Bridge expansion joint comb plate with color anti-skid wear layer

Abstract

The utility model discloses a kind of road and bridge expansion joint comb plate with color antiskid wearing layer, it is related to road and bridge engineering technical field, the comb plate includes concrete surface layer and movable comb plate, the concrete surface layer and movable comb plate are all set on, steel plate load-bearing area of the movable comb plate is covered with color antiskid wearing layer, the color antiskid wearing layer includes primer and antiskid aggregate.The utility model antiskid aggregate adopts diamond wear-resistant particle, effectively resists centrifugal force generated by vehicle driving on small radius curve bridge, reduces vehicle skidding risk;Wearing layer adopts yellow or red, can provide eye-catching visual warning under low-visibility weather such as rain and fog, help driver to identify curve area in advance, actively decelerate, combine high skid resistance, form "visual warning+physical skid resistance" dual security, further reduce the incidence of curve accident.

Description

Technical Field

[0001] This utility model relates to the field of road and bridge engineering technology, specifically a road and bridge expansion joint comb plate with a colored anti-slip wear layer. Background Technology

[0002] In road and bridge engineering, expansion joints are key components that ensure the structure can adapt to deformation caused by temperature changes and loads. Among them, comb-plate expansion joints (such as the 160 type) are widely used due to their structural stability. However, in the scenario of small-radius curved bridges on highways (such as ramp curves), existing comb-plate expansion joints have obvious defects and cannot meet the requirements of driving safety.

[0003] Existing expansion joints typically have only a few anti-slip grooves on the steel plate surface or rely on friction from the metal itself. Because vehicles traveling on small-radius curved bridges experience significant centrifugal force, and the steel plate surface is inherently smooth with insufficient density of anti-slip grooves, the coefficient of friction between the tire and the steel plate decreases significantly in rainy conditions, greatly increasing the risk of vehicles skidding and colliding with guardrails.

[0004] To address this issue, some improvements have been proposed in existing technologies, such as increasing the groove depth or applying ordinary anti-slip coatings to the steel plate surface. However, these solutions still have several shortcomings: First, existing improvements are not optimized for the specific scenario of high centrifugal force on small-radius curved bridges, and their anti-slip performance still cannot meet the actual usage requirements. Second, ordinary anti-slip coatings have poor wear resistance and are prone to peeling off under the frequent crushing action of high-speed vehicles on highways. Furthermore, ordinary coatings lack visual warning functions and cannot effectively remind drivers.

[0005] Therefore, there is an urgent need for an improved solution for the expansion joint of the comb plate that is simple in structure, durable, and has both anti-skid and warning functions, in order to solve the problems existing in the current technology and ensure the driving safety of small-radius curved bridges on highways. Utility Model Content

[0006] The purpose of this invention is to provide a bridge expansion joint comb plate with a colored anti-slip wear layer to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A bridge expansion joint comb plate with a colored anti-slip wear layer includes a concrete surface layer and a movable comb plate, both of which are disposed on the surface. The steel plate load-bearing area of ​​the movable comb plate is covered with a colored anti-slip wear layer, which includes a base layer and anti-slip aggregate.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the thickness of the colored anti-slip wear layer is 3-5 mm.

[0009] In one alternative: the colored anti-slip wear layer is yellow or red.

[0010] In one alternative: the anti-slip aggregate is diamond wear-resistant particles.

[0011] In one alternative: the diamond wear-resistant particles have a particle size of 2-5 mm.

[0012] In one alternative: the base coating is made of a two-component modified polymer resin.

[0013] In one alternative: a waterstop is provided in the gap below the movable comb plate.

[0014] In one alternative: the color of the anti-slip aggregate is the same as the color of the base coating.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses diamond wear-resistant particles as anti-skid aggregate. Its high hardness makes the surface of the wear layer form a stable micro-roughness. Even in rainy conditions, it can significantly increase the friction coefficient between the tire and the wear layer, effectively resist the centrifugal force generated by vehicles driving on small-radius curved bridges, and reduce the risk of vehicle skidding.

[0016] This invention only requires routine cleaning of the steel plate base surface of the comb plate, without changing the main structure of the expansion joint (such as the original connection method and structural form of the base and movable comb plate). The construction process is simple, the operation is easy, and the material cost is controllable. It is easy to promote and apply in existing road and bridge expansion joint renovation and new construction projects.

[0017] The thickness of the colored anti-slip wear layer of this utility model is set at 3-5mm, which takes into account both wear resistance and flexibility. It can resist the wear caused by long-term rolling of wheels and adapt to the expansion and contraction deformation of roads and bridges, thus avoiding cracking or peeling of the wear layer. At the same time, the combination of the two-component modified polymer resin primer and diamond aggregate extends the service life of the wear layer compared with ordinary anti-slip coatings.

[0018] The wear layer of this invention is yellow or red, which can provide a conspicuous visual warning in low visibility weather such as rain and fog, helping drivers to identify the curve area in advance and actively slow down. Combined with high anti-skid performance, it forms a dual safety guarantee of "visual warning + physical anti-skid", further reducing the incidence of curve accidents. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram illustrating the implementation scope of the colored anti-slip wear layer for the expansion joint of the comb plate according to this utility model.

[0021] Attached diagram annotations: 1. Main bridge structure; 2. Concrete surface layer; 3. Movable comb plate; 4. Colored anti-slip wear layer; 5. Waterstop. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In one embodiment, such as Figures 1-2 As shown, a bridge expansion joint comb plate with a colored anti-slip wear layer includes a concrete surface layer 2 and a movable comb plate 3. Both the concrete surface layer 2 and the movable comb plate 3 are set on 1. The steel plate load-bearing area of ​​the movable comb plate 3 is covered with a colored anti-slip wear layer 4, which includes a base layer and anti-slip aggregate.

[0024] In one embodiment, the thickness of the colored anti-slip wear layer 4 is 3-5 mm.

[0025] The thickness of the colored anti-slip wear layer is set at 3-5mm, which takes into account both wear resistance and flexibility. It can resist the wear caused by long-term rolling of wheels and adapt to the expansion and contraction of roads and bridges, avoiding cracking or peeling of the wear layer. At the same time, the combination of two-component modified polymer resin primer and diamond aggregate makes the service life of the wear layer more than twice that of ordinary anti-slip coatings.

[0026] In one embodiment, the colored anti-slip wear layer 4 is yellow or red.

[0027] The wear layer is yellow or red, providing a high-visibility visual warning in low-visibility weather conditions such as rain and fog, helping drivers to identify curves in advance and proactively slow down. Combined with high anti-skid performance, it forms a dual safety guarantee of "visual warning + physical anti-skid," further reducing the incidence of curve accidents. In one embodiment, the anti-slip aggregate is diamond wear-resistant particles.

[0028] The anti-skid aggregate uses diamond wear-resistant particles, whose high hardness creates a stable micro-roughness on the surface of the wear layer. Even in rainy conditions, it can significantly increase the coefficient of friction between the tire and the wear layer, effectively resisting the centrifugal force generated by vehicles traveling on small-radius curved bridges and reducing the risk of vehicle skidding.

[0029] In one embodiment, the diamond wear-resistant particles have a particle size of 2-5 mm.

[0030] In one embodiment, the primer layer is a two-component modified polymer resin.

[0031] A two-component modified polymer resin primer is used to achieve an ultra-thin 3-5mm colored seal layer structure. The primer has strong adhesion to the comb plate steel plate and can maintain a stable connection even under long-term expansion and contraction, temperature changes and wheel rolling, making it durable and preventing the wear layer from separating from the steel plate.

[0032] In one embodiment, a waterstop strip 5 is provided in the lower gap of the movable comb plate 3.

[0033] In one embodiment, the color of the anti-slip aggregate is the same as the color of the base coat.

[0034] The anti-slip aggregate is the same color as the base coating, making the overall color of the colored anti-slip wear layer uniform. It not only has functionality, but also enhances the visual aesthetics of the road and bridge expansion joint area and improves the overall visual effect of the road.

[0035] The comb-tooth plate for road and bridge expansion joints is particularly suitable for the comb-tooth plate expansion joints of small-radius curved bridges on highways. It can specifically solve the driving safety problems in this scenario. It can also be applied to ordinary roads, municipal bridges and other scenarios where there is a need for the anti-skid performance and warning function of expansion joints.

[0036] The above embodiments disclose a bridge and road expansion joint comb plate with a colored anti-slip wear layer. Its specific working principle and process are as follows: S1: Laying out and positioning: The colored anti-slip wear layer is applied manually by scraping. Before application, the construction area of ​​the wear layer is marked on the steel plate surface with a marker or ink line according to the load-bearing area of ​​the movable comb plate, ensuring that the construction area accurately covers the entire load-bearing area. Then, the amount of primer coating is calculated based on the construction area. The amount of primer coating is controlled at 1.5-2.5 kg / ㎡ to avoid insufficient application leading to missed areas or excessive application causing accumulation, ensuring that the primer coating is evenly distributed during subsequent scraping.

[0037] S2: Base surface cleaning: To ensure the adhesion of the primer coating to the steel plate surface, the steel plate substrate of the comb-tooth plate expansion joint must be thoroughly cleaned: (1) Foam sealant is used to seal and protect the groove between the fixing plate and the large plate teeth of the comb plate to prevent debris from entering the groove during the cleaning process. At the same time, tape is pasted around the steel plate and the joint of the road and bridge concrete surface to avoid the paint from contaminating the concrete surface during subsequent construction and to ensure the cleanliness of the construction area. (2) Rust removal treatment of steel plate surface can be carried out by sandblasting or manual grinding with a grinding wheel. If sandblasting is used, the surface treatment quality should reach Sa3 grade as specified in GB / T8923 (no visible grease, dirt, scale, rust and paint coating on the steel surface, and any residual traces should only be slight spots or streaks). If manual tools are used for rust removal, the surface treatment quality should reach St3 grade as specified in GB / T8923 (no visible grease or dirt on the steel surface, and no loosely attached scale, rust and paint coating, etc., the rust removal should be more thorough than St2 grade, and the surface of the exposed part of the substrate should have a metallic luster). After rust removal, the surface roughness of the steel should be controlled to Rz40μm to enhance the bonding force between the base coating and the steel plate. (3) Clean the bolt holes and grooves on the steel plate (such as rust fragments, dust, etc.). If there is oil pollution on the surface of the steel plate, wipe the polluted area with alcohol to ensure that there is no oil or debris on the surface of the steel plate.

[0038] S3: Ingredients: The primer coating uses a two-component modified polymer resin coating, which is prepared according to the mass ratio of component A to component B of 3:1. Component A and component B are poured into a mixing container and stirred with an electric stirrer for 3-5 minutes until there are no powder particles or powder sediments in the coating, forming a uniform coating mixture to ensure stable coating performance.

[0039] S4: Apply primer: When applying the primer, follow the principle of "pour and scrape simultaneously". Pour the well-stirred primer evenly onto the steel plate construction area and use a scraper to quickly scrape in the same direction to avoid paint accumulation in the same area, which would result in uneven primer thickness. During the scraping process, ensure that the primer layer is evenly applied without accumulation or dripping, and completely covers the load-bearing area of ​​the steel plate, without any missed areas.

[0040] S5: Spread anti-slip aggregate: After the base coat is evenly applied, immediately spread anti-slip aggregate (diamond wear-resistant particles) evenly over the construction area. During the spreading process, ensure that the aggregate is evenly distributed and that there are no missed areas. Ensure that the base coat is completely covered by the aggregate (without any exposed base coat). The amount of anti-slip aggregate should be controlled at 10-15 kg / m². This amount can ensure the reasonable distribution and bonding of the aggregate within the base coat, avoiding insufficient amount affecting the anti-slip effect or excessive amount causing waste.

[0041] S6: Clean up excess aggregate: After the base coat has undergone cross-linking reaction and is completely cured and dried, the surface of the wear layer is manually cleaned with a steel brush to remove excess anti-slip aggregate that has not been bonded to the base coat, so that the surface of the wear layer is smooth and only the aggregate that is firmly bonded to the base coat is retained.

[0042] S7: Roller-applied top coat: To further improve the durability and color stability of the wear layer, after cleaning off excess aggregate, a yellow or red polymer resin coating is applied to the surface of the wear layer using a roller. The amount of coating used is controlled at 0.4-0.8 kg / m². During the roller application process, it is ensured that the coating evenly covers the surface of the wear layer without any missed spots or drips.

[0043] S7: Detection: After the seal layer has completely solidified, the performance of the colored anti-slip wear layer is tested: the friction coefficient of the wear layer is tested using a pendulum friction coefficient meter, and the friction coefficient (BPN) is required to be ≥60; the texture depth of the wear layer is tested using the sand spreading method, and the texture depth is required to be ≥0.8mm, to ensure that the anti-slip performance of the wear layer meets the design requirements.

[0044] S8: Health Preservation and Open Transportation After construction is completed, warning signs must be set up in accordance with the requirements of JTGH30 "Safety Operation Procedures for Highway Maintenance" and the construction area must be closed for curing. After the roll-coating seal layer is applied, it must be cured at room temperature for 12 hours. Traffic can only be opened after the wear layer is completely dry and its performance is stable, so as to avoid damage to the wear layer caused by opening traffic too early.

[0045] In addition to the above-mentioned preferred embodiment, without changing the core technical solution of this utility model (i.e., "the load-bearing area of ​​the movable comb plate steel plate is covered with a colored anti-slip wear layer composed of a base coating and anti-slip aggregate of the same color"), some parameters can be adjusted according to actual needs: for example, for rainy areas in the south, the particle size of diamond wear-resistant particles can be appropriately increased to 4-5mm to further improve the anti-slip effect; for frigid areas in the north, a low-temperature modified two-component polymer resin can be selected as the base coating to enhance the freeze-thaw resistance of the wear layer; in addition, the comb plate can also be applied to sharp bends of municipal bridges, tunnel entrances and exits, and other scenarios where anti-slip and warning are required, only the construction range of the wear layer needs to be adjusted according to the steel plate size of different scenarios. The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A comb-tooth plate for expansion joints of bridges and highways with a colored anti-slip wear layer, characterized in that, It includes a concrete surface layer (2) and a movable comb plate (3), both of which are set on (1). The steel plate load-bearing area of ​​the movable comb plate (3) is covered with a colored anti-slip wear layer (4), which includes a base layer and anti-slip aggregate.

2. The bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 1, characterized in that, The thickness of the colored anti-slip wear layer (4) is 3-5 mm.

3. The bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 1, characterized in that, The anti-slip aggregate is diamond wear-resistant particles.

4. A bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 3, characterized in that, The particle size of diamond wear-resistant particles is 2-5mm.

5. A bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 1, characterized in that, The base coating is made of a two-component modified polymer resin.

6. A bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 1, characterized in that, A waterstop strip (5) is provided in the lower gap of the movable comb plate (3).

7. A bridge expansion joint toothed plate with a colored anti-slip wear layer according to claim 1, characterized in that, The color of the anti-slip aggregate is the same as the color of the base coating.

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