Road board based on high-performance concrete

Abstract

The utility model relates to the technical field of road construction, and discloses a road plate based on high-performance concrete, which comprises a rectangular plate body made of ultra-high-performance concrete (UHPC). Connecting structures are arranged on four sides of the plate body, a reinforcing layer is embedded in the plate body, supporting ribs are arranged at the bottom of the plate body, and an anti-skid layer is arranged on the surface of the plate body. Connecting structures are arranged on the peripheries of the plate bodies, a reliable connecting foundation is provided for the adjacent plate bodies, the integrity of the road surface is guaranteed, and displacement caused by differential settlement and vehicle loads is resisted; the reinforcing layer is embedded inside, so that the overall bending resistance, tensile bearing capacity and crack resistance of the plate body are remarkably improved, and the plate body is prevented from cracking or breaking under the load; the supporting ribs are arranged at the bottom and play a role of a beam, so that the flexural rigidity and the bearing capacity of the plate body are greatly improved, meanwhile, the load can be dispersed to a lower-layer foundation, and stress concentration is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of road construction, and more specifically, to road slabs based on high-performance concrete. Background Technology

[0002] Precast road slabs are used to pave temporary roads during construction to avoid affecting road traffic. With the increasing number of vehicles, the traffic pressure on roads is increasing, and road surfaces often require inspection and maintenance.

[0003] The existing precast road slabs have low internal steel reinforcement strength. During long-term use, the load-bearing capacity of the steel reinforcement gradually decreases, and the internal strength decreases. Under the action of alternating stress generated by different vehicles passing by, the bending moment of the road slab increases while the load-bearing capacity decreases, making the road slab prone to cracks. Utility Model Content

[0004] The purpose of this invention is to provide a road slab based on high-performance concrete, which aims to solve the problem of poor load-bearing capacity of existing road slabs.

[0005] This utility model is implemented as follows: a road slab based on high-performance concrete includes a rectangular slab body made of ultra-high performance concrete (UHPC); the four sides of the slab body are provided with connecting structures; a reinforcing layer is embedded inside the slab body; a supporting rib is provided at the bottom of the slab body; and an anti-slip layer is provided on the surface of the slab body.

[0006] Furthermore, the connection structure includes a dovetail groove disposed on the side of the plate or a dovetail tenon that matches the dovetail groove, wherein the dovetail tenon and the dovetail groove interlock; the cross sections of the dovetail tenon and the dovetail groove are complementary dovetail-shaped structures.

[0007] Furthermore, the surface of the dovetail tenon is provided with an elastic sealing strip, and the inner wall of the dovetail groove is coated with a waterproof adhesive layer.

[0008] Furthermore, the reinforcing layer is composed of crisscrossing steel mesh and parallel distributed glass fiber reinforcements, with the glass fiber reinforcements located in the longitudinal center of the plate.

[0009] Furthermore, the supporting ribs are trapezoidal hollow structures, distributed at equal intervals along the length of the plate.

[0010] Furthermore, the anti-slip layer includes diamond-shaped embossed patterns on the surface of the plate and a polyurethane wear-resistant coating covering the embossed surface.

[0011] Furthermore, the plate is provided with lifting holes at its four corners.

[0012] Furthermore, a stainless steel internally threaded sleeve is pre-embedded in the lifting hole, and the internally threaded sleeve is bolted to the lifting device.

[0013] Furthermore, a rubber vibration damping pad is attached to the bottom surface of the plate.

[0014] Furthermore, the plate is provided with a metal buckle, which can be vertically rotated through the dovetail groove and the dovetail tenon; the surface of the metal buckle is covered with an engineering plastic layer.

[0015] Compared with existing technologies, the road slab based on high-performance concrete provided by this utility model has a connecting structure around the slab body, providing a reliable connection foundation for adjacent slabs, ensuring the integrity of the road surface, and resisting displacement caused by uneven settlement and vehicle loads; an internal reinforcing layer is embedded, which significantly improves the overall bending and tensile bearing capacity and crack resistance of the slab body, preventing the slab body from cracking or breaking under load; a supporting rib is set at the bottom, which acts as a beam, greatly improving the bending stiffness and bearing capacity of the slab body, while also helping to distribute the load to the lower foundation and reduce stress concentration; thus solving the problem of poor bearing capacity of road slabs. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of a road slab based on high-performance concrete provided by this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the plate and the internally threaded sleeve provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the structure in which the plates are connected by a connecting structure, as provided by this utility model.

[0019] In the figure: plate 10, connecting structure 20, reinforcing layer 30, supporting rib 40, lifting hole 50, internal threaded sleeve 60, lifting bolt 70, rubber vibration isolation pad 11, metal lock 12, dovetail groove 21, dovetail tenon 22, elastic sealing strip 23. Detailed Implementation

[0020] 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. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.

[0024] The road slab based on high-performance concrete includes a rectangular slab 10, which is made of ultra-high performance concrete (UHPC). UHPC includes cement, fly ash, silica fume, natural river sand, chopped copper-plated steel fibers, and high-efficiency polycarboxylate superplasticizer. The four sides of the slab 10 are provided with connecting structures 20, the slab 10 has a reinforcing layer 30 embedded inside, the bottom of the slab 10 is provided with supporting ribs 40, and the surface of the slab 10 is provided with an anti-slip layer.

[0025] The road slab based on high-performance concrete provided above has a connecting structure 20 around the slab 10, providing a reliable connection foundation for adjacent slabs 10, ensuring the integrity of the road surface, and resisting displacement caused by uneven settlement and vehicle loads; an internal reinforcing layer 30 is embedded, which significantly improves the overall bending and tensile bearing capacity and crack resistance of the slab 10, preventing the slab 10 from cracking or breaking under load; a supporting rib 40 is provided at the bottom, which acts as a beam, greatly improving the bending stiffness and bearing capacity of the slab 10, while also helping to distribute the load to the underlying foundation and reduce stress concentration; thus solving the problem of poor bearing capacity of road slabs.

[0026] Surface safety guarantee: The surface is equipped with an anti-slip layer, which directly increases the friction coefficient of the road surface, ensures vehicle driving safety (especially in rainy and snowy weather), resists wheel wear, and extends the service life of the road surface.

[0027] Overall effect: It integrates material innovation (UHPC) and key structural design (connection structure 20, reinforcement layer 30, support rib 40, anti-slip layer), laying the overall technical foundation for the road slab to be lightweight, high-strength, durable, reliable, safe and stable.

[0028] Cement + fly ash + silica fume: increases density, reduces porosity, and enhances resistance to chemical attack.

[0029] Short-cut copper-plated steel fibers (2-3% content): inhibit crack propagation, increase bending strength by 40-60%, and double impact resistance.

[0030] Natural river sand (particle size ≤ 2mm): Optimized particle size distribution reduces shrinkage and deformation.

[0031] Polycarboxylate superplasticizer: Achieves a water-cement ratio of ≤0.20, ensuring fluidity while improving early strength.

[0032] Using ultra-high performance concrete (UHPC) as the main material, its components (cement, fly ash, silica fume, natural river sand, chopped copper-plated steel fibers, and high-efficiency polycarboxylate superplasticizer) work synergistically to give the slab extremely high compressive strength, flexural strength, toughness, and durability (impermeability, freeze-thaw resistance, and chemical corrosion resistance), significantly extending its service life; the copper-plated steel fibers greatly improve the toughness and crack resistance of the concrete, preventing crack propagation.

[0033] In this embodiment, the connecting structure 20 includes a dovetail groove 21 disposed on the side of the plate 10 or a dovetail tenon 22 that matches the dovetail groove 21. The dovetail tenon 22 and the dovetail groove 21 interlock with each other. The cross sections of the dovetail tenon 22 and the dovetail groove 21 are complementary dovetail-shaped structures.

[0034] Reliable interlocking: The dovetail groove 21 and dovetail tenon 22 are used to form a mechanical interlocking structure, which can effectively resist the separation forces in the horizontal and vertical directions (such as the lifting force and horizontal shear force when a vehicle passes over the joint), prevent the slabs from misaligning, separating or arching, and ensure the smoothness and overall stability of the road surface.

[0035] Easy installation guidance: The dovetail shape provides natural guidance and positioning during installation, facilitating quick and accurate docking and improving construction efficiency.

[0036] Increase the contact area: The dovetail-shaped contact surface has a larger direct contact area than a flat surface, which helps to improve stress transmission.

[0037] In this embodiment, the surface of the dovetail tenon 22 is provided with an elastic sealing strip 23, and the inner wall of the dovetail groove 21 is coated with a waterproof adhesive layer.

[0038] Double sealing for waterproofing and seepage prevention: An elastic sealing strip 23 is set on the surface of the dovetail tenon 22, and a waterproof adhesive layer is coated on the inner wall of the dovetail groove 21. The two fit tightly when they interlock. This double sealing measure can effectively prevent surface water and rainwater from seeping into the interior of the slab 10 or the foundation layer through the joint, avoiding water damage (such as frost heave, foundation softening, and steel corrosion), and significantly improving the durability and stability of the road. The elastic sealing strip 23 can also adapt to the slight deformation of the slab 10 and maintain the effectiveness of the seal.

[0039] In this embodiment, the reinforcing layer 30 is composed of crisscrossing steel mesh and parallel distributed glass fiber reinforcements, with the glass fiber reinforcements located in the longitudinal center of the plate 10.

[0040] Composite reinforcement and synergistic effect: The reinforcing layer 30 adopts a combination of steel mesh (providing the main tensile strength and overall restraint) and glass fiber reinforcement (corrosion resistant, lightweight and high strength).

[0041] Crack resistance optimization: The glass fiber reinforcement is longitudinally arranged in the middle of the slab 10 (the area with large bending moment and easy cracking), which can effectively control the generation and development of longitudinal cracks, overcome the problem that traditional steel reinforcement is prone to longitudinal cracking in the middle of the slab, and especially enhance the crack resistance of the slab 10 under temperature stress and shrinkage stress.

[0042] Improved durability: The glass fiber reinforcement does not rust, avoiding the problem of concrete cracking and spalling caused by the expansion of the steel reinforcement due to rust, further improving the long-term durability of the reinforcement layer 30 and the plate 10.

[0043] In this embodiment, the support ribs 40 are trapezoidal hollow structures, and are distributed at equal intervals along the length of the plate 10.

[0044] Lightweight and high-rigidity design: The support rib 40 adopts a trapezoidal hollow structure, which maximizes the reduction of the self-weight of the plate 10 while ensuring sufficient rigidity and load-bearing capacity (trapezoidal cross section has good bending resistance), making it easier to transport and install and reducing the load on the foundation.

[0045] Equally spaced load distribution optimizes stress distribution: The load is evenly distributed along the length of the plate 10, which allows the load to be transferred to the lower foundation evenly and efficiently, avoiding excessive local stress and improving the overall load-bearing capacity and service life of the plate 10; the hollow structure also facilitates the passage of pipelines or the filling of lightweight materials.

[0046] In this embodiment, the anti-slip layer includes diamond-shaped embossed patterns on the surface of the plate 10 and a polyurethane wear-resistant coating covering the embossed surface.

[0047] Multi-layered anti-slip and wear-resistant: The diamond-shaped embossed pattern provides macroscopic texture, which significantly improves the road surface friction coefficient by increasing the unevenness of the contact surface, especially under wet conditions.

[0048] Enhanced wear resistance: The applied polyurethane wear-resistant coating forms a high-strength, wear-resistant surface layer, protecting the diamond-patterned texture from wear and significantly extending the lifespan of the anti-slip effect. The polyurethane material also possesses good elasticity and weather resistance.

[0049] Comprehensive protection: This dual structure (physical texture + chemical coating) works synergistically to ensure that the road slab maintains excellent anti-skid safety and wear resistance throughout its entire life cycle.

[0050] In this embodiment, the plate 10 is provided with lifting holes 50 at its four corners.

[0051] Convenient construction: Lifting holes 50 are set at the four corners of the panel 10, providing standardized stress points for lifting, transportation and installation, which greatly facilitates construction operations, improves installation efficiency and positioning accuracy, and reduces damage to the edges of the panel 10.

[0052] In this embodiment, a stainless steel internally threaded sleeve 60 is pre-embedded in the lifting hole 50, and the internally threaded sleeve 60 is connected to the lifting bolt 70.

[0053] Reliable and durable connection: A stainless steel internal threaded sleeve 60 is pre-embedded in the lifting hole 50, which allows for a firm and reliable connection with the lifting tool through bolts during lifting.

[0054] Protecting concrete: Prevents wire ropes or hooks from directly rubbing and squeezing the concrete hole wall during hoisting, effectively preventing the concrete around the hoisting hole 50 from cracking and breaking.

[0055] Reusable: The stainless steel material is corrosion resistant, high in strength, and has a long service life, ensuring that the lifting points are reliable and durable throughout the entire life cycle of the plate (including possible replacement lifting) and can withstand large lifting forces.

[0056] In this embodiment, a rubber vibration isolation pad 11 is attached to the bottom surface of the plate 10.

[0057] Vibration reduction and noise reduction: The rubber vibration isolation pad 11 is attached to the bottom surface of the plate 10, which can effectively absorb the vibration and noise generated by the impact of vehicle load, improve driving comfort and reduce noise pollution to the surrounding environment.

[0058] Stress buffering: The rigid contact between the buffer plate 10 and the base layer reduces stress concentration, protects the base layer from being crushed, and also reduces the impact stress on the plate 10 itself, which helps to extend the service life of the road slab and the base.

[0059] Fine-tuning and leveling: The elastic rubber pad can also compensate for minor unevenness in the base layer.

[0060] In this embodiment, the plate 10 is provided with a metal buckle 12, which can be vertically rotated through the dovetail groove 21 and the dovetail tenon 22; the surface of the metal buckle 12 is covered with an engineering plastic layer.

[0061] Connection reinforcement and anti-detachment: The metal latch 12 can rotate vertically through the interlocked dovetail groove 21 and dovetail tenon 22 to form an additional, forced mechanical lock, which greatly enhances the anti-separation ability of adjacent plates 10 in the vertical direction (prevents upward arching). It is especially suitable for road sections with heavy loads and large impact loads or occasions that require extremely high connection reliability, providing double connection protection.

[0062] Corrosion and wear resistance: The surface of the metal latch 12 is covered with an engineering plastic layer, which effectively prevents metal corrosion and avoids direct hard friction between the metal latch 12 and concrete (especially UHPC), protecting the integrity of the latch itself and the concrete hole wall.

[0063] Easy to operate: The vertical rotation method makes installation relatively simple.

[0064] Summary of Beneficial Effects: The road slab based on high-performance concrete provided by this utility model, by using ultra-high performance concrete (UHPC) as the main material, and combining it with an optimized connection structure 20 (with a sealed dovetail tenon 22 groove), a composite reinforced strengthening layer 30 (steel mesh + glass fiber reinforcement), lightweight and high-strength support ribs 40 (trapezoidal hollow), a highly efficient and durable anti-slip layer (diamond pattern + polyurethane coating), a convenient hoisting structure (pre-embedded threaded sleeve), shock-absorbing isolation pads, and optional reinforcing locks, integrates the following significant beneficial effects:

[0065] 1. Ultra-high strength and toughness: The UHPC matrix and internal reinforcement structure endow the plate with excellent compressive strength, flexural strength and toughness, and excellent crack resistance.

[0066] 2. Excellent durability: The material's high density and corrosion resistance, combined with double sealing measures at the joints, effectively resist water damage, freeze-thaw cycles, chemical corrosion, and steel / fiber corrosion, resulting in a long service life.

[0067] 3. Lightweight: The high strength of UHPC allows for a reduction in cross-sectional thickness. Combined with the hollow support ribs 40 design, the weight of the panel 10 is significantly reduced, facilitating transportation and installation.

[0068] 4. Reliable Connection and Integrity: The dovetail tenon design with 22 grooves provides reliable mechanical interlocking, combined with optional locking clips, effectively resisting horizontal and vertical displacement and ensuring a smooth and stable road surface. Double sealing ensures waterproof joints.

[0069] 5. Superior load-bearing capacity: The 40-rib design significantly improves bending stiffness, while the 30-layer reinforcement provides overall tensile strength, ensuring uniform and efficient load transfer.

[0070] 6. Excellent anti-slip and wear resistance: The combination of diamond-patterned texture and polyurethane coating provides a durable high coefficient of friction surface and excellent wear resistance, ensuring driving safety.

[0071] 7. Convenient construction and installation: The standardized hoisting hole design (including pre-embedded sleeves) ensures safe, efficient, and undamaged hoisting of the slab.

[0072] 8. Shock absorption and noise reduction: The bottom rubber vibration isolation pad 11 effectively absorbs impact, reduces noise, improves comfort, and protects the foundation.

[0073] Highly adaptable: It is especially suitable for high-grade roads, heavy-duty traffic roads, urban expressways, bridge pavement, intersections, toll stations, airport runways, road projects requiring rapid construction or repair, and occasions with high requirements for noise and durability.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A road slab based on high-performance concrete, characterized in that, It includes a rectangular plate made of ultra-high performance concrete (UHPC); the plate has a connecting structure on its four sides, a reinforcing layer embedded inside the plate, a supporting rib at the bottom of the plate, and an anti-slip layer on the surface of the plate.

2. The road slab based on high-performance concrete as described in claim 1, characterized in that, The connection structure includes a dovetail groove or a dovetail tenon that matches the dovetail groove, wherein the dovetail tenon and the dovetail groove interlock; the cross sections of the dovetail tenon and the dovetail groove are complementary dovetail-shaped structures.

3. The road slab based on high-performance concrete as described in claim 2, characterized in that, The surface of the dovetail tenon is provided with an elastic sealing strip, and the inner wall of the dovetail groove is coated with a waterproof adhesive layer.

4. The road slab based on high-performance concrete as described in claim 3, characterized in that, The reinforcing layer consists of crisscrossing steel mesh and parallel glass fiber reinforcement bars, with the glass fiber reinforcement bars located in the longitudinal center of the plate.

5. The road slab based on high-performance concrete as described in claim 4, characterized in that, The supporting ribs are trapezoidal hollow structures and are evenly distributed along the length of the plate.

6. The road slab based on high-performance concrete as described in claim 5, characterized in that, The anti-slip layer includes diamond-shaped embossed patterns on the surface of the plate and a polyurethane wear-resistant coating covering the embossed surface.

7. The road slab based on high-performance concrete as described in any one of claims 1 to 6, characterized in that, The plate has lifting holes at its four corners.

8. The road slab based on high-performance concrete as described in claim 7, characterized in that, A stainless steel internally threaded sleeve is pre-embedded in the lifting hole, and the internally threaded sleeve is bolted to the lifting tool.

9. The road slab based on high-performance concrete as described in any one of claims 1 to 6, characterized in that, The bottom surface of the plate is covered with rubber vibration damping pads.

10. The road slab based on high-performance concrete as described in any one of claims 2 to 6, characterized in that, The plate is provided with a metal buckle, which can be rotated vertically through the dovetail groove and the dovetail tenon; the surface of the metal buckle is covered with an engineering plastic layer.

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