A high-toughness cement concrete paving structure for rapid repair of curved segment steel bridge deck

Abstract

The utility model discloses a kind of high-toughness cement concrete pavement structures for the rapid repair of curve segment steel bridge deck, including steel box girder, the top of the steel box girder is equipped with sandblasting treatment layer, the top of the sandblasting treatment layer is equipped with interface agent bonding layer, the top of the interface agent bonding layer is equipped with high-toughness cement concrete pavement layer, the top of the high-toughness cement concrete pavement layer is equipped with permeable curing agent layer, the top of the permeable curing agent layer is equipped with antiskid ceramic particle wear layer.The utility model improves durability and adaptability by multilayer composite structure, the bonding force of sandblasting treatment layer, interface agent bonding layer and steel box girder is enhanced, the anti-cracking and anti-fatigue performance of high-toughness cement concrete pavement layer is improved by reinforcing mesh and reinforcing hoop in cooperation with steel fiber, the edge of antiskid ceramic particle wear layer is sealed by sealing rubber strip, drainage groove and water-permeable non-woven fabric prevent water seepage, and overall adaptation curve segment high-frequency load and centrifugal force effect.

Description

Technical Field

[0001] This utility model relates to the field of pavement structure technology, and in particular to a high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks. Background Technology

[0002] Currently, domestic steel bridge deck paving mainly adopts mainstream high-performance steel bridge deck paving technologies such as epoxy asphalt, composite casting, and ERS combined types. However, due to poor performance in some domestic projects, serious early-stage defects have emerged. Epoxy asphalt processes are complex, require strict quality control, and have long curing times, making them prone to defects during construction. If these defects are not thoroughly addressed, they can easily lead to early-stage pavement defects. Furthermore, the harsh operating conditions, including high temperatures, heavy loads, and heavy rainfall, result in even stricter requirements for steel bridge deck paving materials in some southern regions.

[0003] Steel bridge deck pavement is a multi-layered structure. Besides repeated fatigue, it must also resist water seepage and temperature deformation. Under load, the bridge deck undergoes large and frequent elastic deformation, thus requiring pavement layer materials with high strength, high toughness, and fatigue resistance. Ordinary lightweight aggregate concrete is relatively brittle and cannot meet the design requirements for pavement materials in curved steel box girder bridge decks. Therefore, a high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks includes a steel box girder, a sandblasting layer on top of the steel box girder, an interface agent bonding layer on top of the sandblasting layer, a high-toughness cement concrete pavement layer on top of the interface agent bonding layer, a penetrating curing agent layer on top of the high-toughness cement concrete pavement layer, and an anti-slip ceramic particle abrasion layer on top of the penetrating curing agent layer.

[0006] Preferably, the high-toughness cement concrete pavement layer is internally embedded with steel mesh, and the nodes of the steel mesh are provided with reinforcing stirrups. The high-toughness cement concrete pavement layer is mixed with steel fibers and organic retarder.

[0007] Preferably, the ceramic particles in the anti-slip ceramic particle wear layer are bonded together with modified epoxy resin, and the edges of the anti-slip ceramic particle wear layer are provided with sealing strips.

[0008] Preferably, the edge of the high-toughness cement concrete pavement layer is fixedly connected with a drainage groove, and a water-permeable non-woven fabric is bonded inside the drainage groove.

[0009] Preferably, the steel box girder is fixedly connected to the side with an anti-collision guard, and the anti-collision guard is connected and fixed to the edge of the anti-slip ceramic particle wear layer by a sealing strip.

[0010] The beneficial effects of this utility model are as follows: The multi-layer composite structure enhances durability and adaptability. The sandblasting layer strengthens the bond between the interface agent and the steel box girder. The steel mesh and reinforcing stirrups, along with steel fibers, improve the crack resistance and fatigue resistance of the high-toughness cement concrete pavement layer. The anti-slip ceramic particle wear layer seals the edges with sealing strips. Drainage channels and permeable non-woven fabrics prevent water seepage. The overall structure is adapted to high-frequency loads and centrifugal forces on curved sections.

[0011] Balancing rapid repair with long-term safety, organic retarder helps high-toughness cement concrete pavement layers solidify quickly, shortening the construction cycle; penetrating curing agent layer extends the pavement life; anti-slip ceramic particle wear layer improves anti-slip properties; and anti-collision edge enhances structural safety. Compared with traditional processes, it reduces early defects and the number of repairs, lowering the total life cycle cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of a high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks proposed in this utility model. Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the main structure of a high-toughness cement concrete pavement layer for rapid repair of curved steel bridge decks, as proposed in this utility model.

[0013] In the figure: 1 steel box girder, 2 anti-slip ceramic particle wear layer, 3 sealing strip, 4 permeable non-woven fabric, 5 sandblasting treatment layer, 6 interface agent bonding layer, 7 high toughness cement concrete pavement layer, 8 penetrating curing agent layer, 9 drainage channel, 10 anti-collision edge, 11 steel mesh, 12 reinforcing stirrup, 13 steel fiber 1. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-3A high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks includes a steel box girder 1, a sandblasted layer 5 on top of the steel box girder 1, an interface agent bonding layer 6 on top of the sandblasted layer 5, a high-toughness cement concrete pavement layer 7 on top of the interface agent bonding layer 6, a penetrating curing agent layer 8 on top of the high-toughness cement concrete pavement layer 7, and an anti-slip ceramic particle abrasion layer 2 on top of the penetrating curing agent layer 8. The multi-layer composite structure synergistically enhances durability and adaptability. The sandblasted layer 5 strengthens the bond between the interface agent bonding layer 6 and the steel box girder 1. The steel mesh 11 and reinforcing stirrups 12, together with steel fibers 13, improve the crack resistance and fatigue resistance of the high-toughness cement concrete pavement layer 7. The anti-slip ceramic particle abrasion layer 2 is sealed at the edges by sealing strips 3. Drainage channels 9 and permeable non-woven fabric 4 prevent water seepage. The overall structure is adaptable to the high-frequency loads and centrifugal forces of curved sections.

[0016] In this utility model, a steel mesh 11 is embedded inside the high-toughness cement concrete pavement layer 7, and a reinforcing stirrup 12 is provided at the node of the steel mesh 11. The high-toughness cement concrete pavement layer 7 is mixed with steel fiber 13 and organic retarder. The steel mesh 11 and the reinforcing stirrup 12, together with the steel fiber 13, improve the crack resistance and fatigue resistance of the high-toughness cement concrete pavement layer 7. The ceramic particles in the anti-slip ceramic particle wear layer 2 are bonded together with modified epoxy resin. The edge of the anti-slip ceramic particle wear layer 2 is provided with a sealing strip 3, and the edge of the anti-slip ceramic particle wear layer 2 is sealed by the sealing strip 3. The edge of the high-toughness cement concrete pavement layer 7 is fixedly connected to a drainage channel 9. A permeable non-woven fabric 4 is bonded inside the drainage channel 9. The drainage channel 9 and the permeable non-woven fabric 4 prevent water seepage and are adapted to the high-frequency load and centrifugal force of the curved section. The steel box girder 1 is fixedly connected to the side with a crash guard 10. The crash guard 10 is connected and fixed to the edge of the anti-slip ceramic particle wear layer 2 by a sealing strip 3. The crash guard 10 is fixed to the side of the steel box girder 1 and connected to the edge of the anti-slip ceramic particle wear layer 2 by a sealing strip 3, forming a complete pavement structure, realizing rapid repair and long-term protection of the curved section of the steel bridge deck.

[0017] Working Principle: In the idle area of ​​this device, all the components mentioned above, which refer to structural parts, are connected. The specific connection methods should refer to the working principle described below, and the connection between each component is completed in the order of operation. The detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, and will not elaborate further. When using this device, the surface of the steel box girder 1 is first sandblasted to form a sandblasted layer 5, which increases the surface roughness to enhance the bonding force between subsequent layers. Then, an interface agent is evenly applied to the surface of the sandblasted layer 5 to form an interface agent bonding layer 6, providing a solid adhesion foundation for the high-toughness cement concrete pavement layer 7. Next, high-toughness cement concrete is laid, in which steel fibers 13 and organic retarder are premixed. During the laying process, steel mesh 11 with reinforcing stirrups 12 is embedded simultaneously. The high-toughness cement concrete pavement layer 7 is formed by vibration and compaction. The synergistic effect of steel fibers 13 and steel mesh 11 improves the overall crack resistance and shear resistance. After the pavement layer has initially set, a penetrating curing agent is applied to its top to form a penetrating curing agent layer 8, enhancing the surface density and durability. Then, an anti-slip ceramic particle wear layer 2 is laid, its edges sealed to the high-toughness cement concrete pavement layer 7 via sealing strips 3. Simultaneously, drainage channels 9 are fixed to the edges of the pavement layer, and permeable non-woven fabric 4 is placed inside the channels to drain accumulated water. Finally, anti-collision guardrails 10 are fixed to the sides of the steel box girder 1, connected to the edges of the anti-slip ceramic particle wear layer 2 via sealing strips 3, forming a complete pavement structure that enables rapid repair and long-term protection of the curved steel bridge deck.

[0018] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A high-toughness cement concrete pavement structure for rapid repair of curved steel bridge decks, comprising a steel box girder (1), characterized in that, The top of the steel box girder (1) is provided with a sandblasting treatment layer (5), the top of the sandblasting treatment layer (5) is provided with an interface agent bonding layer (6), the top of the interface agent bonding layer (6) is provided with a high-toughness cement concrete pavement layer (7), the top of the high-toughness cement concrete pavement layer (7) is provided with a penetrating curing agent layer (8), and the top of the penetrating curing agent layer (8) is provided with an anti-slip ceramic particle wear layer (2).

2. The structure according to claim 1, characterized in that, The high-toughness cement concrete pavement layer (7) is internally embedded with steel mesh (11), and reinforcing stirrups (12) are provided at the nodes of the steel mesh (11). The high-toughness cement concrete pavement layer (7) is mixed with steel fibers (13) and organic retarder.

3. The structure according to claim 1, characterized in that, The ceramic particles in the anti-slip ceramic particle wear layer (2) are bonded together with modified epoxy resin, and the edge of the anti-slip ceramic particle wear layer (2) is provided with a sealing strip (3).

4. The structure according to claim 1, characterized in that, The edge of the high-toughness cement concrete pavement layer (7) is fixedly connected with a drainage groove (9), and a water-permeable non-woven fabric (4) is bonded inside the drainage groove (9).

5. The structure according to claim 1, characterized in that, The steel box girder (1) is fixedly connected to the side with a crash guard (10), and the crash guard (10) is connected and fixed to the edge of the anti-slip ceramic particle wear layer (2) by a sealing strip (3).

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