Rural highway pavement structure

Abstract

The utility model discloses a rural highway pavement structure. The pavement structure comprises a gravel base cushion layer, the cement stabilized macadam base layer is laid on the macadam base cushion layer; the cement concrete base is arranged on the macadam base cushion layer, and the cement concrete base and the cement stabilized macadam base layer are overlapped on the same layer; the asphalt concrete layer is arranged on the cement stabilized macadam base layer and the cement concrete base; wherein an angle steel vertical seat is fixedly arranged on the cement concrete base, and the edge of the asphalt concrete layer extends to the angle steel vertical seat. The cement concrete base and the pavement structure are arranged in a lap joint manner, so that the integrity and the stability of the whole pavement structure are improved; and the asphalt concrete layer is subjected to edge closing through the angle steel vertical seats, construction rolling of the asphalt concrete layer is facilitated, and the construction quality is guaranteed. The pavement structure layout is compact, the occupied area is small, the influence on the environment along the line is small, and the requirements of increasingly strict cultivated land, permanent basic farmlands, irrigation canals and other rural highway land along the line can be well met.

Description

Technical Field

[0001] The utility model generally relates to the technical field of road construction, and particularly relates to a rural road pavement structure. Background Art

[0002] With the development of rural transportation infrastructure construction, there are more and more restrictive factors faced by rural roads. Especially in the cases involving basic farmland protection, ecological environment protection, etc., a pavement structure that can control the implementation scope is generally required to adapt to the construction conditions with limited land use.

[0003] However, the existing rural road pavements currently adopt a structural form of gradually widening and slope - releasing layer by layer from top to bottom, resulting in a large occupied area of the overall road structure and a relatively high project cost, and there is a situation of resource waste. In addition, conventional rural roads generally use earthen shoulders and strip stones, which increase the later maintenance and repair costs. Content of the Utility Model

[0004] In view of the above - mentioned defects or deficiencies in the prior art, it is expected to provide a rural road pavement structure that can improve the integrity and stability of the entire pavement structure and reduce the land use scale of the road.

[0005] The present application provides a rural road pavement structure, and the pavement structure includes:

[0006] A crushed stone base cushion;

[0007] A cement - stabilized crushed stone base layer laid on the crushed stone base cushion;

[0008] A cement concrete pedestal arranged on the crushed stone base cushion, and the cement concrete pedestal is lap - jointed with the cement - stabilized crushed stone base layer at the same layer;

[0009] An asphalt concrete layer arranged on the cement - stabilized crushed stone base layer and the cement concrete pedestal;

[0010] Wherein, an angle steel stand is fixedly arranged on the cement concrete pedestal, and the edge of the asphalt concrete layer extends to the angle steel stand.

[0011] Optionally, the pavement structure includes a pavement area and a slope area arranged along the direction perpendicular to the pavement extension direction, and the angle steel stand is arranged between the pavement area and the slope area.

[0012] Optionally, the angle steel stand includes a first seat part and a second seat part arranged vertically, the side surface of the asphalt concrete layer extends to the first seat part, and the bottom surface of the asphalt concrete layer extends to the second seat part.

[0013] Optionally, the second seat part is fixedly arranged on the cement concrete pedestal through expansion bolts.

[0014] Optionally, the cement stabilized macadam base course includes a base portion and a first overlapping portion provided on one side of the base portion, and the height of the first overlapping portion is less than that of the base portion.

[0015] Optionally, the cement stabilized macadam base course includes a first cement stabilized macadam sub-layer and a second cement stabilized macadam sub-layer laid in a stacked manner. The first cement stabilized macadam sub-layer is provided on the side close to the crushed stone base course. The length of the first cement stabilized macadam sub-layer is greater than that of the second cement stabilized macadam sub-layer, and the first overlapping portion is provided on the first cement stabilized macadam sub-layer.

[0016] Optionally, the cement concrete pedestal includes a pedestal portion and a second overlapping portion provided on one side of the pedestal portion. The height of the second overlapping portion is less than that of the pedestal portion, and the first overlapping portion and the second overlapping portion are fixedly arranged in an overlapping and mating manner.

[0017] Optionally, the cement concrete pedestal extends from the road surface area to the slope area.

[0018] Optionally, the crushed stone base course extends from the road surface area to the slope area, and the extension length of the crushed stone base course in the road surface area is greater than the extension length of the cement concrete pedestal in the road surface area.

[0019] Optionally, the asphalt concrete layer includes multiple asphalt concrete sub-layers laid in a stacked manner.

[0020] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0021] For the rural road surface provided by the embodiments of the present invention, through the overlapping arrangement of the cement concrete pedestal and the road surface structure, the integrity and stability of the entire road surface structure are improved; the edge of the asphalt concrete layer is trimmed by the angle steel seat, which is convenient for the construction and rolling of the asphalt concrete layer and ensures the construction quality.

[0022] For the rural road surface provided by the embodiments of the present invention, the slope area can adopt the ecological slope method to reduce the environmental impact and improve the landscape effect; the layout is compact, the occupied area is small, the impact on the surrounding environment is small, and it can well meet the requirements of rural road along - side land such as cultivated land, permanent basic farmland, irrigation canals, etc., which are becoming increasingly strict. Description of the Drawings

[0023] By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious:

[0024] Figure 1 It is a cross - sectional view of a rural road surface structure provided by an embodiment of the present invention;

[0025] In the figure,

[0026] 10, crushed stone base course; 20, cement stabilized crushed stone base; 30, cement concrete pedestal; 40, asphalt concrete layer; 50, angle steel stand; 60, slope; 70, expansion bolt;

[0027] D1, road surface area; D2, slope area;

[0028] 21, first cement stabilized crushed stone sub-layer; 22, second cement stabilized crushed stone sub-layer; 23, first overlapping part; 31, second overlapping part;

[0029] 51, first seat part; 52, second seat part; 41, asphalt concrete lower layer; 42, asphalt concrete upper layer. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and embodiments.

[0032] Please refer to Figure 1 , this application provides a rural road surface structure, and the road surface structure includes:

[0033] A crushed stone base course 10;

[0034] A cement stabilized crushed stone base 20 laid on the crushed stone base course 10;

[0035] A cement concrete pedestal 30 arranged on the crushed stone base course 10, and the cement concrete pedestal 30 is arranged in a same-layer overlapping manner with the cement stabilized crushed stone base 20;

[0036] An asphalt concrete layer 40 arranged on the cement stabilized crushed stone base 20 and the cement concrete pedestal 30;

[0037] Wherein, an angle steel stand 50 is fixedly arranged on the cement concrete pedestal 30, and the edge of the asphalt concrete layer 40 extends to the angle steel stand 50.

[0038] In an embodiment of this application, the road surface structure includes a road surface area D1 and a slope area D2 arranged along a direction perpendicular to the road surface extension direction, and the angle steel stand 50 is arranged between the road surface area D1 and the slope area D2.

[0039] In the embodiment of the present application, the slope area D2 can adopt the ecological slope surface 60 to reduce the environmental impact and improve the landscape effect. In different embodiments, when the land use conditions are limited, the slope area D2 can be directly connected to the adjacent plots, structures, etc. along the line. In the embodiment of the present application, the inclination angle of the upper slope surface 60 of the slope area D2 is not limited and can be adjusted according to the land use conditions and other factors in different embodiments.

[0040] It should be noted that in the embodiment of the present application, the direction along the road surface extension is defined as the length direction, the direction perpendicular to the road surface extension is defined as the width direction, and the direction perpendicular to the plane of the road surface is defined as the height direction. Figure 1 What is shown is a cross-sectional view of the road surface structure along the width direction.

[0041] In an embodiment of the present application, the angle steel stand 50 includes a first seat portion 51 and a second seat portion 52 that are vertically arranged. The side surface of the asphalt concrete layer 40 extends to the first seat portion 51, and the bottom surface of the asphalt concrete layer 40 extends to the second seat portion 52. Optionally, the second seat portion 52 is fixedly arranged on the cement concrete base 30 through an expansion bolt 70.

[0042] In the embodiment of the present application, the angle steel stand 50 is used to trim the edge of the asphalt concrete layer 40, which is convenient for the construction and rolling of the asphalt concrete layer 40 and ensures the construction quality. It can be understood that the height of the first seat portion 51 can be flush with the height of the asphalt concrete layer 40, and the width of the first seat portion 51 is not limited in the embodiment of the present application.

[0043] In the embodiment of the present application, the angle steel stand 50 can be made of weathering angle steel. Weathering angle steel is a kind of steel resistant to atmospheric corrosion and belongs to the low alloy steel material. It is between ordinary steel and stainless steel and is made by adding a small amount of corrosion-resistant elements such as copper and nickel to plain carbon steel. Weathering steel plate has characteristics such as toughness, plastic elongation, abrasion resistance, high temperature resistance, and fatigue resistance, and its weather resistance can reach 2 - 8 times that of plain carbon steel. This kind of steel has the characteristic of rust resistance, which can make the components anti-corrosion and extend their service life, reduce the thickness and consumption, and save labor and energy at the same time.

[0044] Optionally, the cement stabilized macadam base layer 20 includes a base portion and a first overlapping portion 23 arranged on one side of the base portion, and the height of the first overlapping portion 23 is less than that of the base portion.

[0045] Specifically, the cement stabilized macadam base layer 20 includes a first cement stabilized macadam sub-layer 21 and a second cement stabilized macadam sub-layer 22 that are laid in layers. The first cement stabilized macadam sub-layer 21 is arranged on the side close to the crushed stone base layer 10, the length of the first cement stabilized macadam sub-layer 21 is greater than that of the second cement stabilized macadam sub-layer 22, and the first overlapping portion 23 is arranged on the first cement stabilized macadam sub-layer 21.

[0046] It should be noted that in the embodiments of the present application, there is no limitation on the same-layer lap joint manner between the cement concrete base 30 and the cement stabilized macadam base course 20. In this embodiment, it is shown that the length of the first cement stabilized macadam sub-layer 21 is greater than the length of the second cement stabilized macadam sub-layer 22, so as to form a first lap joint portion 23 on the first cement stabilized macadam sub-layer 21. In other embodiments, the first lap joint portion 23 may also be provided on the second cement stabilized macadam sub-layer 22, that is, the length of the second cement stabilized macadam sub-layer 22 is greater than the length of the first cement stabilized macadam sub-layer 21. It is set according to needs in different embodiments.

[0047] Correspondingly, the cement concrete base 30 includes a base portion and a second lap joint portion 31 provided on one side of the base portion. The height of the second lap joint portion 31 is less than that of the base portion, and the first lap joint portion 23 and the second lap joint portion 31 are lap jointed and fixedly arranged.

[0048] It can be understood that the first lap joint portion 23 and the second lap joint portion 31 are lap jointed to realize the fixed connection between the cement stabilized macadam base course 20 and the cement concrete base 30. The setting manner of the second lap joint portion 31 can be adjusted according to the position of the first lap joint portion 23, and the present application does not limit this.

[0049] In another embodiment of the present application, during setting, the cement concrete base 30 extends from the road surface area D1 to the slope area D2; the gravel base cushion layer 10 extends from the road surface area D1 to the slope area D2, and the extension length of the gravel base cushion layer 10 in the road surface area D1 is greater than the extension length of the cement concrete base 30 in the road surface area D1. In the present application, by extending the cement concrete base 30 and the gravel base cushion layer 10, the stability of the angle steel seat 50 can be ensured, and the construction quality of the asphalt concrete layer 40 can be ensured; by increasing the width of the extended cement concrete base 30 and the gravel base cushion layer 10, the integrity and stability of the entire road surface structure can be improved, and the stability of the cement concrete base 30 can be ensured; at the same time, the stability of the slope surface 60 can also be improved, and the bearing capacity and service life of the road can be enhanced.

[0050] In the embodiments of the present application, the gravel base cushion layer 10 may adopt a graded gravel cushion layer. It can be understood that graded gravel is a mixture composed of various aggregate particles of different sizes. When its grading meets the requirements of the technical specifications, it is called graded aggregate. Graded aggregate includes graded gravel, graded crushed gravel (a mixture of crushed stone and gravel, and often the over-sized particles in the gravel are crushed and then combined with the gravel to form crushed gravel) and graded gravel (or graded sand and gravel). It is selected according to needs in different embodiments.

[0051] In the embodiments of the present application, there is no limitation on the extension width of the cement concrete base 30 and the crushed stone base cushion 10 in the slope area D2, and it is set as required in different embodiments. In the embodiments of the present application, the edge of the crushed stone base cushion 10 can be set with the same slope as the slope surface 60, which is convenient for improving the flatness and stability of the slope surface 60.

[0052] Optionally, the asphalt concrete layer 40 includes multiple layers of asphalt concrete sub-layers laid in a stacked manner. In the embodiments of the present application, there is no limitation on the number of asphalt concrete sub-layers in the asphalt concrete layer 40, which can be one layer, two layers, three layers or more layers. In different embodiments, each asphalt concrete sub-layer can have different design parameters. In this embodiment, two layers of asphalt concrete sub-layers are taken as an example for illustration. For example, it includes an asphalt concrete lower layer 41 and an asphalt concrete upper layer 42. Among them, the particle size of the mixture of the asphalt concrete lower layer 41 is larger than that of the mixture of the asphalt concrete upper layer 42.

[0053] In the embodiments of the present application, the construction steps of the rural road pavement structure are as follows:

[0054] First step, lay the crushed stone base cushion 10 at the bottom first. For example, the thickness of the bottom crushed stone base cushion 10 is 15 cm.

[0055] Second step, arrange the cement stabilized crushed stone base layer 20 on the crushed stone base cushion 10. Among them, the cement stabilized crushed stone base layer 20 can be constructed and compacted in layers, and the implementation width of each layer is controlled to form a stepped shape on the outside, which is convenient for forming the first overlapping part 23. For example, the thickness of the cement stabilized crushed stone base layer 20 is 30 cm, and the cement content is 4.5%. The base layer is constructed in two upper and lower layers, with a thickness of 15 cm for each layer, and compacted layer by layer. The height of the first overlapping layer on the outside is 15 cm, and the depth is 10 cm.

[0056] Third step, cast the cement concrete base 30 in situ at the stepped position of the cement stabilized crushed stone base layer 20 for overlapping, so that the top surface of the cement concrete base 30 is at the same horizontal height as the top surface of the cement stabilized crushed stone base layer 20. For example, cast a C20 cement concrete base 30 with a thickness of 30 cm at the outside step to overlap with the cement stabilized crushed stone base layer 20, forming a second overlapping part 31 that overlaps and cooperates with the first overlapping part 23.

[0057] Fourth step, arrange the angle steel seat 50 on the cement concrete base 30 and fix it with expansion bolts 70. For example, use M8@300mm expansion bolts 708 to fix the ∠100mm×100mm×6mm angle steel seat 50 on the cement concrete base 30.

[0058] In the fifth step, after the angle steel is fixed, the lower layer 41 of asphalt concrete and the upper layer 42 of asphalt concrete are laid in layers and compacted layer by layer using a rolling machine. For example, the lower layer 41 of 6 cm medium-sized (AC-20C) asphalt concrete and the upper layer 42 of 4 cm fine-grained dense-graded (AC-10C, SBS modified) asphalt concrete are laid respectively and compacted layer by layer.

[0059] In the sixth step, slope treatment is carried out on the slope 60 using an ecological slope.

[0060] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0062] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Terms such as "arranged" as used herein can mean that a component is directly attached to another component or that a component is attached to another component through an intermediate member. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0063] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present invention within the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection required by the present invention.

Claims

1. A rural road pavement structure, characterized in that: The pavement structure comprises: Crushed stone base cushion; a cement-stabilized crushed stone base layer laid on the crushed stone base cushion layer; A cement concrete base is arranged on the gravel base cushion layer, wherein the cement concrete base is overlapped with the cement-stabilized gravel base layer in the same layer; An asphalt concrete layer is provided on the cement stabilized crushed stone base and the cement concrete base; Wherein, an angle steel stand is fixedly arranged on the cement concrete base, and the edge of the asphalt concrete layer extends to the angle steel stand.

2. The rural road pavement structure according to claim 1, characterized in that: The pavement structure comprises a pavement area and a slope area which are arranged perpendicular to the extending direction of the pavement, and the angle steel stand is arranged between the pavement area and the slope area.

3. The rural road pavement structure according to claim 1, characterized in that: The angle steel stand comprises a first seat portion and a second seat portion which are vertically arranged. The side surface of the asphalt concrete layer extends to the first seat portion, and the bottom surface of the asphalt concrete layer extends to the second seat portion.

4. The rural road pavement structure according to claim 3, characterized in that: The second seat portion is fixed on the cement concrete base by expansion bolts.

5. The rural road pavement structure according to claim 1, characterized in that: The cement-stabilized crushed stone base layer comprises a base layer portion and a first overlapping portion arranged at one side of the base layer portion, wherein the height of the first overlapping portion is smaller than that of the base layer portion.

6. The rural road pavement structure according to claim 5, characterized in that: The cement-stabilized gravel base layer includes a first cement-stabilized gravel layer and a second cement-stabilized gravel layer which are stacked and laid, the first cement-stabilized gravel layer is arranged on a side close to the gravel-based cushion layer, the length of the first cement-stabilized gravel layer is greater than the length of the second cement-stabilized gravel layer, and the first overlapping portion is arranged on the first cement-stabilized gravel layer.

7. The rural road pavement structure according to claim 5, characterized in that: The cement concrete base includes a base portion and a second overlapping portion arranged at one side of the base portion, the height of the second overlapping portion is smaller than the base portion, and the first overlapping portion and the second overlapping portion are overlapped and fixedly arranged.

8. The rural road pavement structure according to claim 2, characterized in that: The cement concrete base extends from the road surface area to the slope area.

9. The rural road pavement structure according to claim 8, characterized in that: The crushed stone-based cushion layer extends from the road surface area to the slope area, and the extension length of the crushed stone-based cushion layer in the road surface area is greater than the extension length of the cement concrete base in the road surface area.

10. The rural road pavement structure according to claim 1, characterized in that: The asphalt concrete layer includes multiple asphalt concrete sub-layers which are stacked and laid.

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