A new type of seamless bridge deck connector plate with vertical tie rods
By introducing a new type of seamless bridge deck connection plate with vertical tie rods and anchor rods in the bridge deck connection plate, the problems of insufficient expansion and contraction capacity and vertical bearing capacity of traditional seamless expansion joints have been solved, thereby improving the stability and integrity of the bridge, extending the service life of the bridge and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUZHOU PLANNING DESIGN & RES INST
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional seamless expansion joints have limited expansion and contraction capacity and insufficient vertical load-bearing capacity. They are also prone to cracking of the elastomer and cannot effectively absorb the expansion and contraction deformation of the main beam, resulting in a shortened service life of the bridge and increased maintenance costs.
A new type of seamless bridge deck connection plate with vertical tie rods is adopted, including an upper polyurethane pavement layer and a semi-continuous UHPC bridge deck connection plate. The UHPC connection plate is connected by corrugated steel bars. The T-shaped expansion joints are filled with compressible silicone rubber. Vertical tie rods are installed in the reserved grooves and welded to the main beam. Anchor rods are connected to the upper polyurethane pavement layer to form a continuous stress path.
It improves the negative bending moment deformation resistance of the bridge deck connecting plate, enhances the integrity of the connecting plate and the main beam, prevents the connecting plate from separating from the main beam, extends the service life of the bridge, and reduces maintenance costs.
Smart Images
Figure CN224468228U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge connecting plate technology, specifically a novel seamless bridge deck connecting plate with vertical tie rods. Background Technology
[0002] Bridges experience horizontal expansion and contraction, as well as bending deformation, due to temperature changes and the deflection of the main girder. Traditional jointed bridges typically incorporate expansion joints at locations such as abutments, piers, and between the main girder to absorb this horizontal deformation, and install expansion joint devices within these joints to ensure smooth and rapid vehicle movement. The design philosophy of bridge expansion joint devices is to accommodate the temperature-induced expansion and contraction of the main girder, preventing this deformation from being constrained and generating excessive internal forces within the main girder. The increasing traffic volume has led to severe problems with bridge expansion joints, significantly impacting bridge lifespan and drastically increasing maintenance workload and costs. Traditional expansion joints suffer from issues such as steel beam fracture, joint blockage, rubber breakage, aging, detachment, or jumping out, easy cracking and breakage of the concrete in the anchorage zone, high installation requirements, and a tendency for vehicles to bounce.
[0003] However, the existing seamless expansion joint is a design based on "deformation" (performance) and absorbs the expansion and contraction deformation of the main beam through the elastic expansion body. Its defects are small expansion deformation capacity, insufficient vertical bearing capacity, and no ability to cross the end joint. It needs to be supported by the bottom steel plate, but the bending of the steel plate itself and the stress concentration at the end of the steel plate can easily cause the elastic body to crack. Utility Model Content
[0004] The purpose of this invention is to provide a novel seamless bridge deck connecting plate with vertical tie rods to solve the above-mentioned technical problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel seamless bridge deck connection plate with vertical tie rods, comprising an upper polyurethane pavement layer as the upper structure and a semi-continuous UHPC bridge deck connection plate as the lower structure. The semi-continuous UHPC bridge deck connection plate is composed of multiple UHPC connection plate bodies, which are connected by corrugated steel bars. The corrugated steel bars are wrapped with an unbonded layer. The upper surface of each UHPC connection plate body is provided with a T-shaped expansion joint, and the T-ribs of the T-shaped expansion joint are filled with compressible silicone rubber. The lower surface of each UHPC connection plate body is provided with a reserved groove, in which a vertical tie rod is installed. The lower end of the vertical tie rod is welded and fixed to the main beam, and the upper end of the vertical tie rod is connected to the upper polyurethane pavement layer through an anchor rod.
[0006] Preferably, the polyurethane paving layer has a thickness of 8-12 cm, and the UHPC connecting plate is made of M25 high-strength UHPC material with a thickness of 15-20 cm.
[0007] Preferably, the T-shaped expansion joint has a width of 2-3 cm and a depth of 5-8 cm; the reserved groove has a width of 10-15 cm and a depth of 8-12 cm, and the reserved groove is located 20-30 cm away from the end of the UHPC connecting plate.
[0008] Preferably, the adhesive-free layer is made of polyethylene and has a thickness of 2-3 mm. The compressible silicone rubber has a porosity of 30-40%.
[0009] Preferably, the vertical tie rod is made of high-strength alloy steel.
[0010] Preferably, the vertical tie rod has a diameter of 25-30 mm and its surface is coated with an anti-corrosion coating to enhance its durability and corrosion resistance. The anchor rod is made of stainless steel.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. It effectively improves the ability of the connecting plate to resist negative bending moment deformation, avoids the arching phenomenon of the connecting plate due to negative bending moment, and meets the normal use requirements of the continuous bridge deck structure.
[0013] 2. Improve the integrity of the connecting plate and the main beam. The tie rod forms a vertical constraint in the bridge deck connecting plate, which plays the same role as the post-cast sections at both ends of the connecting plate. It can effectively improve the integrity between the connecting plate and the main beam and prevent the connecting plate from separating from the main beam. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is an overall schematic diagram of a novel seamless bridge deck connecting plate with vertical tie rods according to this embodiment;
[0016] Figure 2 This is a schematic diagram of the corrugated steel bar in this embodiment;
[0017] Figure 3 This is a schematic diagram of the T-shaped expansion joint in this embodiment.
[0018] The attached diagram lists the components represented by each number as follows:
[0019] 1. Polyurethane pavement layer; 2. Semi-continuous UHPC bridge deck connection plate; 3. UHPC connection plate body; 4. Corrugated steel bars; 5. Unbonded layer; 6. T-shaped expansion joint; 7. Compressible silicone rubber; 8. Reserved groove; 9. Vertical tie rod; 10. Main beam; 11. Anchor bolt. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-3 This utility model provides a technical solution: a novel seamless bridge deck connecting plate with vertical tie rods, comprising an upper polyurethane pavement layer 1 as the upper structure and a semi-continuous UHPC bridge deck connecting plate 2 as the lower structure. The semi-continuous UHPC bridge deck connecting plate 2 is composed of multiple UHPC connecting plate bodies 3, which are connected by corrugated steel bars 4. The corrugated steel bars 4 are wrapped with an unbonded layer 5. The upper surface of the UHPC connecting plate body 3 is provided with a T-shaped expansion joint 6, and the T-ribs of the T-shaped expansion joint 6 are filled with compressible silicone rubber 7. The lower surface of the UHPC connecting plate body 3 is provided with a reserved groove 8, and a vertical tie rod 9 is provided in the reserved groove 8. The lower end of the vertical tie rod 9 is welded and fixed to the main beam 10, and the upper end of the vertical tie rod 9 is connected to the upper polyurethane pavement layer 1 through an anchor rod 11.
[0022] Specifically, the polyurethane pavement layer 1 is 8-12 cm thick, and the UHPC connecting plate 3 is made of M25 high-strength UHPC material with a thickness of 15-20 cm. M25 high-strength UHPC material has excellent compressive strength and flexural strength, can withstand heavy loads on the bridge deck, and also has good durability and freeze-thaw resistance.
[0023] Specifically, the T-shaped expansion joint is 2-3 cm wide and 5-8 cm deep; the reserved groove 8 is 10-15 cm wide and 8-12 cm deep, and the reserved groove 8 is located 20-30 cm away from the end of the UHPC connecting plate. The design of the T-shaped expansion joint 6 can effectively absorb the thermal expansion and contraction of the bridge deck connecting plate when the temperature changes, preventing the bridge deck from cracking. The design of the reserved groove 8 allows the vertical tie rod 9 to be firmly installed in the UHPC connecting plate 3, ensuring the stability of the entire structure.
[0024] Specifically, the non-adhesive layer 5 is made of polyethylene with a thickness of 2.5 mm. Polyethylene has good flexibility and weather resistance, effectively preventing direct contact between the corrugated steel reinforcement 4 and the UHPC material, thus reducing stress concentration. The compressible silicone rubber 7 has a porosity of 35%, which gives it good elasticity and compressibility, enabling it to adapt to the deformation requirements of the bridge deck connection plate under different temperature and load conditions.
[0025] Specifically, the vertical tie rod 9 is made of high-strength alloy steel with a diameter of 28 mm and has an anti-corrosion coating to enhance its durability and corrosion resistance. High-strength alloy steel possesses excellent tensile strength and fatigue resistance, enabling it to withstand dynamic loads on the bridge deck. The anti-corrosion coating is made of epoxy resin with a thickness of 0.5 mm, effectively preventing corrosion of the vertical tie rod 9 in humid environments. The anchor rod 11 is made of stainless steel with a diameter of 20 mm and a length of 150 mm, ensuring a secure and reliable connection between the vertical tie rod 9 and the upper polyurethane pavement layer 1.
[0026] A specific application example of this embodiment is as follows:
[0027] In use, the upper polyurethane pavement layer 1 serves as the driving layer of the bridge deck, possessing excellent waterproof and wear-resistant properties, capable of withstanding the wear and tear caused by vehicle traffic. The semi-continuous UHPC bridge deck connecting plate 2 serves as the structural layer, bearing the main load transfer function. Multiple UHPC connecting plate bodies 3 are connected by corrugated steel bars 4 to form an integral structure. The unbonded layer 5 wrapped around the corrugated steel bars 4 allows for a certain degree of relative displacement between the UHPC connecting plate bodies 3, reducing stress concentration caused by temperature changes.
[0028] The compressible silicone rubber 7 filling the T-shaped expansion joint 6 on the upper surface of the UHPC connecting plate 3 absorbs the thermal expansion and contraction of the bridge deck connecting plate during temperature changes, preventing bridge deck cracking. Vertical tie rods 9 installed in the pre-reserved groove 8 on the lower surface of the UHPC connecting plate 3 firmly connect the bridge deck connecting plate to the main beam 10, enhancing the overall integrity and stability of the bridge deck structure. The upper end of the vertical tie rod 9 is connected to the upper polyurethane pavement layer 1 via anchor rods 11, forming a continuous force path from the upper polyurethane pavement layer 1 to the main beam 10, improving the seismic and impact resistance of the bridge deck structure.
[0029] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A novel seamless bridge deck connecting plate with vertical tie rods, characterized in that: The upper structure includes an upper polyurethane pavement layer (1) and a semi-continuous UHPC bridge deck connecting plate (2) as the lower structure. The semi-continuous UHPC bridge deck connecting plate (2) is composed of multiple UHPC connecting plate bodies (3). Each UHPC connecting plate body (3) is connected by corrugated steel bars (4). The corrugated steel bars (4) are wrapped with an unbonded layer (5). The upper surface of the UHPC connecting plate body (3) is provided with a T-shaped expansion joint (6). The T-rib of the T-shaped expansion joint (6) is filled with compressible silicone rubber (7). The lower surface of the UHPC connecting plate body (3) is provided with a reserved groove (8). A vertical tie rod (9) is provided in the reserved groove (8). The lower end of the vertical tie rod (9) is welded and fixed to the main beam (10). The upper end of the vertical tie rod (9) is connected to the upper polyurethane pavement layer (1) through an anchor rod (11).
2. A novel seamless bridge deck connecting plate with vertical tie rods according to claim 1, characterized in that: The polyurethane paving layer (1) has a thickness of 8-12 cm, and the UHPC connecting plate (3) is made of M25 high-strength UHPC material with a thickness of 15-20 cm.
3. A novel seamless bridge deck connecting plate with vertical tie rods according to claim 1, characterized in that: The T-shaped expansion joint has a width of 2-3 cm and a depth of 5-8 cm; the reserved groove (8) has a width of 10-15 cm and a depth of 8-12 cm, and the reserved groove (8) is located 20-30 cm away from the end of the UHPC connecting plate.
4. A novel seamless bridge deck connecting plate with vertical tie rods according to claim 1, characterized in that: The non-adhesive layer (5) is made of polyethylene material with a thickness of 2-3 mm, and the compressible silicone rubber (7) has a porosity of 30-40%.
5. A novel seamless bridge deck connecting plate with vertical tie rods according to claim 1, characterized in that: The vertical tie rod (9) is made of high-strength alloy steel.
6. A novel seamless bridge deck connecting plate with vertical tie rods according to claim 1, characterized in that: The vertical tie rod (9) has a diameter of 25-30 mm and its surface is coated with an anti-corrosion coating to enhance its durability and corrosion resistance. The anchor rod (11) is made of stainless steel.