An anti-cracking structure for asphalt road

Abstract

The utility model relates to the field of asphalt roads, in particular to an anti-cracking structure for asphalt roads; comprising: a base layer; a subbase layer, the subbase layer is arranged on the upper surface of the base layer; a coarse crushed stone layer, the coarse crushed stone layer is arranged on the upper surface of the subbase layer; a gravel base layer, the gravel base layer is arranged on the upper surface of the coarse crushed stone layer; an asphalt layer, the asphalt layer is arranged on the upper surface of the gravel base layer; wherein the base layer comprises: a grid support frame, the grid support frame is arranged in the base layer, and the grid support frame comprises: an upper grid layer and a lower grid layer, and a plurality of vertical support rods and cross support rods are arranged between the upper grid layer and the lower grid layer; the utility model arranges cross support rods, so that the structure of the grid support frame can bear a larger load and is not easy to deform, so that the base layer itself has a stronger load-bearing capacity, and has strong toughness, will not break or separate, etc., and can effectively prevent road cracking.

Description

Technical Field

[0001] The utility model relates to the field of asphalt roads, in particular to an anti-cracking structure of an asphalt road. Background Art

[0002] Asphalt road is a common road paving material, also known as asphalt road or black road surface. It is composed of asphalt mixture (also known as asphalt concrete) and is a type of pavement commonly used in road construction.

[0003] The main component of asphalt roads is asphalt mixture, which is usually composed of asphalt (a binder) and mineral aggregates (such as gravel and sand). Asphalt flows at high temperatures and can bind and fix the mineral aggregates to form a solid road surface.

[0004] Cracks in asphalt roads occur because the soil is loose or the base layer is broken due to excessive load.

[0005] Therefore, there is an urgent need to provide an improved technical solution to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide an anti-cracking structure for an asphalt road in view of the above-mentioned existing technical problems, so as to achieve the technical effect of being able to withstand a greater load and not prone to cracks.

[0007] In view of this, the utility model provides an anti-cracking structure for an asphalt road, which is characterized by comprising:

[0008] Base layer;

[0009] A subbase layer, the subbase layer being arranged on the upper surface of the base layer;

[0010] a coarse crushed stone layer, the coarse crushed stone layer being arranged on the upper surface of the subbase;

[0011] a gravel base layer, the gravel base layer being arranged on the upper surface of the coarse crushed stone layer;

[0012] an asphalt layer, the asphalt layer being disposed on the upper surface of the gravel base layer;

[0013] Among them, the basic layer includes:

[0014] A grid support frame, the grid support frame is arranged in the base layer, and the grid support frame includes:

[0015] An upper grid layer and a lower grid layer, and a plurality of vertical support rods and cross support rods are arranged between the upper grid layer and the lower grid layer.

[0016] Furthermore, the middle height of the grid support frame is higher than the heights on both sides.

[0017] Furthermore, it also includes:

[0018] A plurality of fixed insertion rods are fixedly arranged on the lower side of the grid support frame and penetrate the foundation layer to the ground.

[0019] Furthermore, it also includes:

[0020] A drainage pipe, one end of which is arranged in the gravel base layer, and the other end of which penetrates the side of the gravel base layer to the air.

[0021] Furthermore, it also includes:

[0022] Shoulders: Shoulders are set on both sides of the asphalt layer.

[0023] Furthermore, the grid support frame is made by binding threaded steel bars of different lengths.

[0024] The beneficial effects of the utility model are:

[0025] 1. The utility model arranges cross support rods so that the structure of the grid support frame can bear a larger load and is not easily deformed. The grid support frame is arranged so that the base layer itself has a stronger load-bearing capacity and has strong toughness, and will not break or separate, thereby effectively preventing road cracking.

[0026] 2. The fixed rods of the utility model are arranged at each node position of the lower grid layer and inserted into the ground, which can enhance the stability of the foundation layer on the surface. The fixed rods can be welded under the lower grid layer, and the fixed rods can fix the soil to prevent large-scale landslides. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the grid support frame of the utility model;

[0029] Figure 3 for Figure 1 Schematic diagram of the structure of the middle A area;

[0030] Figure 4 This is a schematic diagram of the structure of the utility model in which the middle height is higher than the two sides.

[0031] The symbols in the figure are:

[0032] 1. Foundation layer; 2. Subbase layer; 3. Coarse crushed stone layer; 4. Gravel base layer; 5. Asphalt layer; 6. Grid support frame; 7. Upper grid layer; 8. Lower grid layer; 9. Vertical support rods; 10. Cross support rods; 11. Fixed rods; 12. Drain pipes; 13. Shoulders. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0034] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] This embodiment provides an anti-cracking structure for an asphalt road, comprising:

[0037] Base layer 1;

[0038] A base layer 2, the base layer 2 is arranged on the upper surface of the base layer 1;

[0039] A coarse crushed stone layer 3, wherein the coarse crushed stone layer 3 is arranged on the upper surface of the base layer 2;

[0040] A gravel base layer 4, wherein the gravel base layer 4 is arranged on the upper surface of the coarse crushed stone layer 3;

[0041] An asphalt layer 5, the asphalt layer 5 is arranged on the upper surface of the gravel base layer 4;

[0042] Among them, the base layer 1 includes:

[0043] A grid support frame 6, the grid support frame 6 is arranged in the base layer 1, and the grid support frame 6 includes:

[0044] An upper grid layer 7 and a lower grid layer 8 are provided, and a plurality of vertical support rods 9 and cross support rods 10 are provided between the upper grid layer 7 and the lower grid layer 8.

[0045] The base layer 1 is made of crushed stone and concrete, and C30 concrete can be selected; the subbase layer 2 is set on the top of the base layer 1, and the material of the subbase layer 2 can be crushed stone, concrete or recyclable materials; the coarse crushed stone layer 3 is a rough base layer 1, which helps to improve the bearing capacity and stability of the road surface. It can use larger stones, usually with a thickness of about 5 to 10 cm; the gravel base layer 4 has the following main roles and functions in the asphalt road structure:

[0046] Support and distribute loads: The gravel base layer 4 can effectively support the pressure from traffic loads and evenly transfer these loads to the underlying base layer 1, reducing the direct impact on the asphalt concrete layer, thereby extending the service life of the road surface.

[0047] Providing drainage: The loose structure of the gravel base layer 4 is conducive to drainage, which can quickly drain rainwater and groundwater under the road surface, preventing moisture accumulation from causing softening of the roadbed and damage to the asphalt layer 5.

[0048] Reduction of reflective cracking: By providing a uniform supporting layer, the gravel base layer 4 helps to reduce stress and deformation beneath the asphalt layer 5 on the road surface, thereby reducing or delaying the occurrence of reflective cracking.

[0049] The selection and construction of the gravel base 4 should consider the following key factors:

[0050] Gravel selection: Gravel with a larger diameter is usually used, such as stones with a diameter of 20 mm to 60 mm. These gravels should meet national or regional standards to ensure their strength and durability.

[0051] Compactness: The gravel base 4 should be properly compacted to ensure stability and load-bearing capacity. Compacting can be done by mechanical rollers or vibrating rollers to ensure that the required compactness is achieved.

[0052] Thickness: The thickness of the gravel base 4 generally ranges from 10 cm to 30 cm, and the specific thickness depends on factors such as geological conditions, design requirements and expected traffic loads.

[0053] When constructing the gravel base 4, the following key points need to be noted:

[0054] Even laying: Gravel should be laid evenly on the base layer 1 to ensure uniformity and consistency of the entire road surface base.

[0055] Compaction control: The compaction process must be well controlled during construction to avoid unevenness of the base layer and structural instability caused by excessive or insufficient compaction.

[0056] Flatness: The surface of the gravel base 4 should be flat and meet the flatness and slope requirements of the design so that the asphalt concrete layer can be laid smoothly.

[0057] Advantages: Gravel base 4 can effectively improve the bearing capacity and durability of asphalt roads, while providing good drainage performance and extending the service life of the road surface.

[0058] Limitations: Requires appropriate thickness and correct construction techniques, otherwise the stability and durability of the pavement may be affected.

[0059] The asphalt layer 5 is a key component of the asphalt pavement structure. It is located above the gravel base layer 4 and is the surface layer that is in direct contact with the vehicle. The asphalt layer 5 can bear the weight and movement of the vehicle, and disperse and transfer the load to the base and gravel base layer 4 below. The smooth asphalt pavement provides good driving comfort and vehicle handling, reducing the discomfort to the driver and passengers. The surface texture of the asphalt layer 5 and the characteristics of the material itself can effectively provide good skid resistance and reduce the risk of accidents on rainy days and slippery roads. As a surface layer, the asphalt layer 5 can protect the base and gravel layer from climate change, water erosion and mechanical wear.

[0060] Asphalt concrete is usually composed of the following main materials:

[0061] Aggregates: such as crushed stone, sand and filler, are graded to achieve the required density and strength.

[0062] Asphalt binder: Made of petroleum asphalt (petroleum tar) and additives, it is responsible for binding the aggregate together and providing elasticity and durability.

[0063] Additives: such as polymer modifiers or rubber powder, used to improve the elastic modulus, anti-aging properties and adhesion of asphalt concrete.

[0064] A grid support frame 6 is added to the foundation layer 1. The grid support frame 6 is arranged in the foundation layer 1. The grid support frame 6 includes an upper grid layer 7 and a lower grid layer 8. The material of the grid support frame is usually formed by binding threaded steel bars, or it can be welded as a whole. A plurality of arrays of squares are formed on the upper grid layer 7; a plurality of vertical support rods 9 are passed between the upper grid layer 7 and the lower grid layer 8. There are a plurality of crossed nodes on the upper grid layer 7 or the lower grid layer 8. The upper grid layer 7 and the lower grid layer 8 at the same upper and lower node positions are connected by the vertical support rods 9. At four adjacent nodes (two nodes each at the upper and lower ends), crossed cross support rods 10 are arranged at the four nodes. By arranging the cross support rods 10, the structure of the grid support frame 6 can withstand a larger load and is not easily deformed. In addition, the grid support frame 6 is arranged so that the foundation layer 1 itself has a stronger load-bearing capacity and has strong toughness. It will not break or separate, and can effectively prevent road cracking.

[0065] Embodiment 2:

[0066] This embodiment provides an anti-cracking structure for an asphalt road, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0067] The middle height of the grid support frame 6 is higher than the heights on both sides.

[0068] Since the middle of the road needs to be set high in the middle and low on both sides, the advantages of such a road are:

[0069] The middle of the road is higher than the sides to help rainwater or melted snow flow smoothly into the roadside drainage system or side ditches. This design is called "cross slope" or "cross elevation" and ensures that water does not accumulate on the road surface, reducing the risk of ponding and flooding.

[0070] When water accumulates on the surface of a road, it can cause damage to the pavement or create structural weak points. By making the middle of the road higher than the sides, the structural integrity of the road can be better protected and the life of the road can be extended.

[0071] The lateral slope helps improve the driver's vision and control ability. On rainy days or slippery roads, water can flow more quickly from the center of the road to the drainage system on both sides, reducing water vapor splashing and improving the driver's visual clarity and reaction time.

[0072] In cold regions, transverse slopes help prevent rainwater or melted snow from freezing on the road surface because water flows more easily toward the roadside drainage system, reducing the possibility of ice and improving road safety.

[0073] Therefore, it is preferred to set the grid support frame 6 to a shape in which the middle height is higher than the heights on both sides, so as to more conveniently and intuitively plasticize the base layer 1, assist in the production of the base layer 1, and make the size more precise.

[0074] Also includes:

[0075] A plurality of fixed insertion rods 11 are fixedly arranged on the lower side of the grid support frame 6 and penetrate the base layer 1 to the ground.

[0076] The fixed rods 11 are arranged at various node positions of the lower grid layer 8 and inserted into the ground, which can enhance the stability of the foundation layer 1 on the surface. The fixed rods 11 can be welded under the lower grid layer 8, and the fixed rods 11 can fix the soil to prevent large-scale landslides.

[0077] Furthermore, more fixing rods evenly distributed around the circumference are added to the side of the fixing rod 11 to make the soil fixing effect stronger.

[0078] Embodiment 3:

[0079] This embodiment provides an anti-cracking structure for an asphalt road, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0080] Also includes:

[0081] A drainage pipe 12, one end of which is arranged in the gravel base layer 4, and the other end of which penetrates the side of the gravel base layer 4 to the air.

[0082] One end of the drainage pipe 12 is inserted into the gravel base layer 4, and a plurality of drainage pipes 12 are provided. The gravel base layer 4 is composed of loose stones. This structure is conducive to the rapid drainage of rainwater and groundwater, preventing moisture from accumulating under the road surface, thereby reducing the risk of softening the roadbed and damage to the asphalt layer 5. By setting the drainage pipe 12, the accumulated water can be discharged, and preferentially discharged to both sides of the road.

[0083] Also includes:

[0084] The road shoulders 13 are arranged on both sides of the asphalt layer 5 .

[0085] The shoulder 13 is the edge portion along the sides of the road, usually parallel to the road surface, and has the following functions:

[0086] The shoulder 13, as the edge of the road, provides auxiliary passage space for vehicles in emergency situations or when they need to stop. The driver can move the vehicle to the shoulder 13 to free up the main road surface or stop; the shoulder 13 can be used as part of the road slope to help stabilize and protect the road slope from erosion and damage.

[0087] The grid support frame 6 is made by binding threaded steel bars of different lengths.

[0088] Threaded steel bars of the same length can be prefabricated and cut into pieces, and then tied and connected to form a grid support frame 6, which facilitates transportation and storage of the grid support frame 6.

[0089] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the inspiration of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which belong to the scope of protection of the present application.

Claims

1. An anti-cracking structure for an asphalt road, characterized in that: include: Base layer (1); A base layer (2), the base layer (2) being arranged on the upper surface of the base layer (1); a coarse crushed stone layer (3), the coarse crushed stone layer (3) being arranged on the upper surface of the base layer (2); A gravel base layer (4), the gravel base layer (4) being arranged on the upper surface of the coarse crushed stone layer (3); An asphalt layer (5), the asphalt layer (5) being arranged on the upper surface of the gravel base layer (4); The base layer (1) includes: A grid support frame (6), the grid support frame (6) is arranged in the base layer (1), and the grid support frame (6) comprises: An upper grid layer (7) and a lower grid layer (8), and a plurality of vertical support rods (9) and cross support rods (10) are arranged between the upper grid layer (7) and the lower grid layer (8).

2. The anti-cracking structure of an asphalt road according to claim 1, characterized in that: The middle height of the grid support frame (6) is higher than the heights of the two sides.

3. The anti-cracking structure of an asphalt road according to claim 1, characterized in that: Also includes: A plurality of fixed insertion rods (11) are fixedly arranged on the lower side of the grid support frame (6) and penetrate the base layer (1) to the ground.

4. The anti-cracking structure of an asphalt road according to claim 1, characterized in that: Also includes: A drainage pipe (12), one end of which is arranged in the gravel base layer (4), and the other end of which penetrates the side of the gravel base layer (4) to the air.

5. The anti-cracking structure of an asphalt road according to claim 1, characterized in that: Also includes: Road shoulders (13), the road shoulders (13) are arranged on both sides of the asphalt layer (5).

6. The anti-cracking structure of an asphalt road according to claim 1, characterized in that: The grid support frame (6) is made by binding threaded steel bars of different lengths.

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