Fabricated elastomer seamless expansion joint structure

Abstract

The invention discloses an assembly type elastic body seamless expansion joint structure, and relates to the technical field of bridge expansion joints, the assembly type elastic body seamless expansion joint structure comprises a bridge beam body, two groups of symmetrical joint crossing expansion components and beam body notch embedded steel bars, through the synergistic effect of the beam body notch embedded steel bars, rapid anchoring embedded parts, connecting steel bars and the like, the load is effectively transmitted, and the expansion joint structure is more stable and reliable. The expansion joint is tightly combined with the bridge body to form a stable stress system; the notch anchoring concrete firmly anchors and protects the rapid anchoring embedded part, the structural durability is improved, displacement and looseness of the embedded part are avoided, the longitudinal drainage groove of the top surface protection layer of the cross-joint telescopic component is combined with the drainage guide plate, accumulated water on the bridge floor can be rapidly guided to flow into a drainage system, accumulated water is prevented from being accumulated at the expansion joint, and the service life is prolonged. The corrosion of water to the expansion joint structure is effectively reduced, the risk of structural damage caused by water accumulation is reduced, the durability of the expansion joint is improved, the driving safety is guaranteed, and the accident potential such as vehicle slipping caused by water accumulation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion joints, and specifically to an assembled elastomeric seamless expansion joint structure. Background Technique

[0002] As an important transportation infrastructure, the reliability and safety of bridges are crucial for traffic safety. During the operation period of bridges, under the actions of temperature changes, creep and shrinkage of beam bodies, and loads, etc., the beam ends will undergo telescopic deformations. To ensure the smoothness of the bridge deck and driving comfort, expansion joints that can adapt to the deformations of the beam ends need to be set at the beam ends of bridges.

[0003] Currently, under the repeated action of long-term vehicle loads, the connection parts between the cross-gap telescopic components and the beam body of traditional assembled seamless expansion joints are prone to fatigue damage due to frequent relative movements, resulting in structural loosening, reduced compressive capacity, and shortened service life. Moreover, when concentrated loads of large-tonnage vehicles act, the original structure cannot effectively disperse stress, causing local stress concentration, accelerating component damage, and it is difficult to ensure the long-term stable operation of the bridge. At the same time, the existing expansion joints lack effective hydrophobic designs, and rainwater and accumulated water on the bridge deck are likely to accumulate at the expansion joints. The accumulated water will not only corrode the metal components of the expansion joints, reducing their durability, but also form a water film when vehicles pass through, affecting the friction between the wheels and the road surface, increasing potential traffic safety hazards. Especially in rainy or cold weather, the harm is greater after the accumulated water freezes. Therefore, it is necessary to propose an assembled elastomeric seamless expansion joint structure. Summary of the Invention

[0004] The purpose of the present invention is to provide an assembled elastomeric seamless expansion joint structure to solve the problems proposed in the above background technique, that is, under the repeated action of long-term vehicle loads, the connection parts between the cross-gap telescopic components and the beam body of traditional assembled seamless expansion joints are prone to fatigue damage due to frequent relative movements, resulting in structural loosening, reduced compressive capacity, and shortened service life. Moreover, when concentrated loads of large-tonnage vehicles act, the original structure cannot effectively disperse stress, causing local stress concentration, accelerating component damage, and it is difficult to ensure the long-term stable operation of the bridge. At the same time, the existing expansion joints lack effective hydrophobic designs, and rainwater and accumulated water on the bridge deck are likely to accumulate at the expansion joints. The accumulated water will not only corrode the metal components of the expansion joints, reducing their durability, but also form a water film when vehicles pass through, affecting the friction between the wheels and the road surface, increasing potential traffic safety hazards. Especially in rainy or cold weather, the harm is greater after the accumulated water freezes.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An assembled elastomeric seamless expansion joint structure includes a bridge beam body, two groups of symmetric cross-gap telescopic components, and embedded steel bars in the beam body slots. The cross-seam expansion member has a top protective layer, and a plurality of longitudinal hydrophobic grooves are formed on the surface of the top protective layer. The depth of the plurality of longitudinal hydrophobic grooves is set to 5-10 mm, the width is 20-30 mm, and they are evenly distributed along the length direction of the expansion joint opened at the beam end of the bridge beam body.

[0006] Preferably, a quick-anchoring embedded part is connected to the side end of the embedded steel bar in the beam body notch, and notch anchoring concrete is arranged inside the embedded steel bar in the beam body notch, which is used for anchoring and protecting the quick-anchoring embedded part.

[0007] Preferably, a buffer layer is arranged between the cross-seam expansion member and the notch anchoring concrete, and connecting steel bars are connected between the quick-anchoring embedded part and the embedded steel bar in the beam body notch.

[0008] Preferably, a sealing layer is laid on the side of the cross-seam expansion member, and a bridge paving layer is laid on the side end of the sealing layer.

[0009] Preferably, the quick-anchoring embedded part is composed of a sealing end angle steel, an anchoring section steel and a connecting steel plate.

[0010] Preferably, the sealing end angle steel is used to protect the notch anchoring concrete, and the connecting steel plate is used to fix the sealing end angle steel and the anchoring section steel to form an integral body.

[0011] Preferably, the cross-seam expansion member includes an outer elastic body and an inner steel skeleton, and the inner steel skeleton is composed of a corrugated expansion plate, an anchoring ear plate, a cross-seam steel plate and a pre-tensioning base.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the synergistic action of pre-buried steel bars, quick-anchoring embedded parts and connecting steel bars in the beam groove, the load is effectively transmitted, enabling the expansion joint to be tightly combined with the bridge beam to form a stable stress system; the groove-anchoring concrete firmly anchors and protects the quick-anchoring embedded parts, improving the structural durability and preventing the displacement and loosening of the embedded parts. The longitudinal hydrophobic grooves opened on the top protection layer of the cross-seam expansion member, in cooperation with a slope of 1%-2%, can quickly guide the bridge surface water flow. The hydrophobic diversion plates on both sides further guide the accumulated water to the bridge drainage system, preventing the accumulation of water at the expansion joint, effectively reducing the erosion of water on the expansion joint structure, reducing the risk of structural damage caused by water accumulation, improving the durability of the expansion joint, ensuring driving safety, and reducing potential accidents such as vehicle skidding caused by water accumulation. Among them, the dynamic parameter design of the corrugated expansion plate precisely matches the expansion displacement requirements, cooperates with the outer elastic body to jointly bear the force, efficiently absorbs and releases deformation energy, alleviates stress concentration, enables the cross-seam steel plate to ensure the smoothness of the top surface of the member during the beam-end corner deformation, and evenly transmits the vehicle load. At the same time, the overall cross-seam expansion member is modularly produced, facilitating transportation, installation and replacement; the transverse mortise and tenon connection and the elastic sealing wing plate are provided to ensure coordinated deformation and waterproof sealing, reducing the on-site workload and the later maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of an assembled elastic seamless expansion joint structure of the present invention; Figure 2 It is a structural schematic diagram of the end-sealing angle steel and the anchoring section steel in an assembled elastic seamless expansion joint structure of the present invention; Figure 3 It is a structural composition schematic diagram of the cross-seam expansion member in an assembled elastic seamless expansion joint structure of the present invention; Figure 4 It is a structural cross-sectional schematic diagram of the corrugated expansion plate in an assembled elastic seamless expansion joint structure of the present invention; Figure 5 It is a working schematic diagram of Step 1 and Step 2 in an assembled elastic seamless expansion joint structure of the present invention; Figure 6 It is a working schematic diagram of Step 3 and Step 4 in an assembled elastic seamless expansion joint structure of the present invention.

[0014] In the figures: 100, cross-seam expansion member; 101, top protection layer; 102, built-in steel skeleton; 103, outer elastic body; 104, corrugated expansion plate; 105, cross-seam steel plate; 106, pre-tensioning base; 200, sealing layer; 300, bridge paving layer; 400, pre-buried steel bars in the beam groove; 500, buffer layer; 600, groove-anchoring concrete; 700, connecting steel bars; 800, quick-anchoring embedded parts; 900, bridge beam; 110, end-sealing angle steel; 120, anchoring section steel. Detailed implementation manners

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] In the field of bridge expansion joints, the prior art has the following significant defects: 1. In terms of mechanical properties: When the traditional expansion joint bears the impact of vehicle loads for a long time, it is difficult to effectively disperse and absorb the impact force. For example, in the common slotted expansion joint, its structure cannot accurately buffer the telescopic deformation of the beam body, resulting in concentrated stress at the cross-seam part, accelerating the damage of the expansion joint and the surrounding structure, shortening the service life, increasing the maintenance cost. Even for some seamless expansion joints, when dealing with the frequent passage of heavy-duty vehicles, they cannot provide sufficient compressive strength and buffering performance, affecting the safety of the bridge structure.

[0017] 2. In terms of waterproofing and drainage: The traditional slotted expansion joint has obvious gaps, and rainwater and sundries can easily penetrate into the bridge structure through the gaps, corroding key components such as the beam body steel bars and bearings, reducing the durability of the bridge structure. Although some seamless expansion joints reduce the gaps to a certain extent, due to defects in materials and structural design, the waterproof effect is still not ideal and cannot effectively prevent water intrusion for a long time.

[0018] To achieve the above object, the present invention provides the following technical solution, an assembled elastomeric seamless expansion joint structure, as shown in Figure 1 shown: It includes a bridge beam body 900, two groups of symmetric cross-seam expansion components 100 and beam body notch embedded steel bars 400; During the construction of the bridge beam body 900, the beam body notch embedded steel bars 400 are accurately arranged at the beam body notch in advance to ensure that their positions and specifications meet the design requirements, providing a basis for the installation of subsequent components.

[0019] Install the two groups of symmetric cross-seam expansion components 100 at appropriate positions. When installing the cross-seam expansion components 100, pay attention to their relative position relationship with the beam body notch to ensure the installation accuracy to achieve good telescopic and sealing performance.

[0020] After the installation is completed, conduct a comprehensive debugging and inspection of the entire structure. Check whether the connections of all components are stable and whether the cross-seam expansion components 100 can work normally to ensure that the structure is in the best state before being put into use.

[0021] In some embodiments, according to Figure 1 and Figure 3 As shown, the cross-seam expansion member 100 has a top surface protective layer 101. A plurality of longitudinal hydrophobic grooves are formed on the surface of the top surface protective layer 101. The depth of the plurality of longitudinal hydrophobic grooves is set to 5-10 mm, the width is 20-30 mm, and they are evenly distributed along the length direction of the expansion joint opened at the beam end of the bridge beam 900. The bottom of the longitudinal hydrophobic grooves is provided with a slope of 1%-2% in the bridge drainage direction to ensure that the accumulated water can flow smoothly into the drainage system. On both side edges of the cross-seam expansion member 100, hydrophobic diversion plates are installed. The hydrophobic diversion plates are made of stainless steel, with a height of 30-50 mm and an angle of 45°-60° with the side surface of the cross-seam expansion member 100. When there is accumulated water on the bridge deck, the accumulated water first flows into the longitudinal hydrophobic grooves and then is guided to the bridge drainage system by the hydrophobic diversion plates, avoiding the accumulation of water at the expansion joint and affecting the driving safety of the road surface;

[0022] According to the embodiments of the present invention, specifically: During the construction of the bridge beam 900, a beam body notch is reserved according to the design requirements and the embedded steel bars 400 of the beam body notch are accurately arranged. At the same time, the cross-seam expansion member 100 and its attached top surface protective layer 101, hydrophobic diversion plates, etc. are prefabricated in the factory to ensure that the dimensional accuracy and performance of each component meet the standards.

[0023] Then the cross-seam expansion member 100 is installed at the designated position. During the installation process, attention should be paid to the direction of the longitudinal hydrophobic grooves on the top surface protective layer 101 of the cross-seam expansion member 100 to ensure that it is consistent with the bridge drainage direction. At the same time, the hydrophobic diversion plates on both side edges of the cross-seam expansion member 100 are installed to ensure that their angles and positions are accurate to achieve a good drainage effect.

[0024] When a vehicle passes through the expansion joint or the beam body undergoes expansion and contraction deformation, the impact force first acts on the cross-seam expansion member 100.

[0025] The accumulated water on the bridge deck flows into the longitudinal hydrophobic grooves on the top surface protective layer 101 of the cross-seam expansion member 100 under the action of gravity. The slope at the bottom of the grooves causes the accumulated water to flow in the drainage direction. When the accumulated water reaches both side edges of the cross-seam expansion member 100, the hydrophobic diversion plates guide the accumulated water to the bridge drainage system to achieve rapid drainage and keep the surface of the expansion joint dry.

[0026] In some embodiments, according to Figure 1As shown in the figure, a quick - anchoring embedded part 800 is connected to the side end of the embedded steel bar 400 in the beam - body notch. Notch - anchoring concrete 600 is arranged inside the embedded steel bar 400 in the beam - body notch, which is used to anchor and protect the quick - anchoring embedded part 800 to ensure reliable force transmission of the expansion device. After the notch - anchoring concrete 600 is poured, its top surface should be flush with the top surface of the quick - anchoring embedded part 800. Its material can be high - strength and high - toughness concrete, fiber concrete, ultra - high - performance concrete, etc. The cross - joint expansion member 100 is anchored on the quick - anchoring embedded part 800. A buffer layer 500 is arranged between the cross - joint expansion member 100 and the notch - anchoring concrete 600. A sealing layer 200 is laid on the side of the cross - joint expansion member 100. A bridge pavement layer 300 is laid on the side of the sealing layer 200. A connecting steel bar 700 is connected between the quick - anchoring embedded part 800 and the embedded steel bar 400 in the beam - body notch.

[0027] The quick - anchoring embedded part 800 is composed of a sealing - end angle steel 110, an anchoring section steel 120 and a connecting steel plate. The sealing - end angle steel 110 is used to protect the notch - anchoring concrete 600, prevent the concrete edge from being damaged under the action of external factors (such as vehicle - load impact, rain erosion, etc.), and improve the durability of the concrete. The anchoring section steel 120 is used to fix the cross - joint expansion member 100, so that various forms of anchoring devices (such as bolt holes, card slots, etc.) are preset on the anchoring section steel 120 according to the anchoring requirements of the cross - joint expansion member 100, which can adapt to the cross - joint expansion member 100 with different connection methods, enhancing the versatility and flexibility of the structure. The connecting steel plate is used to fix the sealing - end angle steel 110 and the anchoring section steel 120 to form an integral body, ensuring that the quick - anchoring embedded part 800 can work together when stressed, improving the overall bearing capacity, and being connected and fixed to the embedded steel bar 400 in the beam - body notch through the connecting steel bar 700. This connection method can effectively transmit the load from the cross - joint expansion member 100, making the expansion - joint structure closely combined with the bridge beam body 900 to form a stable force - bearing system. During the vehicle driving process, the load is transmitted from the cross - joint expansion member 100 to the anchoring section steel 120, and then transmitted to the embedded steel bar 400 in the beam - body notch and the bridge beam body 900 through the connecting steel bar 700, ensuring that the load - transmission path is clear and reliable.

[0028] Among them, the notch - anchoring concrete 600 is made of materials such as high - strength and high - toughness concrete, fiber concrete or ultra - high - performance concrete, and is poured inside the embedded steel bar 400 in the beam - body notch to form a firm anchor and protection for the quick - anchoring embedded part 800. Its high - strength characteristic can effectively restrain the quick - anchoring embedded part 800 to prevent it from displacing or loosening under the action of the load. At the same time, its good durability and crack - resistance performance can resist the erosion of the external environment and extend the service life of the expansion - joint structure. After the notch - anchoring concrete 600 is poured, its top surface is flush with the top surface of the quick - anchoring embedded part 800, ensuring the flatness of the installation of the cross - joint expansion member 100 and avoiding local stress concentration and driving bumps caused by height differences.

[0029] The corrugated expansion plate 104 is made of steel plates with a thickness of 0.4 mm - 2 mm. Its corrugations can be rectangular, trapezoidal, or U-shaped. The corrugations of the corrugated expansion plate 104 are designed with dynamic parameters, established based on the expansion and contraction capacity of the expansion joint. Through parameter optimization, the bending stiffness is precisely matched to the expansion and contraction displacement requirements of 40 mm - 160 mm, improving the load-bearing efficiency compared to traditional corrugated structures. When the bridge girder 900 expands and contracts, the corrugated expansion plate 104 can absorb and release deformation energy with higher efficiency, effectively alleviating the stress concentration problem of the bridge structure. For example, when the bridge girder 900 expands and contracts due to temperature changes, the corrugated expansion plate 104 can elastically deform with the expansion and contraction of the girder, maintaining close contact with the girder to ensure the normal operation of the expansion joint.

[0030] The corrugated expansion plate 104 is provided with staggered openings at the wave crests, wave troughs, and webs to ensure that the elastic body can form effective bonding and collaborative force with the corrugated expansion plate 104. The opening forms of the corrugated expansion plate 104 can be circular, elliptical, or oblong. To ensure that the corrugated expansion plate 104 has sufficient elastic stiffness, the opening ratio is controlled within 40%, enhancing the bonding effect with the outer elastic body 103 and enabling the two to work together, further improving the overall performance of the cross-gap expansion member 100.

[0031] The cross-gap steel plate 105 is arranged at the bottom of the cross-gap expansion member 100, and its bottom surface is flush with the bottom surface of the cross-gap expansion member 100 to ensure that the top surface of the cross-gap expansion member 100 remains smooth when the beam end undergoes angular deformation, that is, (when the bridge beam end undergoes angular deformation, the cross-gap steel plate 105 can ensure the smoothness of the top surface of the cross-gap expansion member 100, enabling the vehicle load to be evenly transmitted to the girder, avoiding local load concentration caused by beam end rotation, and reducing damage to the expansion joint and the bridge girder 900). When the expansion joint model is greater than 80 mm, a cross-gap steel plate 105 can be added on the top surface of the quick-anchoring embedded part 800 at the bottom to ensure that the cross-gap expansion member 100 still has sufficient load-bearing capacity for vehicle loads when the beam end gap is greater than 80 mm, ensuring the safety and stability of the bridge under various working conditions.

[0032] The anchoring ear plate is used for the connection between the cross-gap expansion member 100 and the quick-anchoring embedded part 800. Its connection methods include but are not limited to bolt connection, snap connection, etc. Through diverse connection methods, it can be selected according to different engineering requirements and construction conditions, improving the construction convenience and adaptability. For example, in the case of limited construction space, snap connection can be selected to quickly complete the installation; for bridges with higher load-bearing requirements, bolt connection can provide a more reliable anchoring effect.

[0033] The pre-tensioning base 106 is used to connect with a special tensioning device, and its function is to realize the pre-tensioning installation of the cross-gap expansion member 100. The pre-tensioning process enables the cross-gap expansion member 100 to be in a certain stress state during installation, which can better adapt to load changes and expansion and contraction deformations during the service of the bridge, improve the durability and stability of the structure. Through pre-tensioning, the deformation of the cross-gap expansion member 100 under the initial load can be effectively reduced, and its service life can be extended.

[0034] The outer elastic body 103 wraps the external part of the internal steel skeleton 102 and is tightly combined with the corrugated expansion plate 104, providing elastic buffering and sealing functions for the cross-gap expansion member 100. Under the action of vehicle loads, the outer elastic body 103 can absorb part of the impact force and reduce the impact on the internal steel skeleton 102. At the same time, its sealing performance can prevent rainwater, sundries, etc. from entering the inside of the expansion joint, avoiding erosion of the bridge structure and protecting the durability of the bridge.

[0035] Intelligent monitoring elements (integrated sensors, such as load sensors, high-precision stress sensors, displacement sensors, etc.) are arranged in the cross-gap expansion member 100, which can monitor the temperature, expansion amount, and pressure load borne by the cross-gap expansion member 100 in real time. When the monitored values exceed the set range of the cross-gap expansion member 100, the intelligent monitoring elements will give an alarm to realize the pre-maintenance of the expansion joint. Through the real-time monitoring and early warning functions, potential problems of the expansion joint structure, such as abnormal deformation, overloading, etc., can be detected in time, enabling maintenance personnel to take measures before the problems deteriorate, realizing the pre-maintenance of the expansion joint, reducing the maintenance cost, and improving the safety and reliability of the bridge. For example, when the load sensor monitors abnormal pressure caused by vehicle overloading, timely alarm can avoid irreversible damage to the expansion joint and the bridge structure due to overloading.

[0036] The cross-gap expansion member 100 adopts a modular production process. Its size along the length direction of the expansion joint can be 0.5m, 1m, 1.5m or other sizes that meet the engineering requirements. This modular design is convenient for transportation, installation, and replacement, improving the construction efficiency. During the construction process, the appropriate number and size of modules can be selected according to the actual length of the expansion joint for assembly, reducing the on-site processing workload. In later maintenance, if a certain module is damaged, the module can be replaced separately without large-scale disassembly and reconstruction of the entire expansion joint, reducing the maintenance cost and maintenance time. The cross-gap expansion member 100 adopts a mortise and tenon connection method transversely. The shapes of the mortise and tenon can be trapezoidal in reverse, rectangular, etc. Using the good connection strength and stability of the mortise and tenon connection method, it can ensure the coordinated deformation of multiple modules during the operation of the expansion joint.

[0037] After the transverse mortise and tenon connection of the across-seam expansion member 100, an elastic sealing wing plate is arranged at the joint to form an integral expansion device with the effect of sealing and waterproofing. The elastic sealing wing plate can be made of steel plates, fiber composite materials, etc. The elastic sealing wing plate and the side surface of the bridge girder 900 form a labyrinth sealing structure, effectively preventing rainwater, sundries, etc. from invading the inside of the expansion joint, protecting the bridge structure from erosion, and at the same time reducing the damage of the expansion joint components and the driving noise caused by poor sealing.

[0038] A sealing layer 200 is laid on the side of the across-seam expansion member 100, and a bridge paving layer 300 is laid on the side end of the sealing layer 200.

[0039] A buffer layer 500 is arranged between the across-seam expansion member 100 and the notch anchoring concrete 600. Its function is to effectively absorb the impact force between the across-seam expansion member 100 and the notch anchoring concrete 600 under the action of wheel loads, reduce the impact noise, and effectively improve the overall service life of the structure at the same time. The buffer layer 500 can be made of rubber pads, elastic mortar or other elastic thin layers.

[0040] The sealing layer 200 is arranged in a continuous manner between the across-seam expansion member 100 and the bridge paving layer 300, and its function is to ensure the smoothness of the bridge deck.

[0041] According to the embodiments of the present invention, further specifically: during the construction process of the bridge girder 900, a beam body notch is reserved according to the design requirements, and the embedded steel bars 400 of the beam body notch are accurately arranged. At the same time, the quick-anchoring embedded parts 800 are manufactured according to the design specifications, including the processing and assembly of the end-sealing angle steel 110, the anchoring steel 120 and the connecting steel plates, ensuring that the dimensions of each component are accurate and the quality is reliable.

[0042] The quick-anchoring embedded part 800 is connected and fixed to the embedded steel bar 400 of the beam body notch through the connecting steel bar 700, and the position of the quick-anchoring embedded part 800 is adjusted to meet the design requirements, providing an accurate reference for the subsequent construction.

[0043] After the installation of the quick-anchoring embedded part 800 is completed, the notch anchoring concrete 600 is poured. Materials such as high-strength and high-toughness concrete, fiber concrete or ultra-high-performance concrete are selected, and the pouring operation is carried out according to the construction specifications to ensure that the concrete is filled densely. After pouring, the top surface is flush with the top surface of the quick-anchoring embedded part 800. After pouring, appropriate curing is carried out to make the concrete reach the design strength.

[0044] According to the design requirements of the expansion joint, select a cross-joint expansion member 100 with appropriate dimensions. For the cross-joint expansion member 100 connected and anchored by bolts, align its anchoring ear plate with the preset anchoring bolt holes on the anchoring steel 120 and use bolts for connection and fixation. For those using snap connection, accurately fit and install the anchoring ear plate with the anchoring slot. If other connection methods are adopted, install according to the corresponding preset anchoring device. During the installation process, connect the pre-tensioning base 106 with the special tensioning equipment to pre-tension and install the cross-joint expansion member 100 to make it reach the designed initial stress state.

[0045] After the installation of the cross-joint expansion member 100 is completed, lay a buffer layer 500 between the cross-joint expansion member 100 and the slot anchoring concrete 600. Select rubber pads, elastic mortar or other elastic thin-layer materials to ensure that the buffer layer 500 is evenly laid and closely adheres to the two components to effectively absorb the impact force. Then, lay a sealing layer 200 on the side of the cross-joint expansion member 100 to ensure that the sealing layer 200 is tightly connected to the cross-joint expansion member 100 and the bridge deck paving layer 300 to achieve a smooth transition of the bridge deck.

[0046] Horizontally connect multiple cross-joint expansion members 100 along the length direction of the expansion joint. Adopt the mortise and tenon connection method and select mortise and tenon shapes such as inverted trapezoid and rectangle according to the design. After the connection is completed, set an elastic sealing wing plate at the joint, made of steel plates, fiber composite materials, etc., to form a labyrinth sealing structure and enhance the sealing and waterproof performance of the expansion device.

[0047] Install intelligent monitoring elements in the cross-joint expansion member 100, connect the relevant circuits to ensure that parameters such as the temperature, expansion amount, and pressure load borne by the cross-joint expansion member 100 can be monitored in real time. After the installation is completed, conduct debugging and set the upper and lower limits of the monitored values to ensure that the intelligent monitoring elements can give an alarm normally when the monitored values exceed the set range.

[0048] After the construction of the sealing layer 200 is completed, carry out the construction of the bridge deck paving layer 300, and perform operations such as laying and compaction according to the construction process requirements of the bridge deck paving layer 300 to ensure that the bridge deck paving layer 300 is tightly combined with the sealing layer 200 to form a flat and solid bridge deck.

[0049] When the bridge beam 900 undergoes expansion and contraction deformation due to factors such as temperature change, shrinkage creep, or vehicle load, the corrugated expansion plate 104 of the cross-joint expansion member 100 will undergo elastic deformation accordingly. The special corrugated design and the opening structure of the corrugated expansion plate 104 enable it to cooperate with the outer elastic body 103 to bear the force and effectively adapt to the expansion and contraction displacement of the beam body. At the same time, when the cross-joint steel plate 105 undergoes angular deformation at the beam end, it ensures the smoothness of the top surface of the cross-joint expansion member 100, enables the vehicle load to be evenly transmitted to the beam body, and ensures the normal operation of the expansion joint.

[0050] Under the action of wheel loads, the buffer layer 500 comes into play. Elastic materials such as rubber pads and elastic mortar undergo elastic deformation when being squeezed, absorbing the impact force between the joint-span expansion component 100 and the notch-anchoring concrete 600, and converting mechanical energy into other forms of energy such as heat energy, thereby reducing impact noise and protecting the structure from being damaged by excessive impact force.

[0051] The sealing layer 200 and the elastic sealing wing plate together constitute a sealing system. The sealing layer 200 ensures the sealing between the joint-span expansion component 100 and the bridge deck pavement 300, preventing rainwater and sundries from entering the expansion joint through the gap between the two. The labyrinth sealing structure formed by the elastic sealing wing plate and the side surface of the bridge beam body 900 further enhances the waterproof effect, making it difficult for rainwater and the like to invade the inside of the expansion joint and protecting the structure from water erosion.

[0052] The intelligent monitoring elements continuously monitor parameters such as the temperature, expansion amount, and pressure load of the joint-span expansion component 100. When the temperature changes abnormally, the expansion amount exceeds the design range, or the pressure load is too large, the intelligent monitoring elements send an alarm signal to relevant personnel, indicating that the expansion joint needs to be inspected and maintained to avoid further deterioration of the problem.

[0053] Combined with factors such as the service life of the bridge, traffic flow, and environmental temperature, preventive adjustment is carried out on the expansion joint. For bridges with a long service life and large traffic flow, the inspection cycle is appropriately shortened, and the expansion joint is maintained in advance. In seasons with large temperature changes, the monitoring of the expansion amount of the expansion joint is strengthened, and fine adjustment of the joint-span expansion component 100 is carried out if necessary to adapt to the expansion and contraction needs of the beam body and ensure that the expansion joint is always in good working condition.

[0054] On the other hand, the present invention provides an installation method for the above-mentioned assembled elastomeric seamless expansion joint structure, including the following steps: Step 1: Clean the bridge expansion joint notch.

[0055] Determine the position of the quick-anchoring embedded part 800 by hanger positioning.

[0056] When positioning the quick-anchoring embedded part 800, the pre-tension displacement of the joint-span expansion component 100 should be considered.

[0057] Connect the quick-anchoring embedded part 800 to the embedded steel bars 400 of the beam body notch.

[0058] Step 2: Pour the notch-anchoring concrete 600, and control its top surface to be flush with the top surface of the quick-anchoring embedded part 800.

[0059] Cover the notch-anchoring concrete 600 with a film for curing.

[0060] After the notch-anchoring concrete 600 reaches the design strength, set the buffer layer 500 on the top surface.

[0061] Step 3: Use a tensioning device to tension the single-piece cross-gap expansion member 100, and its pre-tensioning amount is determined comprehensively according to the installation temperature and the annual expansion amount of the bridge.

[0062] Anchor and install the cross-gap expansion member 100 at the tensioning port to the quick-anchoring embedded part 800 by using a bolt or buckle connection method.

[0063] Install the cross-gap expansion members 100 one by one, and set elastic sealing wing plates at the joints after the transverse mortise and tenon connection of every two cross-gap expansion members 100.

[0064] Step 4: Chisel the exposed part of the groove-mouth anchoring concrete 600 to form a rough surface.

[0065] Bind the steel bar mesh.

[0066] Construct the sealing layer 200 and cure it to the design strength to complete the installation of the seamless expansion device.

[0067] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembled elastomeric seamless expansion joint structure, characterized in that: It includes a bridge beam body (900), two groups of symmetric cross-seam expansion components (100) and embedded steel bars (400) in the beam body notch. The cross-seam expansion component (100) has a top surface protective layer (101). A plurality of longitudinal hydrophobic grooves are formed on the surface of the top surface protective layer (101). The depth of the plurality of longitudinal hydrophobic grooves is set to 5-10 mm, the width is 20-30 mm, and they are evenly distributed along the length direction of the expansion joint opened at the beam end of the bridge beam body (900).

2. The prefabricated elastomeric seamless expansion joint structure according to claim 1, characterized in that: A quick-anchoring embedded part (800) is connected to the side end of the embedded steel bar (400) in the beam body notch. Notch anchoring concrete (600) is arranged inside the embedded steel bar (400) in the beam body notch, which is used to anchor and protect the quick-anchoring embedded part (800).

3. The assembled elastomeric seamless expansion joint structure according to claim 1, characterized in that: A buffer layer (500) is arranged between the cross-seam expansion component (100) and the notch anchoring concrete (600). A connecting steel bar (700) is connected between the quick-anchoring embedded part (800) and the embedded steel bar (400) in the beam body notch.

4. The assembled elastomeric seamless expansion joint structure according to claim 1, wherein: A sealing layer (200) is laid on the side of the cross-seam expansion component (100), and a bridge paving layer (300) is laid on the side of the sealing layer (200).

5. The assembled elastomeric seamless expansion joint structure according to claim 2, wherein: The quick-anchoring embedded part (800) is composed of a sealing end angle steel (110), an anchoring section steel (120) and a connecting steel plate.

6. The assembled elastomeric seamless expansion joint structure according to claim 5, characterized in that: The sealing end angle steel (110) is used to protect the notch anchoring concrete (600), and the connecting steel plate is used to fix the sealing end angle steel (110) and the anchoring section steel (120) to form an integral body.

7. The prefabricated elastomeric seamless expansion joint structure according to claim 1, characterized in that: The cross-seam expansion component (100) includes an outer elastic body (103) and an inner steel skeleton (102). The inner steel skeleton (102) is composed of a corrugated expansion plate (104), an anchoring ear plate, a cross-seam steel plate (105) and a pre-tensioning base (106).

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