Pavement base layer structure capable of enhancing crack resistance of roller compacted concrete

Abstract

The utility model relates to a pavement base structure capable of enhancing crack resistance of roller compacted concrete, which comprises a foundation layer, a protective layer is poured at the top of the foundation layer, a roller compacted concrete layer is poured at the top of the protective layer, and a water pipeline is laid in a surface layer. A plurality of vertical rods are embedded in the positions, located on the two opposite sides of the water passing pipeline, in the water passing pipeline, two transverse steel bars are bound between every two corresponding vertical rods located on the two opposite sides of the water passing pipeline through metal wires, and two vertical steel bars are bound between every two adjacent vertical rods located on the same side of the water passing pipeline through metal wires. The utility model relates to the technical field of pavement base structures. The vertical rods, the transverse steel bars and the vertical steel bars are arranged on the outer side of the water pipeline, so that the strength of the roller compacted concrete layer is enhanced, the anti-cracking performance of the outer side of the water pipeline is improved in a targeted mode, cracks, deformation and even collapse of the outer side of the water pipeline due to long-term rolling of vehicles are prevented, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pavement base structure, in particular to a pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete. Background Art

[0002] Roller compacted concrete is a dry, cement-poor concrete that is made by mixing silicate cement, pozzolanic admixtures, water, admixtures, sand and graded coarse aggregate to produce a dry, hard concrete with no slump. It has been fully utilized in highway construction.

[0003] Concrete pavement has become the main choice for urban road construction due to its high strength and good wear resistance. However, concrete pavement often has cracks, which poses a potential threat to the safety and normal use of the road. In particular, in road construction, drainage pipes need to be pre-set for highway drainage. Since the drainage pipes are hollow, the supporting capacity of the road at this location is low. After long-term vehicle rolling, it is easy to crack, deform or even collapse, posing a safety hazard. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pavement base structure that can enhance the anti-cracking performance of roller compacted concrete, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A pavement base structure capable of enhancing the crack resistance of roller compacted concrete, comprising a base layer, a protective layer is cast on the top of the base layer, a roller compacted concrete layer is cast on the top of the protective layer, and a surface layer is cast on the top of the roller compacted concrete layer;

[0007] A water pipe is laid in the surface layer, and a plurality of vertical rods are buried in the water pipe at opposite sides of the water pipe. Two horizontal steel bars are tied with metal wires between the corresponding two vertical rods at opposite sides of the water pipe. The corresponding two horizontal steel bars are respectively located at the upper and lower sides of the water pipe, and two vertical steel bars are tied with metal wires between the adjacent two vertical rods on the same side of the water pipe.

[0008] By adopting the above technical solution, vertical rods, horizontal steel bars and vertical steel bars are set on the outside of the water pipe, which enhances the strength of the rolled concrete layer and specifically improves the crack resistance of the outside of the water pipe, preventing the area from cracking, deformation or even collapse due to long-term rolling of vehicles, thereby reducing safety hazards.

[0009] Furthermore, the base layer includes a lime sand and gravel layer and a rammed earth layer from top to bottom, and the protective layer is located on the top of the lime sand and gravel layer.

[0010] Furthermore, the protective layer is a lime fly ash layer and a cement gravel layer from top to bottom, the lime fly ash layer is located at the bottom of the roller compacted concrete layer, and the cement gravel layer is located at the top of the lime sand and gravel layer.

[0011] Furthermore, the surface layer comprises a natural asphalt layer and an asphalt concrete layer from top to bottom, and the asphalt concrete layer is located on top of the rolled concrete layer.

[0012] Furthermore, the upper and lower ends of the vertical rod extend into the surface layer and the protective layer respectively.

[0013] Furthermore, the top and the bottom of the vertical rod are fixedly connected with end plates, and the corresponding two end plates are respectively located in the asphalt concrete layer and the lime fly ash layer.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects:

[0015] 1. The pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete, by arranging vertical bars, horizontal steel bars and vertical steel bars on the outside of the water pipe, enhances the strength of the roller compacted concrete layer, specifically improves the anti-cracking performance of the outside of the water pipe, prevents the area from being cracked, deformed or even collapsed due to long-term rolling of vehicles, and reduces safety hazards;

[0016] 2. The pavement base structure can enhance the anti-cracking performance of rolled concrete. The protective layer is composed of a lime fly ash layer and a cement crushed stone layer, which has the functions of resisting expansion and cold shrinkage, thereby solving the problem of damage to the pavement base structure caused by temperature changes and increasing the service life of the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a front cross-sectional view of a pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete in this embodiment;

[0019] Figure 2 is a side cross-sectional view of a pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete in this embodiment;

[0020] Figure 3It is a schematic diagram of the structure in the roller compacted concrete layer in a pavement base structure capable of enhancing the anti-cracking performance of the roller compacted concrete in this embodiment;

[0021] Figure 4 is a front cross-sectional view of a base layer in a pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete in this embodiment;

[0022] Figure 5 is a front cross-sectional view of a protective layer in a pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete in this embodiment;

[0023] Figure 6 It is a front cross-sectional view of the surface layer of a pavement base structure of this embodiment that can enhance the anti-cracking performance of roller compacted concrete.

[0024] In the figure, 1, base layer; 11, rammed earth layer; 12, lime sand and gravel layer; 2, protective layer; 21, lime fly ash layer; 22, cement gravel layer; 3, rolled concrete layer; 4, surface layer; 41, natural asphalt layer; 42, asphalt concrete layer; 5, water pipes; 6, vertical rods; 7, horizontal steel bars; 8, vertical steel bars; 9, end plates. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example:

[0027] Reference Figures 1 to 6 The utility model discloses a pavement base structure capable of enhancing the crack resistance of rolled concrete, comprising a base layer 1, a protective layer 2 is cast on the top of the base layer 1, a rolled concrete layer 3 is cast on the top of the protective layer 2, and a surface layer 4 is cast on the top of the rolled concrete layer 3;

[0028] A water pipe 5 is laid in the surface layer 4, and a plurality of vertical rods 6 are buried in the water pipe 5 at opposite sides of the water pipe 5. Two horizontal steel bars 7 are tied by metal wires between the corresponding two vertical rods 6 at opposite sides of the water pipe 5. The corresponding two horizontal steel bars 7 are respectively located at the upper and lower sides of the water pipe 5, and two vertical steel bars 8 are tied by metal wires between the adjacent two vertical rods 6 at the same side of the water pipe 5. The water pipe 5 is made of a mixed material of concrete and steel bars.

[0029] By arranging vertical rods 6, horizontal steel bars 7 and vertical steel bars 8 on the outside of the water pipe 5, the strength of the rolled concrete layer 3 is enhanced, and the crack resistance of the outside of the water pipe 5 is specifically improved to prevent cracks, deformation or even collapse caused by long-term vehicle rolling, thereby reducing safety hazards.

[0030] The base layer 1 includes a lime sand and gravel layer 12 and a rammed earth layer 11 from top to bottom, and the protective layer 2 is located on the top of the lime sand and gravel layer 12. The protective layer 2 includes a lime fly ash layer 21 and a cement gravel layer 22 from top to bottom, the lime fly ash layer 21 is located at the bottom of the roller compacted concrete layer 3, and the cement gravel layer 22 is located on the top of the lime sand and gravel layer 12.

[0031] The protective layer 2 is composed of a lime fly ash layer 21 and a cement crushed stone layer 22, which has the functions of resisting expansion and contraction, thereby solving the problem of damage to the road base structure caused by temperature changes and increasing the service life of the road.

[0032] The surface layer 4 includes a natural asphalt layer 41 and an asphalt concrete layer 42 from top to bottom, and the asphalt concrete layer 42 is located on the top of the rolled concrete layer 3 .

[0033] In this embodiment, the lime sand and gravel layer 12, rammed earth layer 11, lime fly ash layer 21, cement gravel layer 22, rolled concrete layer 3, natural asphalt layer 41 and asphalt concrete layer 42 involved are all components known to technical personnel in this field, and the standard parts used in this application document can all be purchased from the market, and can be customized according to the description in the specification and drawings. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0034] The upper and lower ends of the vertical rod 6 extend into the surface layer 4 and the protective layer 2 respectively. The vertical rod 6 connects the surface layer 4, the roller compacted concrete layer 3 and the protective layer 2, thereby improving the integrity of the road base structure and further improving the anti-deformation ability.

[0035] The top and bottom of the vertical rod 6 are fixedly connected with end plates 9, and the corresponding two end plates 9 are respectively located in the asphalt concrete layer 42 and the lime fly ash layer 21. The diameter of the end plate 9 is larger than the diameter of the vertical rod 6, so that the deformation of the asphalt concrete layer 42 and the lime fly ash layer 21 at this location can be hindered, and the deformation resistance of the road base structure is further improved.

[0036] The vertical rod 6 and the end plate 9 are both made of steel.

[0037] When laying the road base structure, first lay the rammed earth layer 11, the lime sand and gravel layer 12 and the cement crushed stone layer 22 in sequence, lay the lime fly ash layer 21 after leveling, and place a number of vertical rods 6 at corresponding positions, then level the lime fly ash layer 21, place the water pipe 5 between two rows of vertical rods 6, fix the horizontal steel bars 7 and the vertical steel bars 8 by metal wires, and then pour concrete to form the rolled concrete layer 3, and after solidification, lay the asphalt concrete layer 42 and the natural asphalt layer 41 and level them.

[0038] The implementation principle of this embodiment is:

[0039] Vertical rods 6, horizontal steel bars 7 and vertical steel bars 8 are arranged on the outside of the water pipe 5 to enhance the strength of the rolled concrete layer 3 and specifically improve the crack resistance of the outside of the water pipe 5 to prevent cracks, deformation or even collapse caused by long-term vehicle rolling, thereby reducing safety hazards.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete, comprising a base layer (1), characterized in that: A protective layer (2) is cast on the top of the base layer (1), a roller-compacted concrete layer (3) is cast on the top of the protective layer (2), and a surface layer (4) is cast on the top of the roller-compacted concrete layer (3); A water pipe (5) is laid in the surface layer (4), and a plurality of vertical rods (6) are buried in the water pipe (5) at opposite sides of the water pipe (5). Two horizontal steel bars (7) are tied by metal wires between corresponding two vertical rods (6) at opposite sides of the water pipe (5). The corresponding two horizontal steel bars (7) are respectively located at the upper and lower sides of the water pipe (5), and two vertical steel bars (8) are tied by metal wires between two adjacent vertical rods (6) at the same side of the water pipe (5).

2. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete according to claim 1, characterized in that: The base layer (1) comprises, from top to bottom, a lime sand stone layer (12) and a rammed earth layer (11), and the protective layer (2) is located on top of the lime sand stone layer (12).

3. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete according to claim 2, characterized in that: The protective layer (2) comprises a lime fly ash layer (21) and a cement crushed stone layer (22) from top to bottom, wherein the lime fly ash layer (21) is located at the bottom of the roller compacted concrete layer (3), and the cement crushed stone layer (22) is located at the top of the lime sand and stone layer (12).

4. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete according to claim 3, characterized in that: The surface layer (4) comprises, from top to bottom, a natural asphalt layer (41) and an asphalt concrete layer (42), and the asphalt concrete layer (42) is located on top of the rolled concrete layer (3).

5. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete according to claim 4, characterized in that: The upper and lower ends of the vertical rod (6) extend into the surface layer (4) and the protective layer (2) respectively.

6. A pavement base structure capable of enhancing the anti-cracking performance of roller compacted concrete according to claim 5, characterized in that: The top and bottom of the vertical rod (6) are fixedly connected with end plates (9), and the corresponding two end plates (9) are respectively located in the asphalt concrete layer (42) and the lime fly ash layer (21).

Images