Bridge mutual support type seismic expansion joint

Abstract

The application relates to a bridge mutual support type anti-seismic expansion joint which comprises an expansion joint base, a waterproof device and a tooth beam body assembly; the expansion joint base comprises C-shaped sleeper beams; the tooth beam body assembly comprises a first tooth beam body of a blocking groove rod and a second tooth beam body; the first tooth beam body and the second tooth beam body are arranged in an interlaced mode opposite to each other along the sleeper beams; the first tooth beam body is provided with a supporting shaft and a connecting head; the first tooth beam body is in an I-shaped cross section, and the first tooth beam body is provided with a sliding groove; the blocking groove rod comprises a sliding rod and a second supporting shaft; the tooth beam body assembly further comprises spring sheets and spring sheet fixing shafts; the waterproof device comprises a flow guide plate, a cover plate, an inflatable rubber capsule and a water stop belt; the application has the beneficial effects that: the expansion joint base and the tooth beam body assembly arranged in the expansion joint base are arranged; when the bridge is deformed, the tooth beam bodies can be expanded and contracted between the two sleeper beams, and the expansion and contraction of the bridge can be absorbed; the tooth beam bodies are mutually supported and stressed, and the first and second tooth beam bodies are double-axially supported, loaded and expanded and contracted.

Description

Technical Field

[0001] This invention relates to the field of expansion joint technology, and in particular to bridge interlocking seismic expansion joints. Background Technology

[0002] The most advanced expansion joints currently used on highway bridges are the Maurer expansion joints produced by the German company Maurer. They are characterized by double-axle support and one expansion joint to accommodate the load and expansion of passing vehicles, but there are still many problems that need to be solved.

[0003] 1. Structurally, it consists of uniformly arranged horizontal beams with gaps between them. These gaps open and close evenly during expansion and contraction. However, a drawback is that when the gaps widen, it can cause vehicle bouncing and vibration. Additionally, the waterstops installed in the gaps between the beams are prone to localized damage. Hard particles or debris falling into the gaps can easily damage the waterstops, causing scratches or even punctures. Furthermore, it is susceptible to climatic influences. Prolonged exposure to wind and sun, combined with high temperatures or freezing, can easily cause the rubber waterstops to age and fail to provide long-term protection for the concrete structure and supports.

[0004] 2. Principle, Function, and Manufacturing Process: The principle and function are basically normal. However, a common problem in Maurer expansion joints used in highways is cracking and breaking of the central crossbeam. This is due to the structural principle, as there is a certain distance between the bottom crossbeams. The manufacturing process is flawed due to numerous procedures, high labor costs, many parts, complex installation, and inconvenient transportation. In recent years, some double-axis supported integral expansion joints have been invented, but they do not achieve the desired seismic resistance because the bottom surface of the integral expansion joint is in contact with concrete, failing to form a complete suspended structure and thus failing to meet seismic requirements.

[0005] 3. Commonly used toothed plate expansion joints have the following defects: First, the toothed plate itself is subjected to unreasonable stress, the expansion and contraction should not be too large, and it cannot undergo three-dimensional displacement. When one side of the expansion joint rises or falls, tooth warping is likely to occur. Second, due to the load and impact of passing vehicles, and the influence of temperature, the reinforcing bolts are prone to loosening and tooth warping, affecting the driving safety of passing vehicles. Third, leaks are difficult to repair, affecting the service life of the bridge. Fourth, large expansion joints are not easy to use; when they form a fan shape, experience settlement, or undergo unilateral lateral displacement, tooth warping is also likely to occur.

[0006] Most existing expansion joint structures are made of two toothed plates interlocked together. Over time, if one toothed plate settles, the interlocked toothed plates will lift up, which can damage tires and cause accidents when vehicles pass over them.

[0007] Among existing Chinese patents, the closest prior art is patent application number CN202022587875.X, entitled "A Waterproof Structure Bridge Expansion Joint," which discloses a structure including a bridge, a bridge deck, and an expansion joint. The top of the bridge is provided with a foam waterproof layer, and the bottom of the foam waterproof layer is provided with a drainage pipe. Perforations are opened on the outer wall of the bridge, through which the drainage pipe passes and extends outwards. Cement mortar is laid on top of the foam waterproof layer, and granite is laid on top of the cement mortar. The expansion joint... The expansion joint is fitted with a waterproof rubber strip on the outside, and the interior of the expansion joint is filled with a waterproof rubber layer. A waterproof cloth is installed at the top of the expansion joint, and a waterproof cover is installed at the top of the bridge deck. A first shock absorber is installed at the bottom of the waterproof cover, and a spring is fixedly connected to the bottom of the first shock absorber. A second shock absorber is fitted around the circumference of the first shock absorber. A testing instrument is installed on the inner bottom wall of the bridge. Although the rubber strip filling the expansion joint on the outside of this patent can make it waterproof, the expansion joint will become unstable. Repeated vehicle traffic will affect the life of the expansion joint, which needs to be addressed.

[0008] Patent application number CN202122748122.7, entitled "Bridge Expansion Joint Device," discloses a device including an expansion joint shielding mechanism and a supporting beam resting on a shock-absorbing mechanism. The shock-absorbing mechanism comprises a housing, a cover, a clamping device on the beam support end, a pad, and a lower support device on the beam support end. The housing is mounted on the bridge beam, and the cover is fitted onto the housing. The clamping device on the beam support end includes a wear-resistant clamping plate and a clamping support. The block and pad are stacked on top of the support block on the crossbeam support end, and the lower support device of the crossbeam support end includes the wear-resistant support plate of the crossbeam support end and the pressure-bearing support block of the crossbeam support end; the expansion joint shielding mechanism is fixed to the middle of the support crossbeam and the box cover; the pressure-bearing support block and the pressure-bearing support block of the crossbeam support end are polyurethane blocks, and the pressure-resistant plate and the wear-resistant support plate of the crossbeam support end are polytetrafluoroethylene plates; this patent solves the problem of earthquake resistance, but it is not easy to replace, which needs to be addressed. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a bridge toothed beam inter-braced seismic expansion joint, which improves the load-bearing capacity of the expansion joint, the positive bending moment resistance of the toothed beam, the shear resistance of the support point, and the traffic safety of the bridge; and extends the service life and comfort of the expansion joint and the bridge.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0011] A bridge interlocking seismic expansion joint includes an expansion joint base and a toothed beam assembly disposed within the expansion joint base; the expansion joint base includes a bolster beam pre-embedded in the bridge concrete layer; there are two bolster beams; the bolster beams are respectively disposed on both sides of the expansion joint; the toothed beam assembly is hinged to the bolster beams on both sides.

[0012] Furthermore, the bolster beam includes a bolster beam body, a bolster beam foot, and a support shaft groove; the bolster beam body is fixedly connected to the bolster beam foot; the bolster beam body is provided with a support shaft groove; the support shaft groove is C-shaped; the two C-shaped support shaft grooves are arranged opposite each other.

[0013] Furthermore, the toothed beam assembly includes a first toothed beam and a second toothed beam; the first toothed beam and the second toothed beam are arranged alternately and oppositely along the bolster beam;

[0014] The lengths of both the first and second toothed beams are greater than half the distance between the two bolster beams;

[0015] One end of the first toothed beam is hinged to the support shaft groove of the side bolster beam.

[0016] One end of the second toothed beam is hinged to the support shaft groove of the bolster beam on the other side;

[0017] The first tooth beam body and the second tooth beam body have the same structure;

[0018] The other end of the first toothed beam can slide on the second toothed beam;

[0019] The other end of the second toothed beam can slide on the first toothed beam.

[0020] Furthermore, one end of the first toothed beam is provided with a support shaft that is hinged to the support shaft groove; the other end of the first toothed beam is provided with an upper sliding support, a lower sliding load support, and a retaining rod groove.

[0021] The first tooth beam has an I-shaped cross-section, and the I-shaped cross-section of the first tooth beam is provided with a groove and a sliding surface;

[0022] The lower sliding load support of the second toothed beam overlaps in the sliding groove of the adjacent first toothed beam; the upper sliding support of the second toothed beam abuts against the sliding surface of the adjacent first toothed beam.

[0023] The lower sliding load support of the first toothed beam overlaps in the sliding groove of the adjacent second toothed beam; the upper sliding support of the first toothed beam abuts against the sliding surface of the adjacent second toothed beam.

[0024] The support shaft can be limited to rotate within the support shaft groove.

[0025] The toothed beam assembly further includes a grooved rod that is inserted into the grooved rod slide of the first toothed beam; the grooved rod includes a slide rod and a second support shaft provided at one end of the slide rod;

[0026] The second support shaft is fixedly connected to the slide rod via a journal;

[0027] There are two slide rods; they are respectively located on both sides of the journal; the slide rods are movably inserted into the slide groove of the retaining rod;

[0028] The second support shaft is hinged to the support shaft groove.

[0029] Furthermore, the second toothed beam is provided with a retaining rod.

[0030] Furthermore, the toothed beam assembly also includes a spring plate and a spring plate fixing shaft; both the first toothed beam and the second toothed beam are provided with spring plate fixing holes;

[0031] The spring plate fixing shaft is installed in the spring plate fixing hole;

[0032] Both ends of the spring sheet are respectively sleeved with the spring sheet fixing shaft.

[0033] Furthermore, it also includes a waterproof device installed on the base of the pillow beam; the waterproof device includes a guide plate, a cover plate, an inflatable rubber bladder, and a water-stop strip;

[0034] The guide plate consists of two pieces, which are fixedly connected to the bolster feet on both sides respectively; the upper part of the two guide plates away from the bolster feet is fixedly connected by a cover plate; the lower part of the guide plate away from the bolster feet is provided with an inflatable rubber bladder; a water-stop strip is provided between the inflatable rubber bladders.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. An expansion joint base and a toothed beam assembly within the expansion joint base; the expansion joint base includes a bolster beam embedded in the bridge concrete layer; there are two bolster beams; the bolster beams are respectively located on both sides of the expansion joint; both ends of the toothed beam assembly are hinged to the bolster beams on both sides; the toothed beam assembly comprises a first toothed beam and a second toothed beam; the first toothed beam and the second toothed beam are staggered and opposite to each other along the bolster beams; the length of both the first toothed beam and the second toothed beam is greater than half the distance between the two bolster beams; one end of the first toothed beam is hinged to the support shaft groove of one side of the bolster beam; one end of the second toothed beam is hinged to the support shaft groove of the other side of the bolster beam; the first toothed beam and the second toothed beam have the same structure; when the bridge deforms, the first toothed beam and the second bolster beam within the expansion joint can expand and contract between the two bolster beams, absorbing the expansion and contraction changes of the bridge; the toothed beams mutually support each other, and the toothed beams provide biaxial support for load and expansion / contraction;

[0037] 2. Since the length of each tooth beam is shorter than the distance between two bolster beams, there is a gap at the end of the bolster beam and the tooth beam, which can damage the vehicle. This defect can be compensated by setting a retaining rod.

[0038] 3. By setting a retaining rod, one end of the retaining rod is set in the C-shaped groove of the bolster beam on one side, and the other end is inserted into the sliding groove of the opposite tooth beam body, filling the gap between the tooth beam bodies and preventing the vehicle from bumping.

[0039] 4. The waterproof device prevents rainwater from corroding the expansion joint and causing premature damage to the expansion joint components; the two sides of the waterstop are inflated and sealed tightly to prevent water leakage.

[0040] 5. If the toothed beam is damaged and needs to be replaced after the road is opened to traffic, it can be replaced by pushing it from outside the guardrail. It can be done manually or with a jack. Manually, several toothed beams can be moved forward along the support groove. If a jack is used, the entire toothed beam of the expansion joint can be pushed forward. Attached Figure Description

[0041] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0042] Figure 2 This is a three-dimensional exploded view illustrating the structure of the present invention;

[0043] Figure 3 This is a schematic diagram of the toothed beam installation process of the present invention;

[0044] Figure 4 This is a schematic front view of the structure of the present invention;

[0045] Figure 5 This is a diagram illustrating the force principle of the present invention;

[0046] Figure 6 This is a schematic front view of the structure of the retaining rod;

[0047] Figure 7 This is a schematic top view of the structure of the retaining rod;

[0048] Figure 8 This is a schematic diagram of the spring sheet structure;

[0049] Figure 9 This is a schematic diagram of the structure of the spring sheet after it has been stretched.

[0050] Figure 10 This is a schematic front view of the sleeper beam structure;

[0051] Figure 11 Left view of the sleeper beam structure;

[0052] Figure 12 This is a schematic front view of the first toothed beam.

[0053] Figure 13 This is a schematic top view of the first toothed beam.

[0054] Figure 14 Figure 12A schematic diagram of direction A;

[0055] Figure 15 for Figure 12 Sectional view at point B;

[0056] Figure 16 This is a diagram showing the usage state of the invention after settlement of a single-sided bolster beam;

[0057] Figure 17 This is a diagram showing the toothed beam in its first usage state on the bolster beam.

[0058] Figure 18 This is a diagram showing the second usage state of the toothed beam on the bolster beam.

[0059] Explanation of figure numbers in attached drawings:

[0060] 10-First toothed beam body, 11-slide groove, 12-support shaft, 13-upper sliding support, 14-sliding load support, 15-barrier rod slide groove, 16-spring plate fixing hole, 17-sliding surface, 20-pillow beam, 21-pillow beam body, 22-pillow beam foot, 23-support shaft groove, 30-barrier rod, 31-second support shaft, 32-journal, 33-slide rod, 34-spring plate, 35-spring plate fixing shaft, 40-waterstop, 41-inflatable rubber bladder, 43-cover plate, 44-guide plate. Detailed Implementation

[0061] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0062] Example 1

[0063] Please see Figures 1-18 As shown,

[0064] Please see Figures 1-18 As shown,

[0065] This embodiment provides a bridge interlocking seismic expansion joint, including an expansion joint base, a toothed beam assembly disposed within the expansion joint base, and a waterproofing device; the expansion joint base includes a bolster beam 20 embedded in the bridge concrete layer; there are two bolster beams 20; the bolster beams 20 are respectively disposed on both sides of the expansion joint and arranged along the length direction of the expansion joint; the toothed beam assembly is hinged to the bolster beams 20 on both sides respectively.

[0066] In the concrete where expansion joints are required in the bridge design, after the design drawings are laid out on site, C-shaped sleeper beams 20 and drainage systems (which are existing technologies and are not shown in the drawings) are installed. The width between two C-shaped sleeper beams 20 is determined according to the designed values. After the sleeper beams 20 are in place, they are connected and reinforced with steel bars. Then, a waterproofing device is installed.

[0067] like Figure 11 As shown, the bolster beam 20 includes a bolster beam body 21, a bolster beam foot 22, and a support shaft groove 23; the bolster beam body 21 is fixedly connected to the bolster beam foot 22; the bolster beam body 21 is provided with a support shaft groove 23; the cross-section of the support shaft groove 23 is C-shaped; the two C-shaped support shaft grooves 23 are arranged opposite to each other.

[0068] More detailed technical solution: the bolster body 21, bolster foot 22 and support shaft groove 23 are integrally cast, making them sturdy and durable;

[0069] like Figure 1-2 As shown, the toothed beam assembly includes a first toothed beam 10 and a second toothed beam; the first toothed beam 10 and the second toothed beam are staggered and opposite to each other along the length direction of the bolster beam 20; the length of the first toothed beam 10 and the length of the second toothed beam are both greater than half the distance between the two bolster beams 20; this facilitates sliding insertion between the two toothed beams; after repeated tests, the length of the first toothed beam 10 and the second toothed beam is most suitable as 2 / 3 of the distance between the two bolster beams 20; too long wastes material, and too short results in unreasonable stress distribution;

[0070] like Figure 17-18 As shown, one end of the first toothed beam 10 is hinged to the support shaft groove 23 of the bolster beam 21 on the same side; one end of the second toothed beam is hinged to the support shaft groove 23 of the bolster beam 21 on the same side; the first toothed beam 10 and the second toothed beam have the same structure, but this is only for the sake of description.

[0071] like Figure 15 As shown, the first tooth beam 10 has an I-shaped cross section, and the I-shaped cross section of the first tooth beam 10 is provided with a groove 11 and a sliding surface 17.

[0072] One end of the first toothed beam 10 is provided with a support shaft 12 that is hinged to the support shaft groove 23; the other end of the first toothed beam 10 is provided with a snap-fit ​​joint.

[0073] The interlocking joint includes an upper sliding support 13, a lower sliding load support 14, and a retaining rod groove 15; the lower sliding load support 14 of the adjacent second toothed beam overlaps with the upper sliding support 13 on the first toothed beam 10 and extends toward the groove 11.

[0074] The lower sliding load support 14 of the second toothed beam overlaps in the sliding groove 11 of the adjacent first toothed beam 10; the upper sliding support 13 of the second toothed beam abuts against the sliding surface 17 of the adjacent first toothed beam 10.

[0075] The lower sliding load support 14 of the first toothed beam 10 overlaps in the sliding groove 11 of the adjacent second toothed beam; the upper sliding support 13 of the first toothed beam 10 abuts against the sliding surface 17 of the adjacent second toothed beam.

[0076] The support shaft 12 can be rotated within the support shaft groove 23 (detailed explanation below);

[0077] like Figure 17-18 As shown, after the expansion joint is installed, the support shaft 12 of the first toothed beam 10 can rotate within a certain range in the support shaft groove 23. The angle at which the open end of the toothed beam away from the bolster beam 20 can rotate upward is a, and the maximum value of a is 10 degrees; the angle at which the open end of the toothed beam away from the bolster beam 20 can rotate downward is b, and the maximum value of b is 10 degrees.

[0078] The toothed beam assembly also includes a grooved rod 30 that is slidably connected to the grooved rod slide 15 on the first toothed beam 10; the grooved rod 30 includes a slide rod 33 and a second support shaft 31 provided at one end of the slide rod 33.

[0079] The second support shaft 31 and the slide rod 33 are fixedly connected by a journal 32;

[0080] There are two slide rods 33; they are respectively arranged on both sides of the journal 32; the slide rods 33 are movably inserted into the slide groove 15 of the retaining rod.

[0081] The second support shaft 31 is installed in the support shaft groove 23.

[0082] The open ends of both the first toothed beam 10 and the second toothed beam are slidably connected to the retaining rod 30.

[0083] like Figure 5 As shown, two adjacent toothed beams (the first toothed beam 10 and the second toothed beam) form mutual support, making the toothed beams and the toothed beams integrated. They can expand and contract along the width of the expansion joint and also withstand vertical impact loads. One expansion joint is supported by the support shafts 12 on both sides to withstand the impact load. After field tests, when one side of the support shaft 12 settles, the expansion joint remains on a plane and does not deform. At the same time, it can still be used normally when there are multiple changes in multiple directions. For example, the support shaft 12 can slide in the support shaft groove 23, fan out (that is, the two bolster beams 20 are not parallel), tilt, and settle at one end (that is, the bolster beam 20 on one side rises or falls). Therefore, it is a seismic expansion joint. Field load tests show that it can withstand a single axle load of more than 310 tons from a vehicle.

[0084] like Figure 3 As shown, the installation method of the toothed beam and the retaining rod is as follows.

[0085] The first step is to assemble the retaining rod 30 and the first toothed beam 10; first, insert the retaining rod 30 into the retaining rod groove 15 of the first toothed beam 10;

[0086] The second step is to push the first toothed beam 10 and the retaining rod 30 assembly into the support shaft groove 23.

[0087] Third step, the second toothed beam body is combined with the retaining rod 30; the steps are the same as above; then the assembly is installed into the support shaft groove 23; the second toothed beam body and the first toothed beam body 10 are installed in a staggered manner;

[0088] The fourth step is to tilt the interlocking joint of the second toothed beam and insert the sliding support 13 on the interlocking joint into the lower sliding load support 14 of the first toothed beam 10 while tilting and rotating. The adjacent first toothed beams 10 and second toothed beams support each other and are pushed into the support shaft groove 23 one by one from one end of the pillow beam 20 to form an expansion joint.

[0089] The above installation method is called the jacking installation method. Its advantages are that it is sturdy, requires no welding, bolts, or joints, and the support shaft 12 of the toothed beam 10 can rotate 9 degrees safely. Firstly, it has an integral structure; secondly, maintenance is very safe, as it can be installed at the end of the expansion joint. When the toothed beam is damaged and needs replacement after the road is open to traffic, it can be replaced by jacking from outside the guardrail. This can be done manually or with a jack. Manually, several toothed beams 10 and the second toothed beam 10 are moved forward along the support shaft groove 23. With a jack, the entire toothed beam of the expansion joint can be pushed forward to complete the replacement, avoiding the previous need to close the lane for replacement.

[0090] It also includes a waterproof device installed on the pillow beam foot 22.

[0091] The technical effects of this device,

[0092] 1. Large elongation: The elongation value meets the range of 80-2400mm. The larger the elongation, the lower the corresponding cost.

[0093] 2. Simple structure: Multiple identical toothed beams are arranged in an orderly manner to support each other. They are pushed and slid in one by one along the C-shaped pillow beam groove (manually or with a jack) to form an expansion joint, thus completing the expansion function.

[0094] 3. Reasonable stress distribution: After multiple toothed beams are arranged in a corresponding order and support each other to form a whole, the axial force of the support shaft supports the vehicle load and impact.

[0095] 4. Meets seismic resistance requirements: It can undergo three-dimensional displacement, and can meet and adapt to the use of curved bridges, skew bridges and extra-large span bridges.

[0096] 5. Simple installation: First, fix the C-shaped bolster beams and drainage system. Calculate the expansion joint's expansion amount to determine the width between the two C-shaped bolster beams, then pour concrete for reinforcement. Installing one joint (three lanes wide, excluding concrete pouring) takes approximately one hour, requiring no bolts or welding.

[0097] 6. A waterstop strip is installed at the lower end of the expansion joint, and its height is 1 / 2 of that of the Maurer joint of the same specification.

[0098] 7. Quick repair: The toothed beam is the main component of the expansion joint. It is an assembly type and can be replaced in just one hour. It is very safe because the repair personnel do not need to go to the lane to replace it (when the road traffic volume is high) and can complete the replacement from the outside of the guardrail.

[0099] 8. Good drainage: After the toothed beams support each other to form a telescopic beam plate, there is space under the beam plate, and a water-stop strip with airbags on both sides is provided.

[0100] 9. Low cost: The amount of steel used is half that of Maurer expansion joints. The main process is steel casting. The labor cost is one-fifth that of Maurer expansion joints and other expansion joints.

[0101] 10. Convenient transportation; products are bundled and packaged in fixed quantities according to usage, making loading and unloading very convenient, and easy to store and maintain.

[0102] The working process of this invention,

[0103] When a vehicle passes over the expansion joint of a bridge, such as Figure 5 As shown, the vehicle applies pressure to the toothed beam of the expansion joint. Two adjacent toothed beams (the first toothed beam 10 and the second toothed beam) form mutual support, making the toothed beams and the toothed beams a single unit. This allows for both expansion and contraction and can withstand impact loads. An expansion joint is supported by the support shafts 12 on both sides to withstand impact loads. Field tests show that when one support shaft 12 settles, the expansion joint remains on a single plane and does not deform as a whole. It also meets the requirements of multi-directional changes, such as single-axis slip (along the axial direction), fan-shaped movement, warping, and single-end settlement. Therefore, it is a seismic expansion joint. Field load tests show that it can withstand a single-axle load of more than 310 tons from a vehicle.

[0104] If the bolster beam on one side of the expansion joint settles, such as Figure 16 As shown, because the ends of the two toothed beams interlock, the ends of the toothed beams will not protrude, thus preventing the tires from being punctured by the iron bars of the original expansion joint, and improving the safety of the expansion joint structure.

[0105] Example 2

[0106] This embodiment has a basically the same structure as Embodiment 1.

[0107] The difference is that,

[0108] The waterproof device includes a flow guide plate 44, a cover plate 43, an inflatable rubber bladder 41, and a waterstop 40.

[0109] The guide plate 44 consists of two pieces, one end of which is fixedly connected to the two side bolster feet 22 respectively; the upper part of the two guide plates 44 away from the bolster feet 22 is fixedly connected by a cover plate 43; an inflatable rubber bladder 41 is provided at the lower part of the guide plate 44 away from the bolster feet 22; a water-stop strip 40 is provided between the inflatable rubber bladders 41.

[0110] After the bolster beam 20 is installed and fixed, waterproofing can be applied. The construction method for the waterproofing device is as follows:

[0111] The first step is to cut the 40mm waterstop strip to the length of the expansion joint;

[0112] The second step is to seal both ends of the inflatable rubber bladder 41.

[0113] The third step is to install valve cores on the sealing ports at both ends for inflation.

[0114] Step 4: Fix the C-shaped bolster beam 20; fix the bolster beam 20 with concrete.

[0115] Fifth step: Insert the inflatable rubber bladder 41 at one end of the waterstop 40 into the inflatable rubber bladder 41 at the other end, and inflate it.

[0116] The advantages of this waterproof device are that it is quick to install, the inflatable rubber bladder has an outer diameter of about 15mm and a wall thickness of about 4mm, it is not easy to leak air, and it can generally be inflated only once every 4-6 years, or even longer.

[0117] The working principle of this embodiment is basically the same as that of Embodiment 1, so it will not be described again here.

[0118] Example 3

[0119] This embodiment has a basically the same structure as Embodiment 1.

[0120] The difference is that, for example Figure 1 As shown, the toothed beam assembly also includes a spring plate 34 and a spring plate fixing shaft 35; both the first toothed beam 10 and the second toothed beam 10 are provided with spring plate fixing holes 16; there are two spring plate fixing holes 16, respectively located at both ends of the side of the first toothed beam 10 and the second toothed beam 10; the spring plate 34

[0121] There are two spring plate fixing shafts 35; each spring plate fixing shaft 35 is adapted to the spring plate fixing hole 16.

[0122] The two ends of the spring sheet 34 are respectively sleeved with the spring sheet fixing shaft 35.

[0123] The spring sheet 34 is set to prevent the height of adjacent tooth beams from being inconsistent after being connected by the slide bar 35. This can cause bumps for vehicles with small wheels. The spring sheet 34 fills the gap and prevents the vehicle from bumping. In addition, it also stabilizes the stop bar, as well as provide dust protection and noise reduction.

[0124] The working principle of this embodiment is basically the same as that of Embodiment 1, so it will not be described again here.

[0125] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent. Currently, the technical solution of this application has undergone pilot testing, i.e., small-scale experiments before large-scale mass production. After the pilot testing was completed, user surveys were conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations are underway for the formal production and industrialization of the product.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of the present invention can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge interlocking seismic expansion joint, characterized in that: The device includes an expansion joint base and a toothed beam assembly disposed within the expansion joint base; the expansion joint base includes a bolster beam (20) pre-embedded in the bridge concrete layer; there are two bolster beams (20); the bolster beams (20) are respectively disposed on both sides of the expansion joint; the toothed beam assembly is hinged to the bolster beams (20) on both sides; The bolster beam (20) includes a bolster beam body (21), a bolster beam foot (22), and a support shaft groove (23); the bolster beam body (21) is fixedly connected to the bolster beam foot (22); the bolster beam body (21) is provided with a support shaft groove (23); the support shaft groove (23) is C-shaped; the two C-shaped support shaft grooves (23) are arranged opposite to each other; The toothed beam assembly consists of a first toothed beam (10) and a second toothed beam; the first toothed beam (10) and the second toothed beam are staggered and opposite to each other along the bolster beam (20); The length of the first toothed beam (10) and the length of the second toothed beam are both greater than half the distance between the two bolster beams (20); One end of the first toothed beam (10) is hinged to the support shaft groove (23) of the pillow beam (21) on the same side; The other end of the first tooth beam (10) is slidably connected to the second tooth beam; The first tooth beam (10) has the same structure as the second tooth beam; One end of the second toothed beam is hinged to the support shaft groove (23) of the pillow beam (21) on the same side; The other end of the second toothed beam is slidably connected to the first toothed beam (10); The first toothed beam body (10) has a support shaft (12) hinged to the support shaft groove (23) at one end; the first toothed beam body (10) has an upper sliding support (13), a lower sliding load support (14) and a stop groove rod slide (15) at the other end. The first tooth beam body (10) has an I-shaped cross section, and the I-shaped cross section of the first tooth beam body (10) is provided with a groove (11) and a sliding surface (17). The lower sliding load support (14) of the second toothed beam overlaps in the groove (11) of the adjacent first toothed beam (10); the upper sliding support (13) of the second toothed beam abuts against the sliding surface (17) of the adjacent first toothed beam (10). The lower sliding load support (14) of the first toothed beam (10) overlaps in the groove (11) of the adjacent second toothed beam; the upper sliding support (13) of the first toothed beam (10) abuts against the sliding surface (17) of the adjacent second toothed beam. The support shaft (12) can be limited to rotate within the support shaft groove (23); The toothed beam assembly also includes a retaining rod (30) that is inserted into the retaining rod groove (15) of the first toothed beam (10); the retaining rod (30) includes a slide rod (33) and a second support shaft (31) provided at one end of the slide rod (33). The second support shaft (31) is fixedly connected to the slide rod (33) via a journal (32); There are two slide rods (33); they are respectively located on both sides of the journal (32); the slide rods (33) are movably inserted into the groove of the retaining rod (15); The second support shaft (31) is hinged to the support shaft groove (23).

2. The bridge interlocking seismic expansion joint according to claim 1, characterized in that: The second toothed beam is provided with a retaining rod (30).

3. The bridge interlocking seismic expansion joint according to claim 2, characterized in that: The toothed beam assembly also includes a spring plate (34) and a spring plate fixing shaft (35); both the first toothed beam (10) and the second toothed beam are provided with spring plate fixing holes (16). The spring plate fixing shaft (35) is installed in the spring plate fixing hole (16); The two ends of the spring sheet (34) are respectively sleeved with the spring sheet fixing shaft (35).

4. The bridge interlocking seismic expansion joint according to claim 1, characterized in that: It also includes a waterproof device installed on the pillow beam foot (22); the waterproof device includes a guide plate (44), a cover plate (43), an inflatable rubber bladder (41) and a waterstop (40). The guide plate (44) consists of two pieces, which are fixedly connected to the pillow beam feet (22) on both sides respectively; the upper part of the two guide plates (44) away from the pillow beam feet (22) is fixedly connected by a cover plate (43); the lower part of the guide plate (44) away from the pillow beam feet (22) is provided with an inflatable rubber bladder (41); a water-stop strip is provided between the inflatable rubber bladders (41).

Images