A bridge deck continuous reconstruction structure and construction method

Abstract

This invention belongs to the field of bridge structure technology, and particularly relates to a continuous bridge deck reconstruction structure and construction method. This invention provides a continuous bridge deck reconstruction structure, which, by setting supporting steel, central beam steel, composite rubber plate units, and paired bolt units on the gap support body, achieves the following: 1. The composite rubber plate unit can withstand lateral compressive deformation and has sufficient supporting strength, and it is bonded integrally with the asphalt layer, ensuring the stability, efficiency, and comfort of the continuous gap support structure; 2. The paired bolt units are U-shaped, with the lower middle part abutting against the central beam steel and the upper side bolted to the composite rubber plate unit, ensuring that the composite rubber plate unit is not easily lifted or displaced. Furthermore, this invention also provides a construction method for the above structure.

Description

Technical Field

[0001] This invention belongs to the field of bridge structure technology, and in particular relates to a bridge deck continuous reconstruction structure and construction method. Background Technology

[0002] Bridge expansion joints refer to the gaps reserved between multiple structural sections of a bridge. Because the dimensions of a bridge will change slightly due to thermal expansion and contraction, the expansion joints prevent the bridge from being deformed or cracked by the internal forces caused by temperature changes.

[0003] The most common bridge expansion joint device currently available mainly consists of a central steel beam and a joint cover plate. The former is fixedly installed in the bridge joint, while the latter presses against the two joint ends and the central steel beam, allowing vehicles to pass smoothly over the joint cover plate. Furthermore, the joint cover plate is not fixedly connected to the two joint ends, ensuring that no force is applied to the joint cover plate when the joint ends move closer or further away, allowing the multiple sections of the bridge structure to freely expand and contract.

[0004] Furthermore, more advanced bridge expansion joint devices will include a joint support body and a supporting steel section. The former includes structures such as steel fibers and steel mesh, which become stronger joint ends, while the latter is set on the former and, together with the central beam steel section, supports the joint cover plate.

[0005] On the other hand, there are two main directions for improving bridge expansion joint devices: structural reinforcement and bridge deck continuity. The concept of bridge deck continuity refers to the absence of gaps between the joint cover plate and the bridge surface, so that vehicles do not make impact noise when passing over them, which is very comfortable and important.

[0006] Chinese utility model patent with patent publication number CN216586151U and publication date of May 24, 2022 discloses a structure for an expansion joint of a highway bridge, including an L-shaped support plate installed at the expansion joint of the highway bridge base. Several L-shaped support plates are provided and symmetrically arranged along the centerline of the expansion joint. An arched support block is provided between two L-shaped support plates, and a first connecting pipe is fixed on the sidewalls of both sides of the arched support block.

[0007] The general structural principle of the expansion joint structure in this utility model patent is as follows: when the arched support block is subjected to the force of a vehicle and undergoes lateral displacement, the first connecting pipe slides inside the second support pipe, causing the telescopic spring to stretch or contract, thereby allowing the arched support block to slide a certain distance between the two L-shaped support plates. When the force of the vehicle disappears, the spring resets, causing the arched support block to return to its original position, thereby reducing the degree of damage to other components in the structure when the arched support block undergoes lateral displacement under the force of a vehicle.

[0008] However, when this structure is actually used at bridge expansion joints, it still has at least two shortcomings. In other words, these are the technical problems that this invention aims to solve.

[0009] First, there are large gaps and grooves between the pressure plate and the bridge surface, which will cause a strong impact when vehicles pass over it, which is detrimental to both the bridge and the vehicles.

[0010] Secondly, the pressure plate is simply placed on the elastic element, so the former is easily lifted, displaced, or lost, which is extremely dangerous.

[0011] Therefore, in summary, there is an urgent need for a "continuous" bridge expansion joint device that can be securely installed with the cover plate and integrated with the bridge surface. Summary of the Invention

[0012] This invention provides a bridge deck continuous reconstruction structure, which, through the installation of supporting steel, central beam steel, composite rubber plate units, and paired bolt units on the gap support body, achieves the following: 1. The composite rubber plate unit can withstand lateral compressive deformation while possessing sufficient supporting strength, and it is bonded integrally with the asphalt layer, ensuring the stability, efficiency, and comfort of the continuous gap support structure; 2. The paired bolt units are U-shaped, with the lower middle part abutting against the central beam steel and the upper side bolted to the composite rubber plate unit, ensuring that the composite rubber plate unit is not easily lifted or displaced. Furthermore, this invention also provides a construction method for the above structure.

[0013] The technical solution adopted by the present invention to solve the above problems is: a bridge deck continuous reconstruction structure, including a gap support body, and supporting steel and central beam steel set on the gap support body, and also including a composite rubber plate unit set on the upper surface of the two gap supports body and bonded to the asphalt layers at both ends, and a pair of bolt units set on the lower surface of the central beam steel and used to screw the composite rubber plate unit.

[0014] A further preferred technical solution is that: the composite rubber sheet unit includes a rubber sheet with an asphalt layer bonded to its end and the gap support bonded to its lower surface, a steel plate disposed inside the rubber sheet and used for screwing the paired bolt unit, and an outer hole disposed on the lower surface of the rubber sheet and used for inserting and installing the paired bolt unit.

[0015] A further preferred technical solution is that the composite rubber plate unit further includes a threaded hole disposed on the steel plate and used for screwing the paired bolt units.

[0016] A further preferred technical solution is that the composite rubber plate unit further includes an inner hole disposed on the steel plate and used to pass through the paired bolt unit, and a fixing nut disposed on the upper surface of the steel plate and used to screw the paired bolt unit.

[0017] A further preferred technical solution is that the paired bolt unit includes a rectangular plate disposed on the lower surface of the middle beam steel, two end holes respectively disposed at both ends of the rectangular plate, and bolts disposed on the end holes and screwed onto the steel plate at the upper end.

[0018] A further preferred technical solution is that the paired bolt unit further includes a fixing tube disposed on the upper surface of the rectangular plate and fitted with the bolt.

[0019] A further preferred technical solution is that: the lower surface of the central beam steel is provided with a positioning groove for engaging and fixing the rectangular plate.

[0020] A further preferred technical solution is that the paired bolt unit further includes a radial extension plate disposed on the fixed pipe, and an arc-shaped elastic plate disposed on the radial extension plate and used to engage the side groove of the supporting steel or the middle beam steel.

[0021] A further preferred technical solution is that the paired bolt unit further includes an annular groove disposed on the outer ring surface of the fixed tube, and an anti-drop ring fitted on the annular groove for mounting the two radial extension plates.

[0022] A construction method for a bridge deck continuous reconstruction structure includes the following steps:

[0023] S1. One side of the composite rubber sheet unit is first bonded to the upper surface of one of the slot supports;

[0024] S2. The paired bolt units are fixed on the lower surface of the middle beam steel in the manner of first aligning the long side with the transverse direction of the bridge, then inserting them downwards, and finally rotating them 90° to align with the longitudinal direction of the bridge.

[0025] S3. Tighten the paired bolt unit upwards until the slot support is pressed against the central beam steel;

[0026] S4. Adhere the lower surface of the remaining side of the composite rubber plate unit, and fill the gaps between the two ends of the composite rubber plate unit and the asphalt layer. Finally, the construction of the entire bridge deck continuous reconstruction structure is completed. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of one type of bridge expansion joint device in the prior art.

[0029] Figure 3 This is a schematic diagram of the composite rubber sheet unit in this invention.

[0030] Figure 4 This is a schematic diagram of the positional structure of the paired bolt unit in this invention.

[0031] Figure 5 This is a top-down view showing the distribution of the paired bolt units in this invention.

[0032] Figure 6 This is a schematic diagram of the position and structure of the arc-shaped elastic plate in this invention.

[0033] Figure 7 This is a schematic diagram of the position structure of the anti-drop ring in this invention.

[0034] Figure 8 This is a schematic diagram of the position structure of the fixed tube in this invention.

[0035] In the attached diagram, the meanings of each number are as follows:

[0036] a) Asphalt layer, b) Ultra-thin overlay layer, c) Central beam support plate, d) Joint cover plate, e) Transverse bridge direction;

[0037] 1. Gap support structure; 2. Support steel; 3. Central beam steel; 4. Composite rubber sheet unit; 5. Paired bolt unit; 6. Positioning groove;

[0038] Rubber plate 401, steel plate 402, outer hole 403, threaded hole 404, inner hole 405, fixing nut 406, rectangular plate 501, end hole 502, bolt 503, fixing tube 504, radial extension plate 505, arc-shaped elastic plate 506, annular groove 507, anti-drop ring 508. Detailed Implementation

[0039] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0040] As attached Figure 1-8 As shown, a bridge deck continuous reconstruction structure includes a gap support 1, a supporting steel 2 and a central beam steel 3 disposed on the gap support 1, a composite rubber plate unit 4 disposed on the upper surfaces of the two gap supports 1 and bonded to the asphalt layers a at both ends, and a pair of bolt units 5 disposed on the lower surface of the central beam steel 3 and used to screw the composite rubber plate unit 4.

[0041] In the existing technology, asphalt layer a can be used alone or in combination with ultra-thin overlay layer b. The latter is essentially a special, more wear-resistant reinforced asphalt. The central beam support plate c is one of the ways in which the central beam steel 3 can be fixedly installed. A set of plates is set on the left and right sides at the gap and is staggered to ensure that the central beam support plates c will not press against each other when the bridge expands and contracts.

[0042] Furthermore, the length direction of the supporting steel 2 and the middle beam steel 3 is transverse to the bridge direction e. The gap cover plate d itself is a whole steel plate. Therefore, it cannot be laterally fitted or bonded to the bridge surface layer. Otherwise, once the bridge gap shrinks, the gap cover plate d will directly push up, damage, and crush the asphalt material of the bridge surface layer. Therefore, gaps can only be reserved on both sides of the gap cover plate d, which does not conform to the concept of "continuous bridge deck".

[0043] In this embodiment, the composite rubber sheet unit 4 is bonded downward to the gap support 1, and the two ends are bonded to the asphalt layer a or the ultra-thin overlay layer b. Because its own material includes relatively soft rubber, even if the bridge gap expands or shrinks, the rubber material itself can "absorb" this deformation and will not squeeze the asphalt in the end. This is the basic requirement for bridge deck continuity, that is, when viewed from above, the gaps in the bridge are not visible.

[0044] Finally, the paired bolt unit 5 is U-shaped, and several of them are evenly spaced along the transverse direction on the central beam steel 3. The lower middle part of the U-shaped structure abuts against the central beam steel 3, and the upper side is screwed to the composite rubber plate unit 4, ensuring that the composite rubber plate unit 4 is not easily lifted or displaced.

[0045] The composite rubber sheet unit 4 includes a rubber sheet 401 with an asphalt layer a bonded to its end and the gap support 1 bonded to its lower surface, a steel plate 402 disposed within the rubber sheet 401 and used for screwing the paired bolt unit 5, and an outer hole 403 disposed on the lower surface of the rubber sheet 401 and used for inserting and installing the paired bolt unit 5.

[0046] In this embodiment, the steel plate 402 is smaller than the rubber plate 401 in the longitudinal direction of the bridge, meaning that the steel plate 402 does not contact the asphalt layer. Therefore, the rubber plate 401 can "absorb" the deformation at the bridge gaps, preventing it from squeezing and breaking the asphalt layer.

[0047] In addition, the steel plate 402 ensures basic support strength, and together with the central beam steel 3, it ensures that vehicles can pass normally in the gaps of the bridge and that the entire composite rubber plate unit 4 will not collapse downward.

[0048] The composite rubber plate unit 4 also includes a threaded hole 404 disposed on the steel plate 402 and used for screwing the paired bolt unit 5.

[0049] In this embodiment, there are two specific screwing methods for the composite rubber plate unit 4. One is that the outer hole 403 is matched with the threaded hole 404, and the paired bolt unit 5 passes through the outer hole 403 and is directly screwed into the threaded hole 404. The advantage of this method is that it is suitable for the composite rubber plate unit 4 with a small thickness. The disadvantage is that the force at the threaded hole 404 is too concentrated, and the opening is prone to bending and deformation downward.

[0050] The composite rubber plate unit 4 further includes an inner hole 405 disposed on the steel plate 402 and used to pass through the paired bolt unit 5, and a fixing nut 406 disposed on the upper surface of the steel plate 402 and used to screw the paired bolt unit 5.

[0051] In this embodiment, the combination of the outer hole 403, the inner hole 405 and the fixing nut 406 is the second specific screw connection method of the composite rubber plate unit 4. In this case, the inner hole 405 is not threaded, the fixing nut 406 is welded to the upper surface of the steel plate 402, and the opening positions of the three are all aligned.

[0052] The advantages and disadvantages of this method are exactly the opposite of the first method mentioned above. That is, it is suitable for thicker composite rubber plate units 4. If they are thinner, the rubber plate is easily crushed at the fixing nut 406, which is a disadvantage. The advantage is that the downward force applied on the paired bolt units 5 is distributed on the lower surface of the fixing nut 406, resulting in a larger area and lower pressure, making the steel plate 402 less prone to deformation and bending.

[0053] The two methods mentioned above can be chosen either way, or even used in combination. One of the important criteria for selection is the overall thickness of the side on which the paired bolt units 5 are installed on the composite rubber plate unit 4.

[0054] The paired bolt unit 5 includes a rectangular plate 501 disposed on the lower surface of the middle beam steel 3, two end holes 502 respectively disposed at both ends of the rectangular plate 501, and bolts 503 disposed on the end holes 502 and screwed onto the steel plate 402 at the upper end.

[0055] In this embodiment, there are two bolts 503, located on both sides of the middle beam steel 3, and the end hole 502 is a simple circular hole without threads.

[0056] The paired bolt unit 5 also includes a fixing tube 504 disposed on the upper surface of the rectangular plate 501 and fitted with the bolt 503.

[0057] In this embodiment, the fixing tube 504 is a simple circular tube without internal threads. After aligning with the end hole 502, it is welded to the upper surface of the rectangular plate 501.

[0058] The function of the fixing tube 504 is as follows: First, when the end of the rectangular plate 501 bends slightly upward, the fixing tube 504 can laterally hold the bolt 503 through the rigidity of its own structure, thereby preventing the above deformation from expanding further; Second, without the fixing tube 504, the vehicle vibration transmitted from the composite rubber plate unit 4 would be entirely applied to the end hole 502, at which point the end hole 502 would quickly deform and break. Therefore, the fixing tube 504 can share the above vibration.

[0059] The lower surface of the central beam steel 3 is provided with a positioning groove 6 for engaging and fixing the rectangular plate 501.

[0060] In this embodiment, the positioning groove 6 is aligned with the outer hole 403 in the transverse direction. In other words, as long as the rectangular plate 501 is inserted into the positioning groove 6, the bolt 503 will be screwed upwards and will be aligned with the outer hole 403, ensuring that the tightening action of the paired bolt unit 5 is more convenient and efficient.

[0061] Therefore, the width of the positioning groove 6 is equal to the width of the rectangular plate 501.

[0062] The paired bolt unit 5 also includes a radial extension plate 505 disposed on the fixed tube 504, and an arc-shaped elastic plate 506 disposed on the radial extension plate 505 and used to engage the side groove of the support steel 2 or the middle beam steel 3.

[0063] In the prior art, the shape or structure of the supporting steel 2 and the central beam steel 3 are both I-beams, or similar variations of I-beams. Therefore, the former has lateral openings on its outer side and the latter has lateral openings on both sides.

[0064] In this embodiment, the arc-shaped elastic plate 506 is made of elastic steel. After it is inserted into the lateral opening and combined with the radial extension plate 505, it has at least the following two functions.

[0065] First, before the bolt 503 is tightened, the rectangular plate 501 does not need to be held up by hand, as it can be pre-suspended and fixed. Of course, at this time, the rectangular plate 501 is already against the lower surface of the central beam steel 3.

[0066] Secondly, after the entire modified structure has been used for a period of time, the bolt 503 may loosen and fall off. At this time, the rectangular plate 501, relying on the arc-shaped elastic plate 506 and the radial extension plate 505, will still be stuck on the supporting steel 2 and the central beam steel 3, thus making the rectangular plate 501 and the fixing pipe 504 part less likely to be lost.

[0067] The paired bolt unit 5 also includes an annular groove 507 disposed on the outer ring surface of the fixing tube 504, and an anti-drop ring 508 fitted on the annular groove 507 and used to install the two radial extension plates 505.

[0068] In this embodiment, the anti-drop ring 508, the arc-shaped elastic plate 506, and the radial extension plate 505 are a complete part. After the anti-drop ring 508 is combined with the annular groove 507, the part has the following advantages.

[0069] First, when the paired bolt unit 5 is pre-suspended and fixed, the arc-shaped elastic plate 506 can rotate into the lateral opening of the supporting steel 2 and the central beam steel 3, instead of forcibly squeezing upwards, which is very labor-saving and safe.

[0070] In other words, before the paired bolt unit 5 is pre-suspended and fixed, the length direction of the anti-drop ring 508, the arc-shaped elastic plate 506 and the radial extension plate 505 is transverse. Then, after rotating 90°, the arc-shaped elastic plate 506 smoothly enters the above-mentioned lateral opening.

[0071] Secondly, if the fixing tube 504 is relatively long, the overall shape of the anti-drop ring 508, the arc-shaped elastic plate 506, and the radial extension plate 505 is more approximately straight; conversely, if the fixing tube 504 is relatively short, the overall shape is more approximately "V-shaped". In other words, the "pre-suspension fixing parts" composed of the above three components have a wide range of applications.

[0072] Finally, the shape of the arc-shaped elastic plate 506 is an open circular ring, or it can be an open square ring, an open triangular ring, or an open irregular ring, as long as it can be fully and appropriately locked in place within the aforementioned lateral opening.

[0073] A construction method for a bridge deck continuous reconstruction structure includes the following steps:

[0074] S1. One side of the composite rubber sheet unit 4 is first bonded to the upper surface of one of the slot support bodies 1.

[0075] S2. The paired bolt unit 5 is fixed on the lower surface of the middle beam steel 3 by first aligning its long side parallel to the transverse direction of the bridge, then inserting it downwards, and finally rotating it 90° to be parallel to the longitudinal direction of the bridge.

[0076] S3. Tighten the paired bolt unit 5 upwards until the slot support 1 presses against the central beam steel 3;

[0077] S4. Adhere the lower surface of the remaining side of the composite rubber plate unit 4, and fill the gaps between the two ends of the composite rubber plate unit 4 and the asphalt layer a. Finally, the construction of the entire bridge deck continuous reconstruction structure is completed.

[0078] In S1, the bonding operation uses existing asphalt concrete, while in S2, the length of the paired bolt unit 5 is greater than the gap width between the gap support 1 and the central beam 3. Therefore, the paired bolt unit 5 must be lowered first and then rotated to finally come onto the lower surface of the central beam 3.

[0079] In addition, in S4, the remaining side of the composite rubber plate unit 4 is also bonded with asphalt concrete, and the supplementary materials at both ends are determined according to the material of the bridge surface, namely, ordinary asphalt for asphalt layer a, or reinforced asphalt for ultra-thin overlay layer b.

[0080] Finally, the advantages of the bridge deck continuous modification structure in this embodiment are summarized as follows.

[0081] First, the composite rubber plate unit 4 is composed of both steel plates and rubber plates. The former ensures sufficient support strength, while the latter ensures sufficient lateral deformation absorption. Ultimately, this allows vehicles to pass normally through the gaps in the bridge, while ensuring that there are no gaps on the upper surface and that vehicles do not make impact noise when passing through. This is also the basic effect of the continuous bridge deck concept.

[0082] Second, the composite rubber plate unit 4 relies on multiple paired bolt units 5 to hold and pull the central beam steel 3, making it difficult for the composite rubber plate unit 4 to be lifted or moved.

[0083] Third, the composite rubber sheet unit 4, whether thick or thin, can be fully and appropriately bolted to the paired bolt unit 5.

[0084] Fourth, the paired bolt unit 5 itself has the advantages of high structural strength and is not easily stretched to the point of deformation.

[0085] Fifth, relying on the positioning groove 6, the paired bolt unit 5 has a precise pre-positioning function on the central beam steel 3, ensuring that the bolt 503 can be installed quickly afterwards.

[0086] Sixth, the paired bolt unit 5 has the function of pre-suspending and fixing on the supporting steel 2 and the central beam steel 3, so that when the bolt 503 is tightened, the paired bolt unit 5 does not need to be constantly supported and fixed.

[0087] Seventh, the paired bolt unit 5 on the supporting steel 2 and the central beam steel 3 has an anti-falling function. Even if all the bolts 503 fall off, the rectangular plate 501 and the fixing pipe 504 as a whole are not easy to fall off.

[0088] Eighth, the above-mentioned pre-suspended fixing and anti-falling operation is relatively simple and convenient. It only requires screwing the arc-shaped elastic plate 506 into the lateral opening of the supporting steel 2 or the central beam steel 3.

[0089] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A bridge deck continuous reconstruction structure, comprising a gap support (1), and supporting steel (2) and a central beam steel (3) disposed on the gap support (1), characterized in that: It also includes a composite rubber plate unit (4) disposed on the upper surface of the two gap supports (1) and bonded to the asphalt layers (a) at both ends, and a pair of bolt units (5) disposed on the lower surface of the central beam steel (3) and used to screw the composite rubber plate unit (4). The composite rubber sheet unit (4) includes a rubber sheet (401) with an asphalt layer (a) bonded to its end and the gap support (1) bonded to its lower surface, a steel plate (402) disposed within the rubber sheet (401) and used for screwing the paired bolt unit (5), and an outer hole (403) disposed on the lower surface of the rubber sheet (401) and used for inserting and installing the paired bolt unit (5). The paired bolt unit (5) includes a rectangular plate (501) disposed on the lower surface of the middle beam steel (3), two end holes (502) respectively disposed at both ends of the rectangular plate (501), and bolts (503) disposed on the end holes (502) and screwed onto the steel plate (402) at the upper end. The paired bolt unit (5) also includes a fixing tube (504) disposed on the upper surface of the rectangular plate (501) and fitted with the bolt (503). The paired bolt unit (5) also includes a radial extension plate (505) disposed on the fixed tube (504) and an arc-shaped elastic plate (506) disposed on the radial extension plate (505) and used to engage the side groove of the support steel (2) or the middle beam steel (3).

2. The bridge deck continuity modification structure according to claim 1, characterized in that: The composite rubber plate unit (4) also includes a threaded hole (404) disposed on the steel plate (402) and used for screwing the paired bolt unit (5).

3. The bridge deck continuity modification structure according to claim 1, characterized in that: The composite rubber plate unit (4) further includes an inner hole (405) disposed on the steel plate (402) and used to pass through the paired bolt unit (5), and a fixing nut (406) disposed on the upper surface of the steel plate (402) and used to screw the paired bolt unit (5).

4. The bridge deck continuity modification structure according to claim 1, characterized in that: The lower surface of the middle beam steel (3) is provided with a positioning groove (6) for engaging and fixing the rectangular plate (501).

5. The bridge deck continuity modification structure according to claim 1, characterized in that: The paired bolt unit (5) further includes an annular groove (507) disposed on the outer ring surface of the fixed tube (504), and a non-dropping ring (508) fitted on the annular groove (507) for mounting the two radial extension plates (505).

6. A construction method for a bridge deck continuous reconstruction structure as described in claim 1, characterized in that... The steps are as follows: S1. One side of the composite rubber sheet unit (4) is first bonded to the upper surface of one of the slot supports (1); S2. The paired bolt unit (5) is fixed on the lower surface of the middle beam steel (3) by first aligning the long side with the transverse direction of the bridge, then inserting it downwards, and finally rotating it 90° to align with the longitudinal direction of the bridge. S3. Tighten the paired bolt unit (5) upwards until the slot support (1) presses against the central beam steel (3); S4. Adhere the lower surface of the remaining side of the composite rubber plate unit (4) and fill the gap between the two ends of the composite rubber plate unit (4) and the asphalt layer (a). Finally, the construction of the entire bridge deck continuous reconstruction structure is completed.

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