A bridge expansion joint structure and installation construction method thereof

Abstract

The present invention relates to the technical field of bridge construction, and in particular to a bridge expansion joint structure and its installation and construction method, which solves the technical problems in the prior art that the bridge expansion joint faces complex load conditions and many structural positions face problems. It includes: a laterally retractable component body, which can extend a preset distance to both sides of the component body; a group of expansion joint structural parts are arranged on both sides of the component body, each group of expansion joint structural parts corresponds to an embedded part, and the embedded part can be embedded in the concrete pavement; a strength support part can provide continuous support for the component body during the expansion and contraction of the component body; and a balance adjustment structure, which connects the component body and can track the embedded part on one side, so that the strength support part can maintain the balance of the component body when it breaks under the expansion and contraction displacement. This technical solution can better cope with the comprehensive load, and the configuration of the above structure improves the heavy-duty level of the bridge expansion joint.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a bridge expansion joint structure and an installation and construction method thereof. Background Art

[0002] Bridge expansion joints are designed to "breathe" to accommodate structural deformation. In addition to receiving loads from passing vehicles, natural factors such as wind, rain, snow, and seasonal changes also contribute to their ability to breathe. Over time, the continuous tangential and longitudinal loads generated by the passage of vehicles can cause expansion joints to bulge, shift, and even damage the adjacent road surface.

[0003] The specific working principle of bridge expansion joints is as follows: Bridge expansion joints are important components of the bridge deck system. Their main function is to adjust the displacement and connection between the superstructure caused by vehicle loads and bridge components. They are usually set between the two beam ends, between the beam end and the abutment, or at the hinge position of the bridge.

[0004] Among them, the "Design Code for Highway Traffic Safety Facilities" (JTG D81-2017) stipulates that bridge guardrails should be equipped with expansion joints along the main structure of the bridge, and the expansion joint design of the bridge guardrail beams should be consistent with the displacement of the bridge expansion joints. At the location of the beam expansion joints, on the one hand, it is necessary to ensure that the bridge can expand and contract freely; on the other hand, the structural continuity of the bridge guardrail should be considered.

[0005] In addition, the expansion joints of bridges are weak points in traffic safety protection, and the guardrails at the expansion joints are the last line of defense against traffic accidents at this location. If the guardrails at the expansion joints are insufficient in protection or the structural design is unreasonable, they will not be able to effectively protect the accident vehicles, and serious vehicle obstruction is very likely to occur.

[0006] In the existing technology, the expansion joint of the bridge is assembled by a rubber sealing strip, a steel side beam and an anchor. The expansion joint is made of selected chloroprene rubber material and is suitable for installation in areas with a temperature between -25 and +60 degrees Celsius. It has the characteristics of sealing and water-stopping, flexible expansion and contraction, smooth driving and durability.

[0007] In the prior art, Chinese invention patent number ZL201711440263.4, "A Bridge Expansion Joint Structure," discloses a bridge expansion joint structure comprising a bridge body and an expansion joint. The expansion joint divides the bridge body into a first bridge body and a second bridge body. The first bridge body has a first supporting step with a first fixing column, and the second bridge body has a second supporting step with a second fixing column. C-shaped steel plates are fixedly connected to the sides of the first and second supporting steps. An expansion joint connector is provided between the first and second bridge bodies. The expansion joint connector includes an upper supporting body and a lower supporting body, both of which are equipped with reinforcing ribs. A cover plate is provided above the expansion joint. An elastic filler material is filled between the expansion joint and the expansion joint connector. The purpose is to provide a bridge expansion joint structure that meets the requirements of road expansion and deformation, with a stable structure, good load-bearing capacity, and a smooth and comfortable driving experience.

[0008] Based on the above content, the main problems existing in the existing technology are: the load conditions faced by the expansion joints of bridges in the existing technology are complex, and many structural positions are facing problems, such as excessive expansion and contraction of the expansion joints of bridges, cracking or extrusion of rubber strips, fracture of bridge expansion joints and cracks and fractures of anchored concrete; the reason is that the expansion joints of bridges are not heavy-duty enough, and the force division between the load-bearing structure and displacement control of the expansion joints of bridges needs to be improved to ensure the safety and uniform displacement of the bridge when under stress. Summary of the Invention

[0009] The present invention aims to solve the technical problems in the prior art that the load conditions faced by bridge expansion joints are complex and many structural positions are faced with problems, and provides a bridge expansion joint structure and an installation and construction method thereof.

[0010] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0011] A bridge expansion joint structure, comprising:

[0012] A laterally retractable member capable of extending to a preset distance on either side thereof;

[0013] An expansion joint structure part, wherein a group of the expansion joint structure parts are arranged on both sides of the component body, each group of the expansion joint structure parts is connected to a corresponding embedded part, and the embedded part can be embedded in the concrete paving layer;

[0014] A strength support member, which is used to support the component body and can provide continuous support for the component body during the expansion and contraction process of the component body; and

[0015] A balance adjustment structure is connected to the component body and can track the embedded parts on one side so that the balance of the component body can be maintained when the strength support part breaks under telescopic displacement.

[0016] Specifically, the component body includes:

[0017] Comb teeth and comb teeth matching parts;

[0018] The main body can be filled with a buffer material block, wherein the buffer material block is a polystyrene foam plastic structure block;

[0019] The body has an upper plate, and a rail connection portion is provided on the upper plate;

[0020] The lower surfaces of the comb-tooth member and the comb-tooth matching member can be track-connected to the upper plate.

[0021] Specifically, the comb teeth fitting is formed with a plurality of equally spaced gaps;

[0022] The comb tooth member has a plurality of bar-shaped teeth;

[0023] Both sides of the bar-shaped teeth can be connected to the track-connecting wheels;

[0024] The connecting wheel can form a track connection between the comb tooth fitting and the comb tooth member, so that the comb tooth member and the comb tooth fitting can move away from or approach relative to the body.

[0025] Specifically, the expansion joint structure includes:

[0026] a side beam having a first connecting span located on one side thereof and a second connecting span connected above the side beam; and

[0027] The overhang portion extends horizontally toward the prefabricated gap.

[0028] Specifically, the expansion joint structure also includes:

[0029] a first telescopic structural connection portion formed on the second connection extension;

[0030] A second telescopic structural connection portion is formed on a side of the comb tooth member and the comb tooth matching member away from the center of the prefabricated gap;

[0031] The first telescopic structure connection part and the second telescopic structure connection part form a C-shaped or F-shaped installation space, so that a rubber plate can be installed in the installation space to limit the installation space, so that the two sides of the component body are respectively connected to the embedded parts on both sides through the rubber plate.

[0032] Specifically, the embedded parts include:

[0033] a first connecting rib, which is configured in a U shape, with a first U-shaped end connected to one side of the first connecting extension;

[0034] The second U-shaped end of the first connecting rib is connected to the overhanging portion;

[0035] One end of the second connecting rib is connected to the U-shaped recess of the first connecting rib, and the other end is connected to the second connecting rib;

[0036] The third connecting rib is constructed in an H-shape and partially overlaps and connects with the first connecting rib.

[0037] Specifically, the body has a lower plate;

[0038] A counterweight block is welded on the lower plate, and a horizontally arranged guide column is provided below the counterweight block;

[0039] A guide sleeve is provided on the guide post, and the guide sleeve is movable along the length direction of the guide post; and

[0040] Two sets of tension springs connect the guide sleeve and the lower plate.

[0041] Specifically, the strength support member includes:

[0042] A rotating seat, arranged on the guide sleeve;

[0043] Two sets of first hinge rods, the first ends of which are rotatably connected to the rotating base, and the second ends of which are rotatably connected to a second hinge rod respectively;

[0044] The second ends of the second hinge rods are respectively rotatably connected to a movable seat;

[0045] The movable seat is fixedly connected below the corresponding overhanging portion.

[0046] Specifically, the balance adjustment structure includes:

[0047] a balancing moving block fixedly connected to one of the overhanging portions;

[0048] The balancing moving block has a balancing hole arranged transversely;

[0049] A balance rod is provided on one side of the counterweight block, and the balance rod can be inserted into the balance hole.

[0050] In addition, the present application also provides an installation and construction method using the bridge expansion joint structure as described above, specifically comprising:

[0051] S1. Pre-connect the component body 10, the expansion joint structure 20, the strength support member 40, and the balance adjustment structure 50, and inspect the surface specifications of each component to see if there is any damage or scratching;

[0052] S2. Keep the construction workpiece and construction site clean, carry out the embedded parts 30 steel bars of the bridge expansion joint pre-embedded work, after completion of the pre-embedding, adjust and fix according to the construction requirements, ensure that there is no deviation, and then carry out the embedded steel bar welding work;

[0053] S3. During installation, check whether the embedded steel bars in the slot are cracked or broken. If not, take remedial measures. The embedded steel bars should be firmly welded to the anchor rings of the expansion joints. If deformation of the steel beams or inconsistent spacing is found, they should be repaired.

[0054] S4. If the road surface is paved first and then the expansion joint is installed, the elevation should be controlled so that the asphalt does not contaminate the embedded steel bars.

[0055] The present invention has the following beneficial effects:

[0056] The advantage of this technical solution is that it can cope with, for example, vertical longitudinal loads, horizontal tangential loads, and takes into account ductility and support strength, so that this technical solution can better cope with comprehensive loads, and the configuration of the above structure improves the heavy-duty level of the bridge expansion joint, and the force division between the load-bearing structure and displacement control of the bridge expansion joint is improved, thereby ensuring the safety and uniform displacement of the bridge when under stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] Figure 1 It is a structural schematic diagram of the present invention;

[0059] Figure 2 It is a partial enlarged schematic diagram of the expansion joint structure of the present invention;

[0060] Figure 3 A schematic structural diagram of the comb teeth matching piece of the component body of the present invention;

[0061] Figure 4 Schematic diagram of the track connection method of the present invention.

[0062] The reference numerals in the figures indicate:

[0063] Component body 10, expansion joint structure 20, embedded parts 30, strength support parts 40, balance adjustment structure 50;

[0064] Comb teeth 110, comb teeth matching piece 120, body 100, upper plate 101, rail connection part 102;

[0065] Gap 121, bar teeth 111, track-connecting wheel 112;

[0066] Side beam 200, first connecting extension 201, second connecting extension 202;

[0067] overhang 203;

[0068] A first telescopic structure connection portion 210 and a second telescopic structure connection portion 220;

[0069] First connecting rib 301, second connecting rib 302, third connecting rib 303;

[0070] Lower plate 130, guide post 132, guide sleeve 133, tension spring 134;

[0071] Rotating seat 401, first hinge rod 410, second hinge rod 420;

[0072] Balance moving block 510 , balance hole 511 , balance rod 512 . DETAILED DESCRIPTION

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention; it should be noted that in this application, for the convenience of description, the "left side" in the current view is referred to as the "first end", the "right side" is referred to as the "second end", the "upper side" is referred to as the "first end", and the "lower side" is referred to as the "second end". The purpose of such description is to clearly express the technical solution, and it should not be understood as an improper limitation on the technical solution of this application.

[0074] The main problems existing in the existing technology are: the load conditions faced by the expansion joints of bridges in the existing technology are complex, and many structural positions are facing problems, such as excessive expansion and contraction of the expansion joints, cracking or extrusion of rubber strips, fracture of the expansion joints, and cracks and fractures of the anchored concrete; the reason is that the expansion joints of bridges are not heavy-duty enough, and the force division between the load-bearing structure and displacement control of the expansion joints of bridges needs to be improved to ensure the safety and uniform displacement of the bridge when under stress.

[0075] In this technical solution, please refer to Figure 1 、 2As shown, the bridge expansion joint structure includes: a laterally retractable component body 10, which can extend a preset distance to both sides thereof to cope with the lateral force generated by the tires when the vehicle passes, and has the function of being retractable, reflecting the characteristics of the expansion joint. Furthermore, an expansion joint structural part 20 is designed, and a group of expansion joint structural parts 20 are arranged on both sides of the component body 10. Each group of expansion joint structural parts 20 is connected to an embedded part 30, and the embedded part 30 can be embedded in the concrete pavement; to provide an anchoring pre-embedded connection method, and the expansion joint structural part 20 is designed using the principle of rubber strip expansion joint, so that it can cooperate with the component body 10, and the expansion joint structural part 20 mainly provides ductility during the telescopic movement; in terms of strengthening the structural strength, a strength support member 40 is designed to support the component body 10, and can It provides continuous support for the component body 10 during the expansion and contraction process, and can also provide support force to balance the vibration force generated in the longitudinal direction, which is mainly the accumulation of force generated by the periodic passage of vehicles; and a balance adjustment structure 50, which connects the component body 10 and can track the embedded parts 30 on one side of the connection, so that the strength support part 40 can maintain the balance of the component body 10 when it breaks under the expansion and contraction displacement; through the above design method, the present technical solution can cope with, for example, vertical longitudinal loads, horizontal tangential loads, and consider ductility and support strength, so that the present technical solution can better cope with comprehensive loads, and the configuration of the above structure improves the heavy-duty degree of the bridge expansion joint, and the force division between the load-bearing structure and displacement control of the bridge expansion joint is improved, thereby ensuring the safety and uniform displacement of the bridge when under stress.

[0076] In a specific embodiment, see Figure 1 、 2 As shown in Figure 3, the component body 10 includes: a comb tooth piece 110 and a comb tooth matching piece 120; a main body 100, the interior of which can be filled with a buffer material block, which is a polystyrene foam plastic structural block; the main body 100 has an upper plate 101, and a rail connection portion 102 is provided on the upper plate 101; the lower surfaces of the comb tooth piece 110 and the comb tooth matching piece 120 can be rail-connected to the upper plate 101.

[0077] In a specific embodiment, see Figure 1 、 2As shown in FIG3 , the comb tooth fitting 120 is formed with a plurality of equidistant gaps 121; the comb tooth member 110 has a plurality of bar teeth 111; both sides of the bar teeth 111 can be tracked with the track-connecting wheel 112; the track-connecting wheel 112 can track the comb tooth fitting 120 and the comb tooth member 110 so that the comb tooth member 110 and the comb tooth fitting 120 can be moved away from or closer to the main body 100; in this way, the principle of telescopic operation is realized, and the cooperation action of the track-connecting wheel 112 reduces the maintenance cost of the structure to ensure the sustainability of the telescopic operation. Even under the influence of dust, the rolling of the track-connecting wheel 112 can remove the attached dust and achieve the purpose of self-cleaning.

[0078] In a specific embodiment, see Figure 1 、 2 As shown, the expansion joint structure 20 includes: a side beam 200 having a first connecting extension 201 located on one side thereof and a second connecting extension 202 connected thereto; and an overhang portion 203 extending horizontally toward the prefabricated gap 3 .

[0079] In a specific embodiment, see Figure 1-4 As shown, the expansion joint structure 20 further includes: a first telescopic structural connection portion 210, which is formed on the second connection extension 202; a second telescopic structural connection portion 220, which is formed on a side of the comb tooth member 110 and the comb tooth matching member 120 away from the center of the prefabricated gap 3; the first telescopic structural connection portion 210 and the second telescopic structural connection portion 220 form a C-shaped or F-shaped installation space, so that a limiting rubber plate 240 can be installed in the installation space, so that both sides of the component body 10 are connected to the embedded parts 30 on both sides through the rubber plate 240. The rubber plate 240 can be a rubber sealing strip in the prior art.

[0080] In a specific embodiment, see Figure 1-4 As shown, the embedded part 30 includes: a first connecting rib 301, which is constructed in a U shape, and its first U-shaped end is connected to one side of the first connecting extension 201; the second U-shaped end of the first connecting rib 301 is connected to the overhang 203; a second connecting rib 302, one end of which is connected to the U-shaped recess of the first connecting rib 301, and the other end of which is connected to the second connecting extension 202; a third connecting rib 303, which is constructed in an H shape, and its part overlaps and is connected to the first connecting rib 301; such a design makes the entire embedded anchoring system safer and more reliable, and convenient for actual construction.

[0081] In a specific embodiment, see Figure 1-4As shown, the body 100 has a lower plate 130; a counterweight 131 is welded on the lower plate 130, and a horizontally arranged guide column 132 is provided below the counterweight 131; a guide sleeve 133 is provided on the guide column 132, and the guide sleeve 133 can move along the length direction of the guide column 132; and two sets of tension springs 134 connecting the guide sleeve 133 and the lower plate 130; the counterweight 131 embodies the heavy-duty configuration feature, and the cooperation of the tension spring, the guide sleeve 133 and the guide column 132 makes the body 100 more stable; in particular, when expansion and contraction occur, the strength support member 4 0 includes: a rotating base 401, which is disposed on the guide sleeve 133; two sets of first hinge rods 410, each having a first end rotatably connected to the rotating base 401 and a second end rotatably connected to a second hinge rod 420; the second ends of the second hinge rods 420 are each rotatably connected to a movable base 430; the movable base 430 is fixedly connected below the corresponding overhang portion 203; the first hinge rods 410 and the second hinge rods 420 can provide a support function when expanding and retracting without affecting the extension and retraction, providing a stable supporting force, while the tension spring 134 provides a rebound force to facilitate the return to the initial support position.

[0082] In a specific embodiment, see Figure 1-4 As shown, the balance adjustment structure 50 includes: a balance moving block 510, which is fixedly connected to an overhang portion 203; the balance moving block 510 has a horizontally arranged balance hole 511; a balance rod 512 is provided on one side of the counterweight block 131, and the balance rod 512 can be inserted into the balance hole 511; the main function of the balance adjustment structure 50 is: the above designs are all conventional loads, and when subjected to impact loads with irregular directions, such as sudden instantaneous collisions, the balance adjustment structure 50 can ensure the stability of the overall structure and reduce the probability of damage by sudden loads.

[0083] In addition, the present application also provides an installation and construction method using the bridge expansion joint structure as described above, specifically comprising:

[0084] S1. Pre-connect the component body 10, the expansion joint structure 20, the strength support member 40, and the balance adjustment structure 50, and inspect the surface specifications of each component to see if there is any damage or scratching;

[0085] S2. Keep the construction workpiece and construction site clean, carry out the embedded parts 30 steel bars of the bridge expansion joint pre-embedded work, after completion of the pre-embedding, adjust and fix according to the construction requirements, ensure that there is no deviation, and then carry out the embedded steel bar welding work;

[0086] S3. During installation, check whether the embedded steel bars in the slot are cracked or broken. If not, take remedial measures. The embedded steel bars should be firmly welded to the anchor rings of the expansion joints. If deformation of the steel beams or inconsistent spacing is found, they should be repaired.

[0087] S4. If the road surface is paved first and then the expansion joint is installed, the elevation should be controlled so that the asphalt does not contaminate the embedded steel bars.

[0088] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A bridge expansion joint structure, characterized in that: include: A laterally retractable component body (10) capable of extending to a preset distance on both sides thereof; An expansion joint structure (20), wherein a group of the expansion joint structure (20) is respectively arranged on both sides of the component body (10), each group of the expansion joint structure (20) is connected to a corresponding embedded part (30), and the embedded part (30) can be embedded in the concrete paving layer; a strength support member (40) for supporting the component body (10) and capable of providing continuous support for the component body (10) during the process of expansion and contraction of the component body (10); and a balance adjustment structure (50) connected to the component body (10) and capable of track-connecting the embedded part (30) on one side, so that the balance of the component body (10) can be maintained when the strength support part (40) breaks under telescopic displacement; The expansion joint structure (20) comprises: A side beam (200) having a first connecting extension (201) located on one side thereof and a second connecting extension (202) connected thereto above; and an overhanging portion (203) extending horizontally in a direction toward the prefabricated gap (3); The component body (10) comprises: Comb tooth member (110) and comb tooth matching member (120); A main body (100) whose interior can be filled with a buffer material block, wherein the buffer material block is a polystyrene foam plastic structural block; The body (100) has an upper plate (101), and a rail connection portion (102) is provided on the upper plate (101); The lower surfaces of the comb tooth piece (110) and the comb tooth matching piece (120) can be track-connected to the upper plate (101); The body (100) has a lower plate (130); A counterweight block (131) is welded to the lower plate (130), and a horizontally arranged guide column (132) is provided below the counterweight block (131); A guide sleeve (133) is provided on the guide post (132), and the guide sleeve (133) is capable of moving along the length direction of the guide post (132); and Two sets of tension springs (134) connecting the guide sleeve (133) and the lower plate (130); The balance adjustment structure (50) includes: a balancing moving block (510) fixedly connected to one of the overhanging portions (203); The balancing moving block (510) has a balancing hole (511) arranged transversely; A balancing rod (512) is provided on one side of the counterweight block (131), and the balancing rod (512) can be inserted into the balancing hole (511).

2. The bridge expansion joint structure according to claim 1, characterized in that: The comb tooth fitting (120) is formed with a plurality of equally spaced gaps (121); The comb tooth member (110) has a plurality of bar-shaped teeth (111); Both sides of the bar-shaped teeth (111) can be connected to the track-connecting wheels (112); The connecting wheel (112) can form a track connection between the comb tooth fitting part (120) and the comb tooth part (110), so that the comb tooth part (110) and the comb tooth fitting part (120) can move away from or approach each other relative to the body (100).

3. The bridge expansion joint structure according to claim 2, characterized in that: The expansion joint structure (20) further comprises: a first expansion joint connecting portion (210) formed on the second connecting portion (202); A second telescopic structure connection portion (220) formed on a side of the comb tooth member (110) and the comb tooth matching member (120) away from the center of the prefabricated gap (3); The first telescopic structure connection part (210) and the second telescopic structure connection part (220) form a C-shaped or F-shaped installation space, so that a limiting rubber plate (240) can be installed in the installation space, so that the two sides of the component body (10) are respectively connected to the embedded parts (30) on both sides through the rubber plate (240).

4. The bridge expansion joint structure according to claim 3, characterized in that: The embedded part (30) comprises: a first connecting rib (301) configured in a U-shape, wherein a first U-shaped end thereof is connected to one side of the first connecting rib (201); The second U-shaped end of the first connecting rib (301) is connected to the overhanging portion (203); One end of the second connecting rib (302) is connected to the U-shaped recess of the first connecting rib (301), and the other end is connected to the second connecting rib (202); A third connecting rib (303) is constructed in an H-shape, and partially overlaps and connects to the first connecting rib (301); The strength support member (40) comprises: A rotating seat (401) is provided on the guide sleeve (133); Two sets of first hinge rods (410), the first ends of which are rotatably connected to the rotating base (401), and the second ends of which are rotatably connected to a second hinge rod (420); The second ends of the second hinge rods (420) are rotatably connected to a movable seat (430); The movable seat (430) is fixedly connected below the corresponding overhanging portion (203).

5. The installation and construction method of the bridge expansion joint structure according to claim 4 is characterized in that: S1, pre-connecting the component body (10), the expansion joint structure (20), the strength support member (40), and the balance adjustment structure (50), and inspecting the surface specifications of each component to see if there is damage or scratches; S2. Keep the construction workpiece and construction site clean, and carry out the pre-embedded steel bars of the bridge expansion joint (30). After the pre-embedding is completed, adjust and fix according to the construction requirements, and after ensuring that there is no deviation, carry out the pre-embedded steel bar welding work; S3. During installation, check whether the embedded steel bars in the slot are cracked or broken. If not, take remedial measures. The embedded steel bars should be firmly welded to the anchor rings of the expansion joints. If deformation of the steel beams or inconsistent spacing is found, they should be repaired. S4. If the road surface is paved first and then the expansion joint is installed, the elevation should be controlled so that the asphalt does not contaminate the embedded steel bars.

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