Pre-tensioning plate structure for wear-resisting and noise-reducing road
By adopting a wear-resistant and noise-reducing road structure on cement concrete pavement, combining steel strands and transverse steel bars, and using wear-resistant concrete and longitudinal grooves, the wear-resistant concrete pavement is solved, and the problem of insufficient wear resistance and noise on cement concrete pavement is achieved. Better anti-wear and noise reduction effects.
Patent Information
- Application Number
- CN202421486287.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing cement concrete pavement lacks wear resistance, resulting in wear and tear diseases such as peeling, numbing, and exposed bones. The opening of transverse grooves increases noise, affecting driving safety and comfort.
The structure of the first-tension plate for wear-resistant and noise-reducing roads includes pouring the wear-resistant layer on the first-tension plate for roads and opening longitudinal inverted trapezoidal grooves, combining steel strands and transverse steel bars, applying prestress to the steel strands, and lateral steel bar layout In the middle of the road-fired plate, the wear-resistant layer uses granite or basalt coarse aggregate and machine sand, and the longitudinal grooves are distributed on the wear-resistant layer.
It improves the wear resistance of the road surface, reduces noise, enhances the anti-slip coefficient, ensures driving safety and comfort, and at the same time enhances the load-bearing capacity of the road surface, avoiding wear and tear diseases.
Smart Images
Figure CN222182945U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pre-tensioned board structure, and more specifically, to a pre-tensioned board structure for a wear-resistant and noise-reducing road. Background Art
[0002] Cement concrete pavement has the advantages of high strength, stability, long service life and low maintenance cost, so cement concrete pavement is used in tunnels and heavy-load sections of highways. However, with the development of economy and transportation, the traffic is busy and heavy-load traffic is increasing. Many cement concrete pavements have serious wear and tear diseases such as peeling, pockmarks, and exposed bones, which affect the normal use of the pavement. The reason is that the existing cement concrete road panels have poor wear resistance.
[0003] Furthermore, for existing cement concrete pavements, in order to ensure sufficient friction on the pavement, transverse grooves are opened on the cement concrete pavement to ensure sufficient friction between the pavement and the vehicle tires to ensure driving safety. However, the opening of the transverse grooves will greatly increase the noise during vehicle driving, which is not conducive to the noise reduction requirements of the road. Summary of the invention
[0004] In order to overcome the disadvantages of the above technical problems, the utility model provides a wear-resistant and noise-reducing pre-tensioned plate structure for roads.
[0005] The utility model discloses a wear-resistant and noise-reducing road pre-tensioned plate structure, comprising a road pre-tensioned plate for being arranged on a roadbed base layer, the road pre-tensioned plate being composed of ordinary concrete and steel strands and transverse steel bars cast in the ordinary concrete, the steel strands being arranged along the longitudinal direction of the road pre-tensioned plate and having tensile prestress applied thereto, the transverse steel bars being arranged along the transverse direction of the road pre-tensioned plate, the steel strands and the transverse steel bars being both located in the middle of the road pre-tensioned plate in the thickness direction; the utility model is characterized in that a wear-resistant layer is cast on the upper surface of the road pre-tensioned plate, a longitudinal groove is provided on the upper surface of the wear-resistant layer in accordance with the longitudinal direction of the road pre-tensioned plate, and the longitudinal grooves are evenly distributed along the transverse direction of the wear-resistant layer.
[0006] The utility model discloses a pre-tensioned slab structure for wear-resistant and noise-reducing roads, wherein the wear-resistant layer is formed by casting and solidifying wear-resistant concrete, wherein the material of the coarse aggregate in the wear-resistant concrete is granite or basalt, and the material of the fine aggregate in the wear-resistant concrete is machine-made sand; and the maximum particle size of the coarse aggregate does not exceed 1 cm.
[0007] The utility model discloses a wear-resistant and noise-reducing road pre-tensioned plate structure, wherein the cross-section of the longitudinal groove is an inverted trapezoidal shape, the upper bottom width of the inverted trapezoidal longitudinal groove is 5mm-7mm, the lower bottom width is 3mm-5mm, the height is 6mm-8mm, and the net spacing between two adjacent longitudinal grooves is 2.5cm-3cm.
[0008] The utility model discloses a pre-tensioned slab structure for wear-resistant and noise-reducing roads, wherein the thickness of the wear-resistant layer is 2.5 cm to 4.0 cm, and the grade of the wear-resistant concrete used in the wear-resistant layer is 40 MPa to 50 MPa.
[0009] The utility model discloses a wear-resistant and noise-reducing road pre-tensioned plate structure, wherein the thickness of the road pre-tensioned plate is 14 cm to 20 cm, the strength of ordinary concrete used in the road pre-tensioned plate is 35 MPa to 40 MPa, and the strength grade of the steel strand is 1860 MPa.
[0010] The utility model discloses a wear-resistant and noise-reducing road pre-tensioned plate structure, wherein the transverse reinforcements are secondary reinforcements with a diameter of 15 mm to 18 mm, the spacing of the transverse reinforcements in the longitudinal direction is 50 cm to 70 cm, and the transverse reinforcements are arranged on the upper part of the steel strands.
[0011] The beneficial effects of the utility model are as follows: the wear-resistant and noise-reducing road pre-tensioned plate structure of the utility model is composed of a road pre-tensioned plate and a wear-resistant layer arranged on the road pre-tensioned plate, the steel strands exert compressive stress on the concrete in the road pre-tensioned plate, and the compressed road pre-tensioned plate can offset the tensile stress generated by the vehicle load, so that the formed concrete pavement has good bearing capacity; by arranging the wear-resistant layer on the road pre-tensioned plate, the wear resistance of the road surface is effectively increased, and the occurrence of peeling, pockmarks, exposed bones and other wear diseases on the concrete road surface is avoided, and at the same time, by providing longitudinal grooves on the wear-resistant layer, compared with the existing transverse grooves, while ensuring that the road surface has a good anti-skid coefficient, the noise between the tires and the ground during the driving of the car is effectively reduced.
[0012] Furthermore, the coarse aggregate in the wear-resistant concrete constituting the wear-resistant layer is made of relatively solid granite or basalt, which increases the wear value of the aggregate, and the fine aggregate is made of machine-made sand, which has a rough and angular surface, which increases the bonding force with the colloid and ensures the wear resistance of the wear-resistant layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the structure of the wear-resistant and noise-reducing pre-tensioned plate structure for roads of the utility model;
[0014] Figure 2 for Figure 1 A partial enlarged view of area A.
[0015] In the figure: 1 wear-resistant layer, 2 pre-stressed plate for road, 3 wear-resistant concrete, 4 ordinary concrete, 5 steel strands, 6 transverse steel bars, 7 roadbed base, 8 longitudinal grooves, 9 coarse aggregate, 10 fine aggregate. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] like Figure 1 As shown, a schematic diagram of the structure of the wear-resistant and noise-reducing pre-tensioned plate structure for roads of the utility model is given. Figure 2 Given Figure 1 The partial enlarged view of the area A in the middle shows that the road pre-tensioned plate structure of the utility model is composed of a road pre-tensioned plate 2 and a wear-resistant layer 1. The wear-resistant layer 1 is arranged on the upper surface of the road pre-tensioned plate 2. When in use, the road pre-tensioned plate 2 is used to be laid on the roadbed base 7. The road pre-tensioned plate 2 shown is composed of ordinary concrete 4 and steel strands 5 and transverse steel bars 6 cast therein. The steel strands 5 are evenly spaced along the transverse direction of the road pre-tensioned plate 2 (i.e. the width direction of the road), and the length direction of the steel strands 5 is consistent with the longitudinal direction of the road pre-tensioned plate 2 (i.e. the driving direction of the road); the transverse steel bars 6 are evenly arranged along the longitudinal direction of the road pre-tensioned plate 2, and the length direction of the transverse steel bars 6 is consistent with the transverse direction of the road pre-tensioned plate 2. The steel strands 5 and the transverse steel bars 6 are both arranged in the middle of the road pre-tensioned plate 2 in the thickness direction.
[0018] During the prefabrication of the road pre-tensioned slab 2, tensile stress will be applied to the steel strands 5. After the poured ordinary concrete 4 is finally set, the tensioning of the steel strands 5 will be cancelled. At this time, the steel strands 5 will apply compressive stress to the ordinary concrete 4, so that the road pre-tensioned slab 2 is in a compressed state. After the road pre-tensioned slab 2 is laid on the roadbed base 7, during the driving of vehicles, the vehicle load will apply tensile stress to the road pre-tensioned slab 2. The compressive stress in the compressed road pre-tensioned slab 2 will offset the tensile stress generated by the vehicle load, so that the road pre-tensioned slab 2 has a good bearing capacity and is strong and durable.
[0019] The wear-resistant layer 1 shown is laid on the upper surface of the pre-tensioned road slab 2, which is cast by wear-resistant concrete 3. The wear-resistant layer 1 formed by the wear-resistant concrete 3 has excellent wear resistance and can effectively avoid the occurrence of wear and tear diseases such as peeling, pockmarks, and exposed bones on the road surface. Longitudinal grooves 8 are opened on the upper surface of the wear-resistant layer 1. The longitudinal grooves 8 are evenly distributed along the transverse direction of the wear-resistant layer 1, and the length direction of the longitudinal grooves 8 is consistent with the longitudinal direction of the wear-resistant layer 1 (i.e., the driving direction). Since the longitudinal grooves 8 are evenly opened on the wear-resistant layer 1, the surface of the wear-resistant layer 1 has a good anti-slip coefficient, ensuring driving safety. In addition, compared with the transverse grooves opened on the existing concrete road surface, the noise generated between the tires and the ground during the driving of the car can be effectively reduced, which is conducive to improving driving comfort.
[0020] like Figure 2 As shown, the cross section of the longitudinal groove 8 is an inverted trapezoidal shape, and the groove is cut on the wear-resistant layer 1 for a period of time when the wear-resistant concrete 3 reaches 40% of the design strength. The upper bottom width of the inverted trapezoidal longitudinal groove 8 is 5mm-7mm, the lower bottom width is 3mm-5mm, the height is 6mm-8mm, and the net spacing between two adjacent longitudinal grooves 8 is 2.5cm-3cm.
[0021] The wear-resistant layer 1 shown in the figure has coarse aggregate 9 and fine aggregate 10 evenly distributed, the coarse aggregate 9 is made of granite or basalt, the fine aggregate 10 is made of machine-made sand, and the maximum particle size of the coarse aggregate 9 does not exceed 1 cm. The coarse aggregate 9 formed by granite or basalt is relatively strong, which increases the wear value of the aggregate, and the fine aggregate is made of machine-made sand, which has a rough surface and many edges and corners, and increases the binding force with the colloid.
[0022] The thickness of the wear-resistant layer 1 is 2.5 cm to 4.0 cm, and the wear-resistant concrete grade used in the wear-resistant layer 1 is 40 MPa to 50 MPa. The thickness of the road pre-tensioned plate 2 is 14 cm to 20 cm, the strength of the ordinary concrete 4 used in the road pre-tensioned plate 2 is 35 MPa to 40 MPa, and the strength grade of the steel strand 5 is 1860 MPa. The transverse steel bars 6 are secondary steel bars with a diameter of 15 mm to 18 mm, and the spacing of the transverse steel bars 6 in the longitudinal direction is 50 cm to 70 cm. The transverse steel bars 6 are arranged on the upper part of the steel strand 5.
[0023] The construction process of the wear-resistant and noise-reducing pre-tensioned road slab structure of the utility model is as follows: first, the pre-tensioned road slab 2 is prefabricated in the factory, and after the pre-tensioned road slab 2 is initially set, the wear-resistant layer 1 is cast on its surface; when the wear-resistant concrete 3 in the wear-resistant layer 1 reaches 40% of the design strength, the longitudinal groove 8 is cut. After the pre-tensioned road slab 2 and the wear-resistant layer 1 are cured, the steel strand 5 is laid out and the steel strand 5 is cut along the end surface of the pre-tensioned road slab 2, and then the pre-tensioned road slab 2 with the wear-resistant layer 1 is transported to the site for laying.
Claims
1. A wear-resistant and noise-reducing road pre-tensioned plate structure, comprising a road pre-tensioned plate (2) for being arranged on a roadbed base (7), the road pre-tensioned plate being composed of ordinary concrete (4) and steel strands (5) and transverse steel bars (6) cast in the ordinary concrete, the steel strands being along the longitudinal direction of the road pre-tensioned plate and being applied with tensile prestress, the transverse steel bars being along the transverse direction of the road pre-tensioned plate, the steel strands and the transverse steel bars being both located in the middle of the road pre-tensioned plate in the thickness direction; characterized in that: A wear-resistant layer (1) is cast on the upper surface of the road pre-tensioned board (2), and longitudinal grooves (8) are provided on the upper surface of the wear-resistant layer in accordance with the longitudinal direction of the road pre-tensioned board, and the longitudinal grooves are evenly distributed along the transverse direction of the wear-resistant layer.
2. The wear-resistant and noise-reducing pre-tensioned slab structure for roads according to claim 1 is characterized by: The wear-resistant layer (1) is formed by pouring and solidifying wear-resistant concrete (3), wherein the coarse aggregate (9) in the wear-resistant concrete is made of granite or basalt, and the fine aggregate (10) in the wear-resistant concrete is made of machine-made sand; the maximum particle size of the coarse aggregate does not exceed 1 cm.
3. The wear-resistant and noise-reducing pre-tensioned slab structure for roads according to claim 1 or 2, characterized in that: The cross section of the longitudinal groove (8) is in the shape of an inverted trapezoid, the upper base width of the inverted trapezoidal longitudinal groove is 5 mm to 7 mm, the lower base width is 3 mm to 5 mm, the height is 6 mm to 8 mm, and the net spacing between two adjacent longitudinal grooves is 2.5 cm to 3 cm.
4. The wear-resistant and noise-reducing pre-tensioned slab structure for roads according to claim 1 or 2, characterized in that: The thickness of the wear-resistant layer (1) is 2.5 cm to 4.0 cm, and the wear-resistant concrete grade used in the wear-resistant layer is 40 MPa to 50 MPa.
5. The wear-resistant and noise-reducing pre-tensioned slab structure for roads according to claim 1 or 2, characterized in that: The thickness of the road prestressed plate (2) is 14 cm to 20 cm, the strength of the ordinary concrete (4) used in the road prestressed plate is 35 MPa to 40 MPa, and the strength grade of the steel strand (5) is 1860 MPa.
6. The wear-resistant and noise-reducing pre-tensioned slab structure for roads according to claim 1 or 2, characterized in that: The transverse steel bars (6) are secondary steel bars with a diameter of 15 mm to 18 mm. The spacing of the transverse steel bars in the longitudinal direction is 50 cm to 70 cm. The transverse steel bars are arranged on the upper part of the steel strand.