application scenes from microminiature to large can be adapted through the adjustment of the number of the connecting rods, and compared with the existing integral bridge expansion joint which can only be used for microminiature scenes of 80-200mm, the flexible hinge of the invention has a wider application range; meanwhile, large-deformation flexible hinged displacement is realized, a better telescopic function is realized, and the use function requirement of multidirectional displacement of the highway bridge expansion joint is met in a self-adaptive manner; in addition, in the bridge in the area with the possibility of earthquake, the bridge plates at the two sides of the expansion joint usually depend on the limit of a special earthquake-proof bridge support during the earthquake, so as to ensure that the bridge plates cannot fall off from the bridge columns. The expansion device has an anti-seismic function which cannot be achieved by other types of expansion devices, the flexible hinge of the broken line connecting rod has strong geometric deformability, loads between bridge ends can be effectively weakened to be mutually transmitted, the expansion joint is integrally spanned, and the bridge ends on two sides are flexibly connected together to form a mechanical load attenuation damper, so that the mechanical load attenuation damper has a good anti-seismic function and improves the safety of bridges.

Preferably, the surface layer, the middle layer and the bottom layer are split or integral prefabricated members.

Preferably, the intermediate layer is located at the bottom of the skin layer and covers the skin layer either completely or partially.

Preferably, the surface layer and the bottom layer are made of polyurethane elastomer, hydrogenated styrene block copolymer elastomer, modified ultrahigh molecular weight polyethylene, high density polyethylene and synthetic rubber; or the bottom layer can be made of polyurethane elastomer, hydrogenated styrene block copolymer elastomer, blend or/and copolymer of two or more of modified ultrahigh molecular weight polyethylene, high density polyethylene and synthetic rubber in any combination, and the bottom layer can also be made of polyurea, polyurethane or epoxy resin.

The invention has the following beneficial effects:

1. according to the low-noise bridge polymer expansion device, the elastomer flexible hinge integral type highway bridge expansion device realizes large-deformation variable-rigidity flexible hinge according to the composite material structure, the flexible hinge design of the broken line connecting rod, the selection of the space size of the groove and the material type, can self-adaptively meet the use function requirement of multidirectional displacement of the highway bridge expansion device, is formed into an elastic module integrally spanning an expansion joint, balances and considers rigidity and flexibility, ensures the continuity of the road surface, can smoothly pass vehicle tires, has simple structure, small steel consumption, low structure height, good multidirectional deformation coordination, fatigue resistance, high-temperature stability, low-temperature crack resistance and water and seepage resistance; the method has the advantages of comfortable driving, simple and easy construction, quick installation, no vehicle jumping and low noise; the device can adapt to the deformation of expansion joint structures with various specifications such as wide bridges, curved bridges, oblique bridges and the like in multi-dimensional directions, and when various vehicles pass through the bridge, horizontal force can be uniformly distributed, and partial vibration is absorbed, so that the service life of the bridge is prolonged.

2. According to the low-noise bridge polymer expansion device, due to the fact that the flexible hinge of the broken line connecting rod has strong geometric deformation capacity, the expansion device has an anti-seismic effect which is not possessed by other types of expansion devices, mutual load transmission between bridge ends can be effectively weakened, the expansion joint is integrally spanned, the bridge ends on two sides are flexibly connected together to form a mechanical load attenuation damper, and therefore the expansion device has a good anti-seismic function, and the safety of a bridge is improved.

3. According to the low-noise bridge polymer expansion device, the elastic module can be a split type or integral type prefabricated part, the self weight is light, the rapid pavement construction can be carried out at normal temperature, the installation and the replacement are convenient, the construction method and the technical requirements are greatly simplified, the construction efficiency is improved, and the traffic service conditions can be reached in a short time, so that the traffic can be rapidly opened, and the influence on the operation of daily traffic facilities is reduced to the minimum degree; the expansion joint is suitable for expansion joints of various specifications of large-span steel bridges and concrete bridges, and is also suitable for quick installation and maintenance engineering of expansion devices of urban elevated bridges, high-grade highways and expressways.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic cross-sectional view of an elastic module of the present invention in a two-layer composite structure;

FIG. 2 is a schematic cross-sectional view of an elastic module of the present invention having a three-layer composite structure;

FIG. 3 is another schematic cross-sectional view of the elastic module of the present invention in a three-layer composite structure;

FIG. 4 is a cross-sectional view of a straight-walled non-through broken line groove of the surface layer and the bottom layer of the elastic module of the present invention;

FIG. 5 is a cross-sectional view of trapezoidal non-through broken line grooves in the surface and bottom layers of the elastic module of the present invention;

FIG. 6 is a cross-sectional view of a stepped non-through broken line groove in the surface layer and bottom layer of an elastic module according to the present invention;

FIG. 7 is a first schematic top view of the zigzag groove of the present invention;

FIG. 8 is a second top view of the zigzag groove of the present invention;

FIG. 9 is a third schematic top view of the zigzag groove of the present invention;

FIG. 10 is a schematic top view of the arrangement of the fold line grooves and the steel plates of the present invention;

FIG. 11 is another schematic top view of the arrangement of the fold line grooves and the steel plates of the present invention;

FIG. 12 is another schematic top view of the arrangement of the fold line grooves and the steel plates of the present invention;

fig. 13 is a schematic view of the installation of the polymer telescopic device for a low noise bridge of the present invention.

In the figure:

1. a surface layer; 2. an intermediate layer; 3. a bottom layer; 4. an anchor bolt hole; 5. a broken line groove; 6. a road surface layer; 7. a telescoping device; 8. a bridge expansion joint; 9. a bridge plate end; 10. a connecting rod; 11. and (4) flexible hinges.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The first embodiment is as follows:

as shown in fig. 1 and 13, a low noise bridge polymer expansion device comprises an expansion device 7 composed of a plurality of elastic modules spanning over a bridge expansion joint 8, wherein the elastic modules are arranged along the length direction of the bridge expansion joint 8; a plurality of anchor bolt holes 4 are formed in the two side edges, and bolts anchored with the end parts 9 of the bridge plate are arranged in the anchor bolt holes 4; the elastic module at least comprises a surface layer and a bottom layer 3 below the surface layer 1, wherein the surface layer 1 and the bottom layer 3 are made of polyurethane elastomer materials.

Example two:

the same as the first embodiment, except that an intermediate layer 2 made of steel plate or steel grating is arranged between the surface layer 1 and the bottom layer 3.

Example three:

the same as the first embodiment, except that the surface layer 1 or/and the bottom layer 3 is provided with a plurality of zigzag grooves 5 to form a spring-type groove structure, and the zigzag grooves 5 have a straight wall, trapezoid or step shape in cross section.

Example four:

the same as in the first embodiment, except that the surface layer 1, the intermediate layer 2 and the bottom layer 3 are split or integral preforms.

Example five:

the difference is that the intermediate layer 2 is located at the bottom of the surface layer 1 and partially covers the surface layer 1, wherein the partially covered surface layer covers the position where the anchor bolt hole 4 is not included and/or the position where the broken line groove 5 is not included.

Example six:

the first embodiment is the same as the first embodiment, except that the material on the surface layer or the bottom layer between the zigzag grooves forms a zigzag link flexible hinge, the zigzag link flexible hinge comprises at least two connecting rods 10 which are arranged in a zigzag manner, and the connecting rods 10 are connected by a flexible hinge 11.

Example six:

the same as the first embodiment, except that the surface layer 1 and the bottom layer 3 are made of hydrogenated styrene block copolymer elastomer.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A low noise bridge polymer expansion device, characterized in that, it comprises an expansion device (7) composed of a plurality of elastic modules spanning over the bridge expansion joint (8), the elastic modules are arranged along the length direction of the bridge expansion joint (8); a plurality of anchoring bolt holes (4) are formed in the two side edges, and bolts anchored with the end parts (9) of the bridge plate are arranged in the anchoring bolt holes (4); the elastic module at least comprises a surface layer (1) made of high molecular polymer elastic material and a bottom layer (3) which is positioned on the lower end face of the surface layer (1) and made of the high molecular polymer elastic material.

2. A low noise bridge polymer expansion device according to claim 1, wherein an intermediate layer (2) made of steel plate or steel grating is arranged between the surface layer (1) and the bottom layer (3).

3. A low noise bridge polymer expansion device according to claim 2, wherein the surface layer (1) or/and the bottom layer (3) is provided with a plurality of zigzag grooves (5) to form a spring type groove structure, and the zigzag grooves (5) have a cross-sectional shape of a straight wall, a trapezoid or a step.

4. A low noise bridge polymer expansion device according to claim 3, wherein the material on the surface layer (1) or the bottom layer (3) between the broken line grooves (5) forms a broken line connecting rod flexible hinge (11), the broken line connecting rod flexible hinge (11) comprises at least two connecting rods (10) which are arranged in a zigzag manner, and the connecting rods (10) are connected through the flexible hinge (11).

5. A low noise bridge polymer expansion device according to claim 2, wherein the surface layer (1), the middle layer (2) and the bottom layer (3) are made of split or integral prefabricated parts.

6. A low noise bridge polymer expansion device according to claim 2, wherein the intermediate layer (2) is located at the bottom of the surface layer (1) and covers the surface layer (1) in its entirety or partially (1).

7. The polymer expansion device for low noise bridge according to claim 1, wherein the surface layer (1) and the bottom layer (3) are made of polyurethane elastomer, hydrogenated styrene block copolymer elastomer, modified ultra-high molecular weight polyethylene, high density polyethylene, or synthetic rubber; or a blend or/and copolymer of two or more of polyurethane elastomer, hydrogenated styrene block copolymer elastomer, modified ultra-high molecular weight polyethylene, high density polyethylene and synthetic rubber which are randomly combined is used as the material, and the bottom layer (3) can also be made of polyurea, polyurethane or epoxy resin.