Coal gangue roadbed pavement structure of expressway

Abstract

The utility model relates to the technical field of highway roadbed structures, in particular to a highway coal gangue roadbed pavement structure. Comprising a coal gangue mixed subgrade body, a soil base body covering the top of the coal gangue mixed subgrade body, a coal gangue mixed base layer covering the top of the soil base body and an asphalt coal gangue layer covering the top of the coal gangue mixed base layer. The highway can be laid by sequentially arranging the coal gangue mixed roadbed body, the soil base body, the coal gangue mixed base layer and the asphalt coal gangue layer, the structure is simple, and the construction difficulty is reduced; meanwhile, the raw materials are simple, the construction cost is reduced, the coal gangue mixed roadbed body and the coal gangue mixed base layer are used for providing the supporting requirement of the expressway, the construction requirement is met, and therefore the low-cost and high-efficiency construction requirement of the expressway is met.

Description

Technical Field

[0001] The utility model relates to the technical field of highway roadbed structures, in particular to a highway gangue roadbed pavement structure. Background Art

[0002] Cars have become an important means of transportation in human society, and the construction of highways is particularly important. When constructing existing highways, the cost of raw materials is high, and because the road surface needs to meet higher support requirements, the use of stone materials needs to be further increased, further increasing the cost.

[0003] For example, the Chinese utility model patent with publication number CN216514937U provides an easily repairable highway pavement structure, including a slate cushion layer, a sand-mud mixture layer, a road base layer, a cement stabilization layer, an asphalt concrete layer, a buffer layer, a sand and gravel filling layer, a longitudinal mesh, a steel wire reinforcement mesh, a structural leveling layer and a pavement layer laid in sequence, wherein the asphalt concrete layer includes a coarse-grained asphalt concrete layer, a medium-grained asphalt concrete layer and a fine-grained asphalt concrete layer.

[0004] The highway pavement structure is complex and the raw materials used are complicated and the cost of raw materials is high, which increases the difficulty of highway construction and increases the overall construction cost of the highway. It also further reduces the construction efficiency of the highway and cannot meet the actual needs of highway construction. Utility Model Content

[0005] The utility model aims to provide a highway gangue roadbed pavement structure to solve the problem of complex construction structure of existing highways.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A highway gangue roadbed pavement structure comprises a gangue mixed roadbed, a soil base covering the top of the gangue mixed roadbed, a gangue mixed base covering the top of the soil base and an asphalt gangue layer covering the top of the gangue mixed base.

[0008] It is further defined that the asphalt gangue layer includes an asphalt pavement covering the top of the gangue mixed base layer and a gangue powder layer covering the asphalt pavement.

[0009] It is further defined that the thickness of the coal gangue mixed roadbed is 70cm-100cm.

[0010] It is further defined that the thickness of the soil matrix is ​​15cm-30cm.

[0011] It is further defined that the thickness of the coal gangue mixed base layer is 20cm-30cm.

[0012] It is further defined that the thickness of the asphalt pavement is 20cm-60cm.

[0013] It is further defined that the asphalt pavement is connected to the coal gangue mixed base and the soil base respectively.

[0014] It is further defined that the coal gangue mixed road base, soil base, coal gangue mixed base layer, asphalt pavement and coal gangue powder layer constitute an anti-subsidence structure.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model can realize the paving of the expressway by sequentially arranging a gangue mixed roadbed, a soil base, a gangue mixed base and an asphalt gangue layer. The structure is simple and the construction difficulty is reduced. At the same time, the raw materials are simple and the construction cost is reduced. The gangue mixed roadbed and the gangue mixed base are used to provide the support needs of the expressway and meet the construction requirements, thereby meeting the low-cost and high-efficiency construction needs of the expressway.

[0017] 2. The utility model comprises a gangue mixed roadbed, a soil base, a gangue mixed base, an asphalt pavement and a gangue powder layer to form an anti-settlement structure, which further improves the supporting strength of the expressway, avoids settlement and meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;

[0019] Figure 2 It is a side view stereoscopic structural schematic diagram of the utility model;

[0020] Figure 3 It is a front view cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 This is a bottom-up three-dimensional structural schematic diagram of the utility model;

[0022] Figure 5 It is a top view of the three-dimensional structure of the utility model;

[0023] In the figure: 1. Coal gangue mixed roadbed; 2. Soil base; 3. Coal gangue mixed base; 4. Asphalt pavement; 5. Coal gangue powder layer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0025] Example 1

[0026] See also Figure 1-5 The utility model provides an embodiment: a highway gangue roadbed pavement structure, comprising a gangue mixed roadbed body 1, a soil base body 2, a gangue mixed base layer 3 and an asphalt gangue layer laid in sequence from bottom to top, wherein the gangue mixed roadbed body 1 is laid on the top of the existing roadbed.

[0027] The paving of the expressway can be achieved by sequentially arranging a coal gangue mixed roadbed, a soil base, a coal gangue mixed base layer and an asphalt coal gangue layer. The structure is simple and the construction difficulty is reduced. At the same time, the raw materials are simple and the construction cost is reduced. The coal gangue mixed roadbed and the coal gangue mixed base layer are used to provide the support needs of the expressway and meet the construction requirements, thereby meeting the low-cost and high-efficiency construction needs of the expressway.

[0028] Among them, the coal gangue mixed roadbed body 1 and the coal gangue mixed base layer 3 are both mixed by coal gangue and stone, so that the gaps between the coal gangue are filled with stone, and the particle size of the coal gangue in the coal gangue mixed roadbed body 1 is larger than the particle size of the coal gangue in the coal gangue mixed base layer 3. The coal gangue mixed roadbed body 1 and the coal gangue mixed base layer 3 provide the foundation support required for the expressway, meeting the construction requirements of the expressway.

[0029] Coal gangue is a waste generated during coal mining. On the one hand, it has low production costs and reduces raw material costs. On the other hand, it avoids fertilizer pollution, is economical and environmentally friendly. At the same time, it has good water permeability and can reduce the problem of road surface waterlogging. After screening, coal gangue can provide sufficient strength and stability to meet construction requirements.

[0030] To further illustrate, the thickness of the coal gangue mixed roadbed 1 can be selected to be 70cm-100cm, and the thickness of the coal gangue mixed base layer 3 can be selected to be 20cm-30cm.

[0031] By increasing the thickness of the roadbed, the settlement of the expressway can be avoided and the stable and reliable use of the expressway can be ensured.

[0032] The soil matrix 2 is laid between the coal gangue mixed roadbed 1 and the coal gangue mixed base 3. The soil matrix 2 can also provide a stable support effect for the highway pavement, and can also provide a stable shockproof and buffering effect, further improving the construction quality of the highway and meeting the requirements for highway construction and use.

[0033] To further illustrate, the laying thickness of the soil base 2 can be 15 cm-30 cm.

[0034] To further explain, the asphalt gangue layer is a mixture of asphalt and gangue powder, that is, the asphalt gangue layer includes an asphalt pavement 4 and a gangue powder layer 5 .

[0035] By adding coal gangue powder into the asphalt during the paving of the asphalt pavement 4, the coal gangue powder layer 5 is covered on the asphalt pavement 4 and mixed with the asphalt pavement 4, so as to improve the stability of the asphalt coal gangue layer, enhance the adhesion and stability of the asphalt, and further ensure the stability and reliability of the highway pavement.

[0036] The thickness of the asphalt pavement 4 is 20 cm to 60 cm.

[0037] When the asphalt pavement 4 is being laid, the molten asphalt is laid on the coal gangue mixed base layer 3 and then penetrates into the soil matrix 2 along the gaps between the coal gangue and the stone in the coal gangue mixed base layer 3. On the one hand, the overall strength of the coal gangue mixed base layer 3 is increased by mixing the asphalt with the coal gangue. On the other hand, the supporting strength of the coal gangue mixed base layer 3 can also be increased to meet actual construction needs.

[0038] It is further explained that the gangue mixed roadbed 1, the soil base 2, the gangue mixed base 3, the asphalt pavement 4 and the gangue powder layer 5 constitute an anti-settling structure, which further improves the structural stability and reliability of the expressway.

[0039] During the construction of the embodiment of the present application, a coal gangue mixed roadbed body 1 is first laid on the roadbed, and the gaps between the coal gangue mixed roadbed bodies 1 are filled with gravel. Then, the soil base body 2 is laid and compacted, and then a coal gangue mixed base layer 3 is laid, and the gaps between the coal gangue are filled with gravel.

[0040] Among them, the grading between coal gangue and stone (i.e. crushed stone) can use existing technology, for example, you can refer to the public literature: Mix ratio and construction technology of coal gangue graded crushed stone [J]. Municipal Technology, 2015, 33(06): 180-183. Mix ratio design of coal gangue graded crushed stone in the middle and lower base.

[0041] It is also covered with an asphalt pavement 4, which penetrates into the gaps in the coal gangue mixed base layer 3. The road surface is covered with the asphalt pavement 4, and the asphalt pavement 4 also penetrates into the coal gangue mixed roadbed 1, the soil base 2, and the coal gangue mixed base layer 3, thereby increasing the strength of the road surface. At the same time, the use of the coal gangue mixed roadbed 1 and the coal gangue mixed base layer 3 reduces the cost of the road surface, while increasing the thickness of the roadbed to avoid settlement of the expressway.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highway gangue roadbed pavement structure, characterized by: The invention comprises a coal gangue mixed roadbed (1), a soil base (2) covering the top of the coal gangue mixed roadbed (1), a coal gangue mixed base layer (3) covering the top of the soil base layer (2), and an asphalt coal gangue layer covering the top of the coal gangue mixed base layer (3).

2. The highway gangue roadbed pavement structure according to claim 1, characterized in that: The asphalt gangue layer comprises an asphalt pavement (4) covering the top of a gangue mixed base layer (3) and a gangue powder layer (5) covering the asphalt pavement (4).

3. The highway gangue roadbed pavement structure according to claim 2, characterized in that: The thickness of the coal gangue mixed roadbed (1) is 70cm-100cm.

4. The highway gangue roadbed pavement structure according to claim 2, characterized in that: The thickness of the soil matrix (2) is 15 cm to 30 cm.

5. The highway gangue roadbed pavement structure according to claim 2, characterized in that: The thickness of the coal gangue mixed base layer (3) is 20cm-30cm.

6. The highway gangue roadbed pavement structure according to claim 2, characterized in that: The thickness of the asphalt pavement (4) is 20 cm-60 cm.

7. The highway gangue roadbed pavement structure according to claim 6, characterized in that: The asphalt pavement (4) is connected to the coal gangue mixed base (3) and the soil base (2) respectively.

8. The highway gangue roadbed pavement structure according to claim 7, characterized in that: The gangue mixed road base (1), soil base (2), gangue mixed base layer (3), asphalt pavement (4) and gangue powder layer (5) constitute an anti-settling structure.

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