A concrete pavement structure

Abstract

The utility model belongs to the technical field of pavement structure, and relates to a concrete pavement structure, including a surface layer, a stabilization layer and a foundation layer arranged in sequence from top to bottom, the surface layer including a first concrete layer and a second concrete layer, the first concrete layer being arranged above the second concrete layer, and the strength grade of the first concrete layer being greater than the strength grade of the second concrete layer. The utility model can make the pavement structure suitable for heavy-loaded high-frequency pavements through the design of the first concrete layer and the second concrete layer of the surface layer; at the same time, by selecting high-grade reinforced concrete for the first concrete layer, the hardness and wear resistance of the road can be improved, and the dust on the road can be reduced; by selecting low-grade reinforced concrete for the second concrete layer, the construction cost can be saved while meeting the basic performance requirements of the road; therefore, the utility model has the advantages of simple structure, easy construction, low cost, good hardness and wear resistance, long service life, excellent pavement performance and engineering practical value.

Description

Technical Field

[0001] The utility model belongs to the technical field of pavement structures, and in particular relates to a concrete pavement structure. Background Art

[0002] Concrete pavement refers to a pavement with cement concrete slab as the surface layer. It refers to a pavement structure composed of cement concrete slab as the surface layer, with base layer and cushion layer underneath, also known as rigid pavement. Materials used for cement concrete surface layer include ordinary concrete, reinforced concrete, continuously reinforced concrete, steel fiber concrete, roller compacted concrete, etc. Among highways, urban roads and airport pavements, the most widely used in my country is the ordinary concrete pavement cast on site. This type of concrete pavement does not have steel bars except in the joint area and local range (edges or corners), also known as plain concrete pavement. Its biggest disadvantage is that its hardness and wear resistance are poor, it is not suitable for heavy load and high frequency use, and the pavement is easy to get dusty, which seriously affects its use. Utility Model Content

[0003] The purpose of the utility model is to solve the defects and shortcomings in the prior art and to design a concrete pavement structure which has the advantages of simple structure, easy construction, good hardness and wear resistance, long service life, excellent pavement performance and engineering practical value.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a concrete pavement structure, including a surface layer, a stabilization layer and a base layer arranged in sequence from top to bottom, the surface layer includes a first concrete layer and a second concrete layer, the first concrete layer is arranged above the second concrete layer, and the strength grade of the first concrete layer is greater than the strength grade of the second concrete layer.

[0005] Preferably, the thickness of the surface layer is greater than the thickness of the stabilizing layer or the base layer.

[0006] Preferably, the thickness of the first concrete layer is smaller than the thickness of the second concrete layer.

[0007] Preferably, the first concrete layer is a 10 cm thick C40 reinforced concrete layer.

[0008] Preferably, the second concrete layer is a 20 cm thick C25 reinforced concrete layer.

[0009] Preferably, the stabilizing layer is a 20 cm thick cement gravel layer, and the deflection value Ls of the stabilizing layer is ≤55.3 (1 / 100 mm).

[0010] Preferably, the base layer is a 20 cm thick 12% lime soil layer, and the deflection value of the base layer is Ls≤290 (1 / 100 mm).

[0011] After adopting the above technical solution, the concrete pavement structure provided by the utility model has the following beneficial effects:

[0012] The utility model can make the pavement structure suitable for heavy-load high-frequency pavement through the design of the first concrete layer and the second concrete layer of the surface layer; at the same time, by selecting high-grade reinforced concrete for the first concrete layer, the hardness and wear resistance of the road can be improved, and the dust on the road can be reduced; by selecting low-grade reinforced concrete for the second concrete layer, the construction cost can be saved while meeting the basic performance requirements of the road. Therefore, the utility model has the advantages of simple structure, easy construction, low cost, good hardness and wear resistance, long service life, and excellent pavement performance and engineering practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a structural schematic diagram of a concrete pavement structure.

[0014] Among them: surface layer 1, stabilization layer 2, foundation layer 3, first concrete layer 4, second concrete layer 5. DETAILED DESCRIPTION

[0015] The present invention is further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0017] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0018] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0019] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0020] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0021] The utility model discloses a concrete pavement structure, such as Figure 1 As shown, it includes a surface layer 1, a stabilization layer 2 and a base layer 3 arranged in sequence from top to bottom, the thickness of the surface layer 1 is greater than the thickness of the stabilization layer 2 or the base layer 3, specifically, the surface layer 1 includes a first concrete layer (4) and a second concrete layer 5, the first concrete layer 4 is arranged above the second concrete layer 5, and the strength grade of the first concrete layer 4 is greater than the strength grade of the second concrete layer 5, and at the same time, the thickness of the first concrete layer 4 is less than the thickness of the second concrete layer 5, further, the first concrete layer 4 is a 10 cm thick C40 reinforced concrete layer, and the second concrete layer 5 is a 20 cm thick C25 reinforced concrete layer, during construction, the lower layer of concrete is poured first, and the upper layer of concrete is poured immediately after the lower layer of concrete reaches the initial setting state.

[0022] The stabilizing layer 2 is a 20 cm thick cement gravel layer, and the deflection value of the stabilizing layer 2 is Ls≤55.3 (1 / 100 mm), and the base layer 3 is a 20 cm thick 12% lime soil layer, and the deflection value of the base layer 3 is Ls≤290 (1 / 100 mm).

[0023] The utility model discloses a concrete pavement structure, which can be suitable for heavy-load high-frequency pavements through the design of a surface layer 1, a first concrete layer 4 and a second concrete layer 5; at the same time, by selecting high-grade reinforced concrete for the first concrete layer 4, the hardness and wear resistance of the road can be improved, and the dust generation of the road can be reduced; by selecting low-grade reinforced concrete for the second concrete layer 5, the construction cost can be saved while meeting the basic performance requirements of the road.

[0024] To sum up, the utility model provides a concrete pavement structure with simple structure, easy construction, low cost, good hardness and wear resistance, long service life, excellent pavement performance and engineering practical value, etc. It has great market value and deserves wide promotion and application.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete pavement structure, characterized in that: The invention comprises a surface layer (1), a stabilization layer (2) and a base layer (3) which are arranged in sequence from top to bottom, wherein the surface layer (1) comprises a first concrete layer (4) and a second concrete layer (5), wherein the first concrete layer (4) is arranged above the second concrete layer (5), and the strength grade of the first concrete layer (4) is greater than the strength grade of the second concrete layer (5).

2. A concrete pavement structure according to claim 1, characterized in that: The thickness of the surface layer (1) is greater than the thickness of the stabilizing layer (2) or the base layer (3).

3. A concrete pavement structure according to claim 1, characterized in that: The thickness of the first concrete layer (4) is smaller than the thickness of the second concrete layer (5).

4. A concrete pavement structure according to claim 1, characterized in that: The first concrete layer (4) is a C40 reinforced concrete layer with a thickness of 10 cm.

5. A concrete pavement structure according to claim 1, characterized in that: The second concrete layer (5) is a 20 cm thick C25 reinforced concrete layer.

6. A concrete pavement structure according to claim 1, characterized in that: The stabilizing layer (2) is a cement gravel layer with a thickness of 20 cm, and the deflection value Ls of the stabilizing layer (2) is ≤55.3 / 100 mm.

7. A concrete pavement structure according to claim 1, characterized in that: The base layer (3) is a 12% lime soil layer with a thickness of 20 cm, and the deflection value Ls of the base layer (3) is ≤290 / 100 mm.

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