WO2021212590A1

WO2021212590A1 - Novel bridge expansion joint structure

Info

Publication number: WO2021212590A1
Application number: PCT/CN2020/092051
Authority: WO
Inventors: 刘西平; 邹诚杰
Original assignee: 昆山顶牛市政建设有限公司
Priority date: 2020-04-23
Filing date: 2020-05-25
Publication date: 2021-10-28
Also published as: AU2020102290A4; CN212742182U

Abstract

A bridge expansion joint structure. The expansion joint is provided with an expansion device (1); the expansion device (1) comprises a cover plate (2) and section steel; the section steel comprises left section steel (31) and right section steel (32) provided on two sides of the expansion joint; the cover plate (2) is detachably connected to the section steel; the cover plate (2) comprises an upper cover plate (21) and a lower cover plate (22); the left section steel (31) and the right section steel (32) are respectively provided with a plurality of first shackles (311) and second shackles (321) arranged at equal intervals; the lower cover plate (22) is provided with a plurality of first hooks (221) and second hooks (222) corresponding to the first shackles (311) and the second shackles (321), respectively; the first hooks (221) and the second hooks (222) are respectively slidably connected to the lower cover plate (22); and a plurality of compression springs (4) are provided under the cover plate (2).

Description

New bridge expansion joint structure

Technical field

The utility model belongs to the technical field of bridge engineering, and specifically relates to a novel bridge expansion joint structure.

Background technique

With the continuous development of society and the rapid development of China's economy, the road, as the lifeblood of the country, has also achieved unprecedented development. Expansion joints are set at the joints of the bridge and the joints of the roads at both ends to meet the requirements of bridge deck deformation. Expansion joints are usually set between the two beam ends, between the beam ends and the abutment, or at the hinged position of the bridge. Expansion joints are required to be able to expand and contract freely in two directions parallel and perpendicular to the axis of the bridge. They should be firm and reliable. Vehicles should run smoothly, without sudden jumps and noise; installation, inspection, maintenance, and dirt removal should be simple and convenient. Once the bridge expansion joint is damaged, it will seriously affect the speed, comfort and safety of driving, and even cause driving safety accidents.

However, the structure of the current bridge expansion joints is not strong enough, and there are potential safety hazards when vehicles pass by for a long time. Moreover, the joints of the current expansion joints are simply connected by steel plates, and this construction method is often made of steel plates directly in order to save trouble. Fixed connection, that is, non-detachable connection. In daily use, the expansion joints cannot be routinely inspected and maintained, which poses a safety hazard; and because the steel plate is relatively hard, the expansion joints connected by the steel plate have poor driving comfort, and the driving process Vehicle jumping is prone to occur in the medium, so it is of practical significance to design an expansion joint structure that has good bearing capacity, good stability, and meets the expansion and contraction deformation of the bridge.

Utility model content

The main technical problem solved by the utility model is to provide a new type of bridge expansion joint structure to meet the requirements of road expansion and deformation. The structure is stable, the bearing capacity is good, and the driving process is smooth and comfortable; at the same time, installation, inspection, and maintenance are simple and convenient. .

In order to solve the above technical problems, a technical solution adopted by the present utility model is: a new type of bridge expansion joint structure, including expansion joints, the expansion joints are provided with expansion devices, the expansion devices include a cover plate and section steel, the section steel It comprises a left-side section steel and a right-side section steel arranged on both sides of the expansion joint, the cover plate is arranged above the expansion joint, and the cover plate is flush with the bridge deck;

The cover plate is detachably connected to the section steel, the cover plate includes an upper cover plate and a lower cover plate, the upper cover plate is arranged above the lower cover plate, and the upper cover plate and the lower cover plate can be Disassembly and connection; the left side section steel and the right side section steel are respectively provided with a number of first shackles and second shackles arranged at equal intervals, and the lower cover plate is provided with a number of first shackles and second shackles Corresponding first hook and second hook; the first hook and the second hook are respectively slidably connected to the lower cover plate; the right side wall of the left side section steel and the left side wall of the right side section steel respectively There are a number of first long holes and second long holes into which the first hook and the second hook extend. The first long holes correspond to the first hook and loop one by one, and the second long holes are The second shackles are in one-to-one correspondence;

A number of pressing springs are arranged under the cover plate.

Further, the specific structure for realizing the sliding connection of the first hook and the second hook is as follows: the lower cover is provided with a sliding groove, the sliding groove is provided with a sliding rail, and the top end of the first hook and The top ends of the second hooks are respectively provided with sliding blocks, and the sliding blocks are sleeved on the sliding rail and can slide along the sliding rail.

Furthermore, a first compression spring is provided between the first hook and the sliding groove; a second compression spring is provided between the second hook and the sliding groove.

Further, the left side section steel and the right side section steel are both rectangular steels, the first hook is fixedly connected to the left inner wall of the left side section steel, and the second hook is fixedly connected to the right side of the right side section steel. Inner wall.

Furthermore, the first section steel and the second section steel are respectively welded to the steel bars of the bridge.

Furthermore, elastic filling materials are filled between the lower cover plate, the first section steel, and the second section steel.

Furthermore, the elastic filling material is polyurethane sealant, silicone sealant or polysulfide sealant.

The beneficial effects of the utility model have at least the following points:

The utility model first installs the left side section steel and the right side section steel on both sides of the expansion joint and welds with the steel bars of the bridge, and then covers the lower cover plate on the upper end of the expansion joint, and presses the lower cover plate to simultaneously squeeze the first compression spring and The second squeeze spring pushes the first hook and the second hook to both sides, and then releases the lower cover. The lower cover drives the first hook and the second hook to rise under the force of the pressing spring, and wait for the pressing spring to return to normal , Loosen the first compression spring and the second compression spring. At this time, the first hook and the second hook hook the hanging ring and deform the expansion joint under the action of the first compression spring and the second compression spring. Responding to reactions, avoiding hidden dangers caused by expansion joint cracks, stable structure, good bearing capacity, and finally covered with a cover plate; the utility model is convenient to install and convenient to maintain;

The good thing is that there is a pressing spring under the cover, which not only has good bearing capacity, but also can properly absorb shocks. There will be no bumps during driving and increase the smooth driving comfort. The cover is detachably connected to the first and second steel sections. , To facilitate inspection and maintenance;

More preferably, an elastic filling material is filled between the first section steel and the second section steel, and the elastic filling material is one of polyurethane sealant, silicone sealant and polysulfide sealant, which meets the needs of the expansion and deformation of the bridge body. It also improves the life of bridge expansion joints, reduces the difficulty of maintenance of bridge expansion joints, shortens the construction period, and reduces daily maintenance and cleaning work; in addition, the elastic filling material has a good damping and vibration reduction function, which effectively improves the stability of the road surface. Reduce the impact of vehicle jumping, thereby increasing the life of the bridge; at the same time, for the damaged sealing rubber belt during maintenance, it is not necessary to replace the elastic filling material directly.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the utility model (not fully installed state);

Figure 2 is an enlarged view of A1 in Figure 1;

Fig. 3 is a schematic diagram of the structure in the direction A-A in Fig. 1;

Figure 4 is an enlarged view of A2 in Figure 3;

Figure 5 is a schematic view of the structure of the left side section of the utility model;

Fig. 6 is a schematic diagram of the structure in the direction B-B in Fig. 5;

Fig. 7 is a schematic diagram of the structure in the direction C-C in Fig. 5;

The parts in the drawings are marked as follows:

Telescopic device 1, cover 2, upper cover 21, lower cover 22, first hook 221, second hook 222, sliding groove 23, sliding rail 231, sliding block 232, first compression spring 233, second compression Compression spring 234, left section steel 31, first shackle 311, first long hole 312, right section steel 32, second shackle 321, second long hole 322, and pressing spring 4.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer and clearer definition of the scope of protection of the utility model. .

Example: A new type of bridge expansion joint structure, as shown in Figures 1 to 7, including expansion joints, the expansion joints are provided with an expansion device 1, the expansion device includes a cover plate 2 and section steel, the section steel includes the expansion joint The left section steel 31 and the right section steel 32 on both sides of the seam, the cover plate is arranged above the expansion joint, and the cover plate is flush with the bridge deck;

The cover plate is detachably connected to the section steel, the cover plate includes an upper cover plate 21 and a lower cover plate 22, the upper cover plate is arranged above the lower cover plate, the upper cover plate and the lower cover plate The plate can be detachably connected. When installing, the upper cover plate is directly covered above the lower cover plate; inside the left section steel is provided with a number of first shackles 311 arranged at equal intervals, and the inside of the right section steel is provided with A plurality of second hooks 321 are arranged at equal intervals, and the lower cover plate is provided with a plurality of first hooks 221 and second hooks 222 corresponding to the first hooks and the second hooks; the first hooks and the second hooks Are respectively slidably connected to the lower cover; the right side wall of the left side section steel is provided with a number of first long holes 312 for the first hook to extend, and the left side wall of the right side section steel is provided with a number of A second long hole 322 into which the second hook extends, the first long hole corresponds to the first hook and loop one to one, and the second long hole corresponds to the second hook and loop one to one;

A number of pressing springs 4 are arranged under the cover plate, and the pressing springs are arranged under the sliding groove one by one. (The pressing spring selects a spring with a shorter length and a larger damping coefficient).

Both the first long hole and the second long hole are through holes.

The left-side section steel and the right-side section steel are symmetrically arranged and structurally the same.

The specific structure for realizing the sliding connection of the first hook and the second hook is: the lower cover plate is provided with a sliding groove 23, the sliding groove is provided with a sliding rail 231, and the top end of the first hook and the The top ends of the second hooks are respectively provided with sliders 232, which are sleeved on the sliding rail and can slide along the sliding rail.

A first compression spring 233 is provided between the first hook and the sliding groove; a second compression spring 234 is provided between the second hook and the sliding groove.

The left section steel and the right section steel are both rectangular steels, the first hook is fixedly connected to the left inner wall of the left section steel, and the second hook is fixedly connected to the right inner wall of the right section steel.

The first section steel and the second section steel are respectively welded to the steel bars of the bridge.

Elastic filling materials (not shown in the figure) are filled between the lower cover plate, the first section steel, and the second section steel.

The elastic filling material is polyurethane sealant, organic silicon sealant or polysulfide sealant.

The working principle of the utility model is as follows:

First install the left and right section steels on both sides of the expansion joint and weld them with the steel bars of the bridge, then cover the lower cover plate on the upper end of the expansion joint (shown in Figure 1 above), press the lower cover plate while squeezing the second A squeeze spring and a second squeeze spring push the first hook and the second hook to both sides, and then loosen the lower cover. The lower cover drives the first hook and the second hook to rise under the force of the pressing spring. When the pressing spring returns to normal, loosen the first pressing spring and the second pressing spring. At this time, the first hook and the second hook hook the hanging ring and are under the action of the first pressing spring and the second pressing spring. Respond to the deformation of the expansion joint to avoid potential safety hazards caused by cracks in the expansion joint. The structure is stable and the bearing capacity is good. Finally, the cover is covered.

The above are only the embodiments of the present utility model, and do not therefore limit the scope of the present utility model. Any equivalent structural transformation made using the content of the utility model description and drawings, or directly or indirectly applied to other related technical fields , The same reason is included in the scope of patent protection of this utility model.

Claims

A new type of bridge expansion joint structure, which is characterized in that it includes expansion joints, the expansion joints are provided with expansion devices, the expansion devices include a cover plate and a section steel, and the section steel includes left section steel and Right-side section steel, the cover plate is arranged above the expansion joint, and the cover plate is flush with the bridge deck;

The cover plate is detachably connected to the section steel, the cover plate includes an upper cover plate and a lower cover plate, the upper cover plate is arranged above the lower cover plate, and the upper cover plate and the lower cover plate can be Disassembly and connection; the left side section steel and the right side section steel are respectively provided with a number of first shackles and second shackles arranged at equal intervals, the lower cover plate is provided with a number of first shackles and second hooks The first hook and the second hook corresponding to the ring; the first hook and the second hook are respectively slidably connected to the lower cover plate; the right side wall of the left side section steel and the left side wall of the right side section steel A number of first long holes and second long holes into which the first hook and the second hook extend are respectively provided, and the first long holes correspond to the first hook and loop one by one, and the second long holes One-to-one correspondence with the second shackle;

A number of pressing springs are arranged under the cover plate.
The new bridge expansion joint structure according to claim 1, wherein the specific structure for realizing the sliding connection of the first hook and the second hook is: the lower cover plate is provided with a sliding groove, and the sliding groove A sliding rail is provided, the top of the first hook and the top of the second hook are respectively provided with sliding blocks, and the sliding blocks are sleeved on the sliding rails and can slide along the sliding rails.
The new bridge expansion joint structure according to claim 2, characterized in that: a first compression spring is provided between the first hook and the slide groove; a second compression spring is provided between the second hook and the slide groove Compression spring.
The new bridge expansion joint structure according to claim 1, characterized in that: the left section steel and the right section steel are both rectangular steel, and the first hook is fixedly connected to the left inner wall of the left section steel, so The second hook is fixedly connected to the right inner wall of the right steel section.
The new bridge expansion joint structure according to claim 1, wherein the first section steel and the second section steel are respectively welded to the steel bars of the bridge.
The new bridge expansion joint structure according to claim 1, characterized in that: elastic filling materials are filled between the lower cover plate, the first section steel, and the second section steel.
The new bridge expansion joint structure according to claim 6, characterized in that the elastic filling material is polyurethane sealant, silicone sealant or polysulfide sealant.