Novel anti-softening expressway roadbed structure

Abstract

The utility model belongs to the field of highway subgrades, and particularly relates to a novel anti-softening highway subgrade structure, which solves the problem that the firmness of the highway subgrade is influenced due to poor anti-softening strength after the existing subgrade is paved, and comprises an asphalt concrete surface layer, and a cement concrete surface layer is arranged below the asphalt concrete surface layer. A cement reinforced inner layer is arranged below the cement concrete surface layer, an anti-softening layer is arranged below the cement reinforced inner layer, a broken stone hardcore is arranged below the anti-softening layer, a lime soil hardcore is arranged below the broken stone hardcore, and a geogrid is arranged below the lime soil hardcore. The left side and the right side of the asphalt concrete surface layer are each provided with a set of check blocks, the left side and the right side of the asphalt concrete surface layer are each provided with a flow guide block, the bottom ends of the two flow guide blocks fixedly communicate with two water guide pipes, the left side and the right side of the broken stone hardcore are each provided with a supporting plate, and the upper surfaces of the two supporting plates are each provided with a positioning groove.

Description

Technical Field

[0001] The utility model relates to the technical field of highway subgrades, and specifically relates to a novel anti-softening highway subgrade structure. Background Technique

[0002] A highway subgrade refers to a strip-shaped structure built as the foundation of a road surface according to the route position and certain technical requirements. It is the foundation of railways and highways, and the subgrade is a linear structure built with soil or stones.

[0003] At present, when constructing the subgrade of a highway, higher requirements are needed for the anti-softening strength of the subgrade. The Chinese patent with the publication number CN217266679U discloses a highway subgrade structure that can prevent subgrade softening, including a highway road surface foundation. Its characteristic is that the highway subgrade structure is composed of the highway road surface foundation, a concrete foundation structure, and a landslide reinforcement structure. The highway road surface foundation is the foundation accumulated by multiple ground surfaces of the highway subgrade structure, and the concrete foundation structure is the foundation strengthened at the bottom of the lowest part of the highway subgrade structure. However, the anti-softening strength of the subgrade in the above patent is poor after laying, and it is easy to collapse, which will affect the firmness of the highway subgrade. Therefore, we propose a novel anti-softening highway subgrade structure to solve the above problems. Content of the Utility Model

[0004] The technical problem solved by the utility model is that the current subgrade has poor anti-softening strength after laying and is prone to collapse, which will affect the firmness of the highway subgrade. The utility model provides a novel anti-softening highway subgrade structure.

[0005] To solve the above technical problems, a novel anti-softening highway subgrade structure provided by the utility model includes an asphalt concrete surface layer. A cement concrete surface layer is provided below the asphalt concrete surface layer. A cement reinforcement inner layer is provided below the cement concrete surface layer. An anti-softening layer is provided below the cement reinforcement inner layer. A gravel cushion layer is provided below the anti-softening layer. A lime soil cushion layer is provided below the gravel cushion layer. A geogrid is provided below the lime soil cushion layer. A group of retaining blocks are provided on both the left and right sides of the asphalt concrete surface layer. Flow guiding blocks are provided on both the left and right sides of the asphalt concrete surface layer. Two water pipes are fixedly communicated with the bottom ends of the two flow guiding blocks.

[0006] Preferably, support plates are provided on both the left and right sides of the gravel cushion layer. The bottom surfaces of the two groups of retaining blocks are respectively in contact with the upper surfaces of the two support plates.

[0007] Preferably, positioning grooves are formed on the upper surfaces of the two support plates, and positioning blocks are fixedly connected to the bottom surfaces of the two groups of retaining blocks.

[0008] Preferably, the bottom ends of the two groups of positioning blocks respectively extend into the two groups of positioning grooves, and the outer surfaces of the two positioning blocks are respectively in contact with the inner walls of the two groups of positioning grooves.

[0009] Preferably, a plurality of reinforcing rods are fixedly embedded in the geogrid, and the top end of each reinforcing rod extends into the lime soil cushion layer.

[0010] Preferably, the bottom surface of the asphalt concrete surface layer is in contact with the upper surface of the cement concrete surface layer, the bottom surface of the cement concrete surface layer is in contact with the upper surface of the cement reinforcement inner layer, and the bottom surface of the cement reinforcement inner layer is in contact with the upper surface of the anti-softening layer.

[0011] Preferably, the bottom surface of the anti-softening layer is in contact with the upper surface of the gravel cushion layer, and the bottom surface of the gravel cushion layer is in contact with the upper surface of the lime soil cushion layer.

[0012] Compared with the related art, the utility model has the following beneficial effects:

[0013] By providing the geogrid and the lime soil cushion layer, and the arrangement of the gravel cushion layer, the compressive strength of the bottom of the roadbed can be increased. By using the anti-softening layer and the cement reinforcement inner layer, the stress of the road surface can be dispersed downward. At the same time, by using the retaining blocks and the support plates, the function of limiting the position during the laying of the roadbed can be achieved, which will make the roadbed more firm after laying, form a firm highway roadbed, improve the anti-softening strength of the roadbed after laying, and avoid the phenomenon of collapse.

[0014] In order to make the above and other purposes, features and advantages of the utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the front view of the present utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the bottom view of the present utility model;

[0018] Figure 3 It is a cross-sectional view of the side view of the present utility model;

[0019] Figure 4This is a cross-sectional view of the side view of the support plate in the present utility model.

[0020] Reference numerals in the figure:

[0021] 1. Asphalt concrete surface layer; 2. Cement concrete surface layer; 3. Cement reinforced inner layer; 4. Anti-softening layer; 5. Crushed stone cushion layer; 6. Lime soil cushion layer; 7. Geogrid; 8. Support plate; 9. Block; 10. Positioning block; 11. Positioning groove; 12. Reinforcement rod; 13. Flow guide block; 14. Water guide pipe. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4 , a novel anti-softening highway subgrade structure, including an asphalt concrete surface layer 1, a cement concrete surface layer 2 is provided below the asphalt concrete surface layer 1, a cement reinforced inner layer 3 is provided below the cement concrete surface layer 2, an anti-softening layer 4 is provided below the cement reinforced inner layer 3, a crushed stone cushion layer 5 is provided below the anti-softening layer 4, a lime soil cushion layer 6 is provided below the crushed stone cushion layer 5, a geogrid 7 is provided below the lime soil cushion layer 6, a group of blocks 9 are provided on both the left and right sides of the asphalt concrete surface layer 1, flow guide blocks 13 are provided on both the left and right sides of the asphalt concrete surface layer 1, and two water guide pipes 14 are fixedly communicated with the bottom ends of the two flow guide blocks 13. Through the settings of the flow guide blocks 13 and the water guide pipes 14, the function of guiding rainwater is achieved, and the downward leakage of rainwater will be reduced.

[0024] Preferably, support plates 8 are provided on both the left and right sides of the crushed stone cushion layer 5, the bottom surfaces of the two groups of blocks 9 are respectively in contact with the upper surfaces of the two support plates 8, positioning grooves 11 are opened on the upper surfaces of the two support plates 8, positioning blocks 10 are fixedly connected to the bottom surfaces of the two groups of blocks 9, the bottom ends of the two groups of positioning blocks 10 respectively extend into the two groups of positioning grooves 11, and the outer surfaces of the two positioning blocks 10 are respectively in contact with the inner walls of the two groups of positioning grooves 11. Through the settings of the support plates 8 and the positioning grooves 11 and the cooperation with the positioning blocks 10, the function of limiting the installation of the blocks 9 is achieved, and better limiting and blocking can be carried out during the subgrade paving.

[0025] Preferably, a plurality of reinforcing bars 12 are fixedly embedded inside the geogrid 7, and the top end of each reinforcing bar 12 extends into the lime soil cushion 6. The bottom surface of the asphalt concrete surface layer 1 is in contact with the upper surface of the cement concrete surface layer 2. The bottom surface of the cement concrete surface layer 2 is in contact with the upper surface of the cement reinforcement inner layer 3. The bottom surface of the cement reinforcement inner layer 3 is in contact with the upper surface of the anti-softening layer 4. The bottom surface of the anti-softening layer 4 is in contact with the upper surface of the gravel cushion 5. The bottom surface of the gravel cushion 5 is in contact with the upper surface of the lime soil cushion 6. Through the arrangement of the reinforcing bars 12, the strength of the bottom of the roadbed is deepened. By sequentially laying the gravel cushion 5, the anti-softening layer 4, the cement reinforcement inner layer 3, the cement concrete surface layer 2 and the asphalt concrete surface layer 1, the strength of the roadbed will be more firm.

[0026] The specific implementation process of the present invention is as follows: First, the geogrid 7, the lime soil cushion 6 and the gravel cushion 5 are sequentially laid from bottom to top on the ground. Then, the support plates 8 and the stoppers 9 are laid and limited on both sides of the roadbed. Next, the anti-softening layer 4, the cement reinforcement inner layer 3, the cement concrete surface layer 2 and the asphalt concrete surface layer 1 are sequentially laid above the gravel cushion 5, and then a firm highway roadbed can be formed.

[0027] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention. In addition, it should be understood that although this specification is described according to the implementation manners, not each implementation manner only includes an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. A new type of anti-softening highway subgrade structure, including an asphalt concrete surface layer (1), characterized in that: Below the asphalt concrete surface layer (1), there is a cement concrete surface layer (2). Below the cement concrete surface layer (2), there is a cement reinforced inner layer (3). Below the cement reinforced inner layer (3), there is an anti-softening layer (4). Below the anti-softening layer (4), there is a gravel cushion layer (5). Below the gravel cushion layer (5), there is a soil cushion layer (6). Below the soil cushion layer (6), there is a geogrid (7). On both the left and right sides of the asphalt concrete surface layer (1), there is a set of retaining blocks (9). On both the left and right sides of the asphalt concrete surface layer (1), there are diversion blocks (13). At the bottom ends of the two diversion blocks (13), two water pipes (14) are fixedly connected and communicated respectively.

2. The novel anti-softening highway subgrade structure according to claim 1, characterized in that: On both the left and right sides of the gravel cushion layer (5), there are support plates (8). The bottom surfaces of the two sets of retaining blocks (9) are respectively in contact with the upper surfaces of the two support plates (8).

3. A novel anti-softening highway subgrade structure according to claim 2, characterized in that: On the upper surfaces of the two support plates (8), positioning grooves (11) are formed. On the bottom surfaces of the two sets of retaining blocks (9), positioning blocks (10) are fixedly connected.

4. A novel anti-softening highway subgrade structure according to claim 3, characterized in that: The bottom ends of the two sets of positioning blocks (10) respectively extend into the interiors of the two sets of positioning grooves (11). The outer surfaces of the two positioning blocks (10) are respectively in contact with the inner walls of the two sets of positioning grooves (11).

5. A novel anti-softening highway subgrade structure according to claim 1, characterized in that: Inside the geogrid (7), a plurality of reinforcing rods (12) are fixedly embedded. The top end of each reinforcing rod (12) extends into the soil cushion layer (6).

6. A novel anti-softening highway subgrade structure according to claim 1, characterized in that: The bottom surface of the asphalt concrete surface layer (1) is in contact with the upper surface of the cement concrete surface layer (2). The bottom surface of the cement concrete surface layer (2) is in contact with the upper surface of the cement reinforced inner layer (3). The bottom surface of the cement reinforced inner layer (3) is in contact with the upper surface of the anti-softening layer (4).

7. A novel anti-softening highway subgrade structure according to claim 1, characterized in that: The bottom surface of the anti-softening layer (4) is in contact with the upper surface of the gravel cushion layer (5). The bottom surface of the gravel cushion layer (5) is in contact with the upper surface of the soil cushion layer (6).

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