A bridge earthquake-resistant and anti-collapse expansion joint device

Abstract

The present invention discloses a bridge anti-seismic and anti-collapse expansion joint device, which is composed of a horizontal control limit assembly, a long comb-tooth angle steel limit assembly, a polyurea elastic damping assembly and an expansion joint device anchor assembly. Among them, the polyurea elastomer in the polyurea elastic damping assembly can both absorb and disperse energy in structural vibration and vibration, effectively reduce noise, and give the bridge more safety and tranquility. The horizontal control limit assembly, the long comb-tooth angle steel limit assembly and the polyurea elastic damping assembly and the expansion joint device anchor assembly together construct three sturdy limit devices. The expansion joint device anchor assembly cooperates with the U-shaped steel bars, the bridge-oriented steel bars and the transverse structural steel bars in the expansion joint device bridge body through the cooperation of the pipe sleeve, D-shaped bolts, limit steel bars, anchor steel bars and rivets, and the expansion joint device anchor assembly works together to firmly fix the anti-seismic and anti-collapse expansion joint device between the beam body and the beam body or the beam body and the abutment, ensuring that the device can play a vital role in safety and stability at critical moments.

Description

Technical Field

[0001] The invention relates to the technical field of bridge transportation, and in particular to an anti-seismic and anti-collapse expansion joint device for bridges. Background Art

[0002] In recent years, natural disasters, overloaded vehicles and ship collisions have posed a serious threat to the safety of bridge structures. Bridge collapses caused by natural disasters such as earthquakes, floods, and mudslides are common. At the same time, overweight and overloaded vehicles are also a serious problem, which can cause damage to bridge structures or even collapse. In addition, ship collisions are also an important cause of bridge damage. In recent years, there have been many accidents of ships crashing into bridges.

[0003] Under the action of earthquakes, the shaking of bridges will lead to an increase in the amplitude of undamped vibrations, especially for beam bridge structures. When the beam loses the support of the piers, it will cause the beam to fall. Although commonly used earthquake-resistant measures include setting lateral blocks on the piers to prevent the beam from falling, these measures are still prone to damage to bridges during earthquakes, and their effects are limited and cannot constrain longitudinal displacement. The effects of overweight and overloaded vehicles on bridges cannot be ignored, especially single-column pier bridges, curved beams, steel box beams and other bridges, as well as some existing bridges with poor anti-overturning capabilities, some of which cannot meet the requirements of the new design specifications. In addition, ship collisions with bridges are also an important cause of bridge damage, which is usually caused by ship navigation errors, improper operation or excessive height, some of which are caused by collisions with bridge piers and some by collisions with beams.

[0004] The current bridge seismic and anti-collapse design and reinforcement measures mainly focus on the performance of single beams and piers, but lack a solution that can elastically connect all beams in series. In order to improve the overall safety, seismic resistance and bearing capacity of the bridge, while meeting the expansion and deformation functions of the beam, and having the characteristics of seamless invisibility, waterproof, maintenance-free, and driving comfort, it is particularly necessary to research and develop an innovative bridge seismic and anti-collapse expansion joint device.

[0005] In summary, the research and development of this innovative bridge anti-seismic and anti-collapse expansion joint device will bring new breakthroughs to the field of bridge engineering and help improve the overall safety, reliability and comfort of bridge structures. This will be of great significance to ensuring transportation safety and reducing bridge damage caused by natural disasters and human factors. Summary of the invention

[0006] The purpose of the present invention is to provide a bridge anti-seismic and anti-collapse expansion joint device in view of the defects of the prior art, which is carefully combined by making full use of the horizontal control limit assembly, the long comb angle steel limit assembly, the polyurea elastic damping assembly and the expansion joint device anchor assembly. The technical solution adopted by the present invention is as follows:

[0007] The present invention first provides a bridge anti-seismic and anti-collapse expansion joint device, comprising a comb-tooth angle steel limit assembly, a polyurea elastic damping assembly, a horizontal control limit assembly, and an expansion joint device anchor assembly;

[0008] The comb-tooth angle steel limit assembly comprises a long comb-tooth angle steel and a short comb-tooth angle steel arranged opposite to each other; comb teeth are arranged on the opposite side of the long comb-tooth angle steel and the short comb-tooth angle steel, and the comb teeth of the two are complementary, and an upward bend is arranged on the non-comb-tooth side of the two, so that the long comb-tooth angle steel and the short comb-tooth angle steel form a groove structure as a whole; porous angle steels are fixed at the bends on both sides of the groove structure;

[0009] There are multiple horizontal control limit assemblies, which are telescopic rod structures. The telescopic rod structures span the groove structure, and the two ends of the telescopic rod structures are respectively fixed at the two ends of the groove structure to play a horizontal limit role for the groove structure;

[0010] The expansion joint device anchoring assembly includes a limiting steel bar on the short comb tooth angle steel side and an anchoring steel bar on the long comb tooth angle steel side located below the groove structure; the limiting steel bar is welded to the bottom of the short comb tooth angle steel, and one end thereof passes through the strip limiting hole arranged on the long comb tooth angle steel from bottom to top and is fixedly connected to the porous angle steel on the short comb tooth angle steel side, the anchoring steel bar is welded to the bottom of the long comb tooth angle steel, and one end thereof passes through the long comb tooth angle steel and is fixedly connected to the porous angle steel on the long comb tooth angle steel side; the polyurea elastic damping assembly is filled in the groove structure, and the top is flush with the groove structure.

[0011] The present invention also provides an installation and construction method of the above-mentioned bridge earthquake-resistant and anti-collapse expansion joint device, which comprises the following steps:

[0012] 1) According to the width of the bridge expansion joint, long comb-tooth angle steel and short comb-tooth angle steel are respectively arranged on both sides of the expansion joint, the comb teeth of the long comb-tooth angle steel and the short comb-tooth angle steel are arranged opposite to each other, and a comb-tooth gap is reserved between them, wherein the comb teeth of the long comb-tooth angle steel cross the bridge expansion joint;

[0013] 2) Multi-hole angle steels are arranged at both ends of the inner bottom of the groove frame formed by the long comb tooth angle steel and the short comb tooth angle steel, and the multi-hole angle steels are fixed with D-shaped bolts; then the D-shaped bolts are welded and fixed to the long comb tooth angle steel or the short comb tooth angle steel; and the horizontal control limit assembly is installed on the comb tooth angle steel limit assembly;

[0014] 3) The limiting steel bar is welded to the bottom of the short comb tooth angle steel, and one end thereof passes through the strip limiting hole provided on the long comb tooth angle steel from bottom to top and is fixedly connected to the porous angle steel on the side of the short comb tooth angle steel; the anchoring steel bar is welded to the bottom of the long comb tooth angle steel, and one end thereof passes through the long comb tooth angle steel and is fixedly connected to the porous angle steel on the side of the long comb tooth angle steel;

[0015] 4) Casting polyurea elastomer in the groove structure formed by the long comb-tooth angle steel and the short comb-tooth angle steel to form a polyurea elastic damping component, and the upper surface of the polyurea elastic damping component is flush with the upper end surface of the groove structure; at this point, the assembly of the expansion joint device is completed;

[0016] 5) Dig out installation grooves for setting expansion joint devices at the expansion joints of the bridge, clean out or overlap the longitudinal steel bars and U-shaped steel bars in the bridge, use galvanized steel plates to support the formwork to leave the expansion joints of the bridge, and weld the galvanized steel plates to the longitudinal steel bars;

[0017] 6) Place the expansion joint device just above the expansion joint of the bridge, with the top surface of the expansion joint device flush with the asphalt pavement; the D-shaped bolts and the U-shaped steel bars in the expansion joint installation groove form a snap-on overlap, and insert the transverse structural steel bars, and set the transverse structural steel bars at other locations that require transverse connection or fixation; bend the extended ends of the limiting steel bars and anchoring steel bars to fasten them to the preset steel bars in the beam body or abutment, and weld and fix the transverse structural steel bars to the D-shaped bolts, limiting steel bars, anchoring steel bars, U-shaped steel bars, and steel bars along the bridge to form a steel skeleton;

[0018] 7) Pour concrete in the installation groove so that the concrete is flush with the asphalt pavement and the top surface of the expansion joint device. After the concrete solidifies, the installation of the bridge's earthquake-resistant and anti-collapse expansion joint system is completed.

[0019] Compared with the prior art, the bridge earthquake-resistant and anti-collapse expansion joint device and its assembly provided by the present invention have the following beneficial effects:

[0020] 1) Excellent earthquake resistance and collapse prevention capabilities

[0021] The present invention provides three strong limit devices for the bridge through the synergistic effect of the horizontal control limit assembly, the long comb angle steel limit assembly and the polyurea elastic damping assembly, thereby improving the bridge's load-bearing performance and anti-collision performance. In abnormal situations such as earthquakes, overweight vehicles, and ship collisions, these components can effectively curb the excessive displacement of the beam body and prevent the separation of the beam body from the beam body or the beam body from the abutment, thereby significantly improving the bridge's earthquake resistance and anti-collapse ability.

[0022] 2) Excellent elasticity and durability

[0023] Through the design of the polyurea elastic damping component, the present invention can adapt to the expansion and contraction deformation of the bridge, ensuring the stability and comfort of the bridge in various environments and usage scenarios. At the same time, the polyurea elastomer has excellent weather resistance, chemical corrosion resistance and fatigue resistance, so that the device has a long service life.

[0024] 3)Easy to install and maintain

[0025] The present invention adopts modular design, the connection between components is simple, the installation is convenient, and the construction period is greatly shortened. At the same time, the device has the characteristics of seamless invisible, waterproof, maintenance-free, noise reduction, etc., which reduces the later maintenance cost.

[0026] 4) Improve the overall safety of the bridge

[0027] Through the application of the present invention, the overall safety, reliability and comfort of the bridge can be effectively improved, which helps to reduce bridge damage caused by natural disasters and human factors and ensure the safety of bridge structure and transportation.

[0028] 5) Wide applicability

[0029] The present invention is applicable to various types of bridges, including beam bridges, arch bridges, cable-stayed bridges, etc., and is low-cost and high-efficiency for earthquake-resistant reinforcement. At the same time, customized designs can also be carried out according to the actual conditions of different bridges to meet the specific needs of different bridges.

[0030] In summary, the bridge seismic and anti-collapse expansion joint system and its assembly provided by the present invention have significant beneficial effects and are of great significance for improving the technical level and safety assurance capabilities in the field of bridge engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A structural schematic diagram of a bridge earthquake-resistant and anti-collapse expansion joint system is provided for an embodiment of the present invention;

[0032] Figure 2 A structural schematic diagram of a bridge earthquake-resistant and anti-collapse expansion joint device is provided for an embodiment of the present invention;

[0033] Figure 3 A top view of the main structure of the bridge anti-seismic and anti-collapse expansion joint device is provided for an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the horizontal control assembly of the bridge seismic and collapse-resistant expansion joint device;

[0035] Figure 5 Schematic diagram of the structure of the long / short comb angle steel forming a channel frame for the bridge's earthquake-resistant and collapse-resistant expansion joint device;

[0036] Figure 6 This is a schematic diagram of the structure of the limiting steel bars and anchoring steel bars of the bridge's earthquake-resistant and collapse-resistant expansion joint device;

[0037] Figure 7 This is a schematic diagram of the structure of the D-shaped bolts used in the bridge's earthquake-resistant and collapse-resistant expansion joint installation.

[0038] In the figure, round steel 1, spring 2, nut 3, pipe sleeve 4, porous angle steel 5, long comb tooth angle steel 6, short comb tooth angle steel 7, polyurea elastomer 8, D-shaped bolt 9, limit steel bar 10, anchor steel bar 11, rivet 12, U-shaped steel bar 13, steel bar along the bridge direction 14, transverse structural bar 15, concrete 16, galvanized steel plate 17, horizontal control limit assembly 21, comb tooth angle steel limit assembly 22, polyurea elastic damping assembly 23, expansion joint device anchor assembly 24. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0044] The bridge anti-seismic and anti-collapse expansion joint device of the present invention is mainly used in bridge engineering to improve the anti-seismic and anti-collapse capabilities of the bridge. Figure 1The figure shows a typical application scenario of the expansion joint device of the present invention. In this scenario, the earthquake-resistant and anti-collapse expansion joint device of the present invention is fixed between beams or between beams and abutments to prevent the separation of beams or between beams and abutments, thereby significantly improving the earthquake-resistant and anti-collapse capabilities of the bridge. Since the expansion joint is usually perpendicular to the length direction of the bridge, in this application scenario, the length direction of the expansion joint is usually the width direction of the bridge, and the width direction of the expansion joint is usually the length direction of the bridge. Figure 1-Figure 3 As shown, the bridge earthquake-resistant and anti-collapse expansion joint device of this embodiment includes a horizontal control limit assembly 21, a long comb-tooth angle steel limit assembly 22, a polyurea elastic damping assembly 23 and an expansion joint device anchor assembly 24.

[0045] The comb angle steel limit assembly 22 of the present invention mainly includes a long comb angle steel 6 and a short comb angle steel 7. In a specific embodiment of the present invention, Figure 3 and Figure 5 As shown, the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 are arranged opposite to each other on both sides of the expansion joint, and comb-tooth structures are arranged on the opposite sides, and the comb-tooth structures of the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 are complementary, and an upward bend is arranged on the non-comb-tooth side, so that the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 form a groove-type structure as a whole, wherein the comb-tooth part of the long comb-tooth angle steel 6 spans the expansion joint of the bridge, and a plurality of long strip-shaped limiting holes are arranged on the comb teeth, and the length direction of the limiting holes is parallel to the width direction of the expansion joint.

[0046] In this embodiment, porous angle steels 5 are fixed at the two bending parts on both sides of the groove structure; the porous angle steels 5 are parallel to the length direction of the expansion joint, and each porous angle steel 5 is fixed with a plurality of D-shaped bolts 9. Figure 7 As shown, the D-shaped bolt 9 is a ring structure with a gap formed by surrounding steel bars, one end of the D-shaped bolt 9 vertically penetrates from the bottom of the long comb tooth angle steel 6 or the short comb tooth angle steel 7, and fixes the porous angle steel 5 on the long comb tooth angle steel 6 or the short comb tooth angle steel 7; the other end of the D-shaped bolt 9 is welded to the outside of the long comb tooth angle steel 6 or the short comb tooth angle steel 7; the porous angle steel 5 is provided with a plurality of structural holes and forms an integral structure with the polyurea elastomer 8 through the structural holes.

[0047] In a specific embodiment of the present invention, the horizontal control limit assembly 21 is as follows Figure 4As shown, it includes round steel 1, spring 2, nut 3 and pipe sleeve 4; round steel 1 is arranged along the width direction of the expansion joint and passes through the long comb tooth angle steel 6 and the short comb tooth angle steel 7 on both sides; spring 2 is sleeved on both ends of round steel 1 and located between the long comb tooth angle steel 6 or the short comb tooth angle steel 7 and nut 3; nut 3 is screwed on the end thread of round steel 1; pipe sleeve 4 is sleeved on both ends of round steel 1 and located outside the long comb tooth angle steel 6 or the short comb tooth angle steel 7. The horizontal control limit assembly 21 plays a horizontal limit role on the groove structure; after the polyurea elastic damping assembly 23 is filled in the groove structure, the round steel 1 can prevent the polyurea elastic damping assembly 23 from arching during the compression deformation process.

[0048] In a specific embodiment of the present invention, the polyurea elastic damping component 23 includes a polyurea elastomer 8; the polyurea elastomer 8 is cast in a groove frame formed by the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7, and the upper surface of the polyurea elastomer 8 is flush with the groove frame. The round steel 1, the porous angle steel 5, the D-shaped bolt 9, and the limiting steel bar 10 in the groove frame are all wrapped by the polyurea elastomer 8.

[0049] In a specific embodiment of the present invention, the limiting steel bars 10 and the anchoring steel bars 11 are both arranged horizontally and perpendicular to the length direction of the expansion joint; there are multiple limiting steel bars 10 and anchoring steel bars 11, each of which is arranged at equal intervals; the length direction of the strip limiting hole is parallel to the width direction of the expansion joint; when the width of the beam expansion joint is too large, the limiting steel bars pull the long comb-tooth angle steel through the strip limiting hole to limit the long comb-tooth angle steel. The limiting steel bars 10 and the anchoring steel bars 11 are both horizontally extended out of the bottom of the trough structure, and the extended ends are fixed to the preset steel bars in the beam body or the abutment by bending, rivets 12 and welding to form a steel skeleton, so that the expansion joint device is fixedly connected to the beam body or the abutment.

[0050] In order to more clearly express the installation process of the above device, this embodiment also provides an installation and construction method of a bridge earthquake-resistant and anti-collapse expansion joint device, comprising the following steps:

[0051] 1) Long comb-tooth angle steel 6 and short comb-tooth angle steel 7 are respectively arranged on both sides of the bridge expansion joint, and the comb teeth of the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 are arranged opposite to each other, wherein the comb teeth of the long comb-tooth angle steel 6 span the bridge expansion joint, and a certain tooth gap width is reserved between the comb teeth of the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7, and the tooth gap width is determined according to the temperature during installation and the expansion joint device model;

[0052] 2) A porous angle steel 5 is arranged at both ends of the bottom of the inner side of the groove frame formed by the long comb tooth angle steel 6 and the short comb tooth angle steel 7, and the porous angle steel 5 is fixed with a D-shaped bolt 9; then the D-shaped bolt 9 is welded and fixed to the long comb tooth angle steel 6 or the short comb tooth angle steel 7; and the horizontal control limit assembly 21 is installed on the comb tooth angle steel limit assembly 22;

[0053] 3) The round steel 1 passes through the long comb tooth angle steel 6, the short comb tooth angle steel 7, and the porous angle steels 5 on both sides, and the two ends are exposed outside the groove frame formed by the long comb tooth angle steel 6 or the short comb tooth angle steel 7. The two ends of the round steel 1 are respectively covered with springs 2, nuts 3 are screwed on, and then sleeves 4 are covered. The sleeves 4 are fixed to the long comb tooth angle steel 6 or the short comb tooth angle steel 7 by welding;

[0054] 4) The limiting steel bar 10 is welded to the bottom of the short comb-tooth angle steel 7, and one end thereof passes through the strip limiting hole provided on the long comb-tooth angle steel 6 from bottom to top and is fixedly connected to the porous angle steel 5 on the side of the short comb-tooth angle steel. The anchoring steel bar 11 is welded to the bottom of the long comb-tooth angle steel 6, and one end thereof passes through the long comb-tooth angle steel 6 and is fixedly connected to the porous angle steel 5 on the side of the long comb-tooth angle steel;

[0055] 5) Casting polyurea in the trough frame. The polyurea is formed by mixing and curing on site with semi-prepolymer, amino-terminated polyether, delayed diamine chain extender and other raw materials to form a polyurea elastomer 8. The upper surface is flush with the trough frame. The round steel 1, porous angle steel 6, D-shaped bolts 9 and limiting steel bars 10 in the trough frame are wrapped by the polyurea elastomer 8. At this point, the production of the bridge earthquake-resistant and anti-collapse expansion joint device is completed.

[0056] 6) After the asphalt concrete pavement of the bridge is constructed, an installation groove for setting the earthquake-resistant and anti-collapse expansion joint device of the bridge of the present invention is dug out at the expansion joint of the bridge, and the pre-installed longitudinal steel bars 14 and U-shaped steel bars 13 in the bridge are cleaned out or overlapped, and a galvanized steel plate 17 is used to support the formwork to leave a bridge expansion gap, and the galvanized steel plate 17 is welded and fixed to the longitudinal steel bars 14.

[0057] 7) The bridge anti-seismic and anti-collapse expansion joint device of the present invention is placed along the bridge direction just above the expansion joint of the bridge, and the expansion joint device surface is flush with the asphalt pavement.

[0058] 8) The D-shaped bolt 9 forms a snap-on overlap with the U-shaped steel bar 13 in the expansion joint installation groove, and the transverse structural steel bar 15 is inserted. Transverse structural steel bars 15 are correspondingly arranged at other positions, and are welded and fixed with the D-shaped bolt 9, limiting steel bars 10, anchor steel bars 11, U-shaped steel bars 13, and steel bars along the bridge 14 to form a steel bar skeleton.

[0059] 9) Pour concrete 16 in the installation groove, so that the concrete is flush with the asphalt pavement and the expansion joint installation surface. After the concrete solidifies, the installation of the expansion joint device is completed.

[0060] The polyurea elastomer 8 in the polyurea elastic damping component 23 of the present invention exhibits excellent damping properties. It acts as an efficient energy "absorber" in structural vibrations and can both absorb and disperse energy, effectively reduce noise, and give the bridge more safety and tranquility.

[0061] The horizontal control limit assembly 21 connects the beam body and the beam body or the beam body and the abutment in series across the expansion joint of the bridge. The horizontal control limit assembly 21 and the long / short comb-tooth angle steel of the expansion joint device anchor assembly 24 form a first limit device; when the expansion joint of the bridge becomes narrower, the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 shrink inward, and the spring 2 unfolds; when the expansion joint of the bridge becomes wider, the long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 expand outward and squeeze the spring 2. When the width of the expansion joint of the beam is too large, it is constrained by the nuts 3 mounted on both ends of the round steel 1, thereby preventing the single-link beam from overturning or falling.

[0062] The long comb-tooth angle steel 6 of the present invention spans the expansion joint of the bridge, and connects the beam body to the beam body or the beam body to the abutment in series with the limiting steel bar 10 welded and fixed to the short comb-tooth angle steel. The long comb-tooth angle steel 6, the limiting steel bar 7 and the expansion joint device anchoring assembly 24 form a second limiting device; when the width of the beam expansion joint is too large, the limiting steel bar 10 pulls the long comb-tooth angle steel 6 through the strip limiting hole, thereby limiting the long comb-tooth angle steel 6.

[0063] The two porous angle steels 5 of the present invention respectively fix the two ends of the polyurea elastomer 8 along the bridge direction to the beam and the beam or the beam and the abutment under the action of the D-shaped bolts 9, so as to realize the elastic series connection function between the beam and the beam or the beam and the abutment. The polyurea elastic damping assembly 23 and the expansion joint device anchor assembly 24 form a third limiting device. When the expansion joint width is too small, the rigid collision between the beam and the beam or the beam and the abutment is avoided. When the expansion joint width is too large, the polyurea elastomer 8 can be constrained to prevent the single-link beam from overturning or falling. The long comb-tooth angle steel 6 and the short comb-tooth angle steel 7 are arranged opposite to each other and form a groove structure without bonding with the middle part of the polyurea elastomer 8. This part of the polyurea elastomer can stretch and compress to adapt to the change of the expansion joint width of the bridge due to thermal expansion and contraction, so as to realize a seamless expansion joint. When the structure is stretched or compressed by an external force, the polyurea produces internal friction and deformation, converting part of the energy into heat energy and elastic energy, thereby reducing the vibration and noise of the structure.

[0064] The horizontal control limit assembly 21, comb angle steel limit assembly 22 and polyurea elastic damping assembly 23 of the present invention and the expansion joint device anchor assembly 24 together form three solid limit devices. When the beam body encounters abnormal displacement, these limit devices are like loyal "guardians" and can effectively prevent the separation of beams from each other or from the abutments, providing an indestructible anti-collapse protection for the bridge under various challenges such as earthquakes, overweight vehicles, and collisions.

[0065] The present invention uses the precise matching of the pipe sleeve 4, D-shaped bolt 9, limiting steel bar 10, and anchoring steel bar 11, and cooperates with the U-shaped steel bar, the steel bar along the bridge direction, and the transverse structural steel bar in the installation groove of the bridge expansion joint device to firmly fix the earthquake-resistant and anti-collapse expansion joint device between the beam body and the beam body or between the beam body and the abutment, ensuring that the device can play a vital role in safety and stability at critical moments. This exquisite structure provides a solid foundation for future bridge construction, reconstruction, and reinforcement.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A bridge earthquake-resistant and anti-collapse expansion joint device, characterized in that: It comprises a comb angle steel limit assembly (22), a polyurea elastic damping assembly (23), a horizontal control limit assembly (21) and an expansion joint device anchor assembly (24); The comb-tooth angle steel limiting assembly (22) comprises a long comb-tooth angle steel (6) and a short comb-tooth angle steel (7) arranged opposite to each other; comb teeth are arranged on the opposite sides of the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7), the comb teeth of the two are complementary, and the two are arranged with an upward bend on the non-comb tooth side, so that the long comb-tooth angle steel and the short comb-tooth angle steel form a groove-shaped structure as a whole; and porous angle steels (5) are fixed at the bends on both sides of the groove-shaped structure; There are multiple horizontal control limit assemblies (21), which are telescopic rod structures. The telescopic rod structures span the groove structure, and the two ends of the telescopic rod structures are respectively fixed to the two ends of the groove structure, so as to play a horizontal limit role for the groove structure. The expansion joint device anchoring assembly (24) comprises a limiting steel bar (10) located on the short comb tooth angle steel side below the groove structure and an anchoring steel bar (11) located on the long comb tooth angle steel side; the limiting steel bar (10) is welded to the bottom of the short comb tooth angle steel (7), and one end thereof passes through a strip limiting hole provided on the long comb tooth angle steel (6) from bottom to top and is fixedly connected to the porous angle steel (5) on the short comb tooth angle steel side; the anchoring steel bar (11) is welded to the bottom of the long comb tooth angle steel (6), and one end thereof passes through the long comb tooth angle steel (6) and is fixedly connected to the porous angle steel (5) on the long comb tooth angle steel side; The polyurea elastic damping component (23) is filled in the groove structure, and the top is flush with the groove structure.

2. The bridge anti-seismic and anti-collapse expansion joint device according to claim 1, characterized in that: The long comb-tooth angle steel (6) and the short comb-tooth angle steel (7) are respectively fixed on both sides of the bridge expansion joint, wherein the comb-tooth portion of the long comb-tooth angle steel (6) spans the bridge expansion joint; and a gap is reserved between the comb-tooth portions of the comb-tooth angle steel (6) and the short comb-tooth angle steel (7).

3. The bridge anti-seismic and anti-collapse expansion joint device according to claim 1, characterized in that: The porous angle steel (5) is arranged along the length direction of the expansion joint and is fixed by a plurality of D-shaped bolts (9); the D-shaped bolts (9) are annular structures with gaps formed by being surrounded by steel bars; one end of the D-shaped bolts (9) vertically penetrates from the bottom of the long comb-tooth angle steel (6) or the short comb-tooth angle steel (7) and fixes the porous angle steel (5) on the long comb-tooth angle steel (6) or the short comb-tooth angle steel (7); the other end of the D-shaped bolts (9) is welded to the outside of the long comb-tooth angle steel (6) or the short comb-tooth angle steel (7); the porous angle steel (5) is provided with a plurality of structural holes and forms an integral structure with the polyurea elastomer (8) through the structural holes.

4. The bridge anti-seismic and anti-collapse expansion joint device according to claim 1, characterized in that: The horizontal control limit assembly (21) comprises a round steel (1), a spring (2), a nut (3) and a sleeve (4); the round steel (1) is arranged along the width direction of the expansion joint, the two ends of the round steel (1) respectively pass through the bends of the long comb tooth angle steel (6) and the short comb tooth angle steel (7), and the spring (2) is arranged at the end passing through and the nut (3) is arranged outside the spring (2); the sleeve (4) is respectively sleeved on the two ends of the round steel (1), and the spring (2) and the nut (3) are sleeved inside, and the two sleeves (4) of the horizontal control limit assembly (21) are respectively welded to the long comb tooth angle steel (6) and the short comb tooth angle steel (7); after the polyurea elastic damping assembly (23) is filled in the groove structure, the round steel (1) can prevent the polyurea elastic damping assembly (23) from arching during the compression deformation process.

5. The bridge anti-seismic and anti-collapse expansion joint device according to claim 4, characterized in that: After installation, the horizontal control limit assembly (21) plays a limiting role on the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7); when the bridge expansion joint becomes narrower, the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7) shrink inwards and the spring (2) expands; when the bridge expansion joint becomes wider, the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7) expand outwards and squeeze the spring (2); when the width of the beam expansion joint is too large, it is constrained by the nuts (3) mounted on both ends of the round steel (1), thereby preventing the single-link beam from overturning or falling.

6. The bridge anti-seismic and anti-collapse expansion joint device according to claim 1, characterized in that: The limiting steel bars (10) and the anchoring steel bars (11) are both arranged horizontally and perpendicular to the length direction of the expansion joint; there are a plurality of limiting steel bars (10) and anchoring steel bars (11), which are arranged at equal intervals; the length direction of the strip limiting holes is parallel to the width direction of the expansion joint; when the width of the beam expansion joint is too large, the limiting steel bars pull the long comb-tooth angle steel through the strip limiting holes, thereby limiting the long comb-tooth angle steel.

7. The bridge anti-seismic and anti-collapse expansion joint device according to claim 6, characterized in that: The limiting steel bars (10) and the anchoring steel bars (11) are both horizontally extended out of the bottom of the trough structure, and the extended ends are fixed to the steel bars preset in the beam body or the abutment by bending and welding to form a steel bar skeleton, so that the expansion joint device is fixedly connected to the beam body or the abutment.

8. An installation and construction method for the bridge earthquake-resistant and anti-collapse expansion joint device as claimed in claim 1, characterized in that: The following steps are involved: 1) According to the width of the bridge expansion joint, a long comb-tooth angle steel (6) and a short comb-tooth angle steel (7) are respectively arranged on both sides of the expansion joint, the comb teeth of the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7) are arranged opposite to each other, and a comb-tooth gap is reserved between them, wherein the comb-tooth portion of the long comb-tooth angle steel (6) crosses the bridge expansion joint; 2) a porous angle steel (5) is arranged at both ends of the bottom of the inner side of the groove frame formed by the long comb tooth angle steel (6) and the short comb tooth angle steel (7), and the porous angle steel (5) is fixed by using a D-shaped bolt (9); then the D-shaped bolt (9) is welded and fixed to the long comb tooth angle steel (6) or the short comb tooth angle steel (7); and the horizontal control limit assembly (21) is installed on the comb tooth angle steel limit assembly (22); 3) The limiting steel bar (10) is welded to the bottom of the short comb-tooth angle steel (7), and one end thereof passes through the strip limiting hole provided on the long comb-tooth angle steel (6) from bottom to top and is fixedly connected to the porous angle steel (5) on the side of the short comb-tooth angle steel; the anchoring steel bar (11) is welded to the bottom of the long comb-tooth angle steel (6), and one end thereof passes through the long comb-tooth angle steel (6) and is fixedly connected to the porous angle steel (5) on the side of the long comb-tooth angle steel; 4) Casting a polyurea elastomer (8) in the groove structure formed by the long comb-tooth angle steel (6) and the short comb-tooth angle steel (7) to form a polyurea elastic damping component (23), wherein the upper surface of the polyurea elastic damping component (23) is flush with the upper end surface of the groove structure; thus, the assembly of the expansion joint device is completed; 5) digging out an installation groove for setting an expansion joint device at the expansion joint of the bridge, and cleaning out or overlapping the longitudinal steel bars and U-shaped steel bars in the bridge, using a galvanized steel plate (17) to support the formwork to leave a bridge expansion joint gap, and the galvanized steel plate (17) is welded and fixed to the longitudinal steel bars; 6) The expansion joint device is placed directly above the expansion joint of the bridge, and the top surface of the expansion joint device is flush with the asphalt pavement; the D-shaped bolts and the U-shaped steel bars in the expansion joint installation groove form a snap-on overlap, and the transverse structural steel bars are inserted, and the transverse structural steel bars are set at other positions that require transverse connection or fixation; the protruding ends of the limiting steel bars (10) and the anchoring steel bars (11) are fastened to the preset steel bars in the beam body or the abutment by bending, and the transverse structural steel bars are welded and fixed to the D-shaped bolts, the limiting steel bars, the anchoring steel bars, the U-shaped steel bars, and the steel bars along the bridge to form a steel skeleton; 7) Concrete is poured in the installation groove, and the concrete is flush with the asphalt pavement and the top surface of the expansion joint device. After the concrete is solidified, the installation of the bridge earthquake-resistant and anti-collapse expansion joint system is completed.

9. The method according to claim 8, characterized in that: The groove structure is not bonded to the middle part of the polyurea elastomer (8), and the middle part of the polyurea elastomer (8) adapts to the change of the expansion joint width of the bridge through stretching and compression; the polyurea elastomer (8) is formed by on-site stirring and curing of semi-prepolymer, terminal amino polyether and delayed diamine chain extender.

Images