Highway roadbed structure capable of preventing roadbed softening

Abstract

The utility model belongs to the technical field of highway subgrade, in particular to a highway subgrade structure capable of preventing subgrade softening, which is characterized in that a gravel layer is flatly laid on a rammed earth layer to improve the supporting performance, the rammed earth layer can be prevented from sinking, the distributed stress borne by the pavement is effectively dispersed, the stress is more uniform, and the service life is prolonged. The glue-doped cement layer and the asphalt layer laid at the upper end can increase the surface friction force of the roadbed and improve the bearing strength, and the multiple sets of embedded bodies are longitudinally inserted into the glue-doped cement layer and used for being embedded into the roadbed, so that the overall stability performance of the roadbed is improved; the arc-shaped plate layer is poured in the concrete layer, after rainstorm permeates into the roadbed, under the inertia effect, rainwater slides to the two sides along the topmost portion of the arc-shaped plate layer and is discharged to the outside through the water outlet groove in the other side, the anti-seepage geotechnical cloth can protect side slopes on the two sides of the roadbed, rainwater is prevented from permeating into the roadbed through the side road, the vegetation layer can fully absorb water, and the roadbed is protected from being damaged. And direct contact between rainwater and the bottom rammed earth layer is avoided, and then the anti-seepage capacity of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of highway subgrade, and particularly relates to a highway subgrade structure capable of preventing subgrade softening. Background Technique

[0002] The subgrade is an important structure indispensable for expressways. Coupled with the fact that the operation of the embankment subgrade is not complicated, it is often used in the construction process. For urban development, the construction of roads is indispensable. Roads are linear buildings, and the subgrade is the main body of linear buildings. It runs through the entire line of the road, connects with bridges and tunnels, and it and the road surface jointly bear the action of traffic loads. Practice has proved that without a strong and stable subgrade, there will be no stable road surface.

[0003] After retrieval, the publication number: CN215441239U discloses a subgrade structure capable of preventing subgrade softening. In the utility model, by setting a first concrete layer and a second waterproof layer, the top of the first concrete layer is set as a U-shaped arc surface, and the second waterproof layer is laid on the top of the first concrete layer, which can not only effectively prevent rainwater from further infiltrating downward from the first concrete layer, but also guide the rainwater through the U-shaped arc surface. By setting a water tank, water outlet holes and a cover plate, the rainwater will flow into the water tank under the guidance of the first concrete layer and flow out through the water outlet holes communicated with the water tank. The first waterproof layer can well isolate the rainwater for the second time. Overall, by guiding the rainwater to flow out, it avoids the accumulation of rainwater inside the subgrade and causes subgrade softening. However, in the case of heavy rainfall over a large area, there will still be rainwater infiltrating the base layer, and the water isolation effect on the base layer is average, which in turn causes subgrade softening.

[0004] Therefore, a highway subgrade structure capable of preventing subgrade softening is designed to solve the above problems. Content of the Utility Model

[0005] To solve the problems raised in the above background technique. The utility model provides a highway subgrade structure capable of preventing subgrade softening. After the rammed soil layer is compacted, the gravel layer is laid flat on the rammed soil layer to improve the supporting performance, which can avoid the subsidence of the rammed soil layer and effectively disperse the distributed stress borne by the road surface, making the force more uniform. The upper-laid rubber-mixed cement layer and asphalt layer can increase the surface friction of the subgrade and improve the bearing strength of the inside, and multiple groups of embedded bodies are longitudinally inserted into the rubber-mixed concrete layer for embedding into the subgrade, thereby improving the overall stability performance of the subgrade.

[0006] The arc-shaped plate layer is poured into the concrete layer. After heavy rain seeps into the roadbed, under the action of inertia, the rainwater slides along the top of the arc-shaped plate layer to both sides, and is collected on the top of the anti-seepage geotextile through multiple groups of drainage grooves, and then discharged to the outside through the water outlet grooves on the other side, preventing the roadbed from softening. Moreover, the anti-seepage geotextile can protect the slopes on both sides of the roadbed, avoiding rainwater seeping into the roadbed through the side roads, and the vegetation layer can fully absorb the moisture, avoiding direct contact between the rainwater and the bottom tamped soil layer, thereby improving the anti-seepage ability of the device.

[0007] To achieve the above object, the present utility model provides the following technical solution: A highway roadbed structure capable of preventing roadbed softening, including a high-efficiency roadbed water isolation structure. The high-efficiency roadbed water isolation structure includes a tamped soil layer, a gravel layer, an asphalt layer, an adhesive cement layer, a concrete layer, an anti-seepage geotextile, and an arc-shaped plate layer. The gravel layer is adhesively connected to the upper end of the tamped soil layer for paving the bottom layer, the asphalt layer is coated on the top of the adhesive cement layer, the concrete layer is adhesively connected to the bottom of the adhesive cement layer, the arc-shaped plate layer is inserted into the interior of the concrete layer, and the anti-seepage geotextile is arranged at the bottom of the arc-shaped plate layer.

[0008] As a preferred embodiment of the highway roadbed structure capable of preventing roadbed softening of the present utility model, several groups of the anti-seepage geotextiles are provided, and several groups of the anti-seepage geotextiles are adhesively connected to the upper end of the gravel layer.

[0009] As a preferred embodiment of the highway roadbed structure capable of preventing roadbed softening of the present utility model, several groups of drainage grooves are further opened on the inner side of the bottom of the arc-shaped plate layer.

[0010] As a preferred embodiment of the highway roadbed structure capable of preventing roadbed softening of the present utility model, a slope is opened on the periphery of the high-efficiency roadbed water isolation structure, and the height of the slope is less than 8m.

[0011] As a preferred embodiment of the highway roadbed structure capable of preventing roadbed softening of the present utility model, several groups of embedding bodies arranged at equal intervals are further inserted into the interior of the adhesive cement layer.

[0012] As a preferred embodiment of the highway roadbed structure capable of preventing roadbed softening of the present utility model, a vegetation layer is further adhesively connected at the gaps of the anti-seepage geotextile.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. In the present utility model, the gravel layer is paved on the tamped soil layer to improve the supporting performance, which can avoid the subsidence of the tamped soil layer, effectively disperse the downward pressure of the road surface, and the force is more uniform. The adhesive cement layer and the asphalt layer laid on the upper end can increase the surface friction of the roadbed and improve the bearing strength of the road surface. Moreover, multiple groups of embedding bodies are longitudinally inserted into the adhesive cement layer for embedding into the roadbed, thereby improving the overall stability performance of the roadbed.

[0015] 2. In the present utility model, the arc-shaped plate layer is cast in the concrete layer. After heavy rain seeps into the roadbed, under the action of inertia, the rainwater slides along the top of the arc-shaped plate layer to both sides, and is collected on the top of the anti-seepage geotextile through multiple groups of drainage grooves, and then discharged to the outside through the water outlet groove on the other side, preventing the roadbed from softening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0018] Figure 2 is a distribution diagram of the water outlet groove in the present utility model;

[0019] Figure 3 is a schematic structure diagram of the embedded body in the present utility model;

[0020] Figure 4 is an enlarged effect diagram of the distribution of the vegetation layer in the present utility model;

[0021] In the figure:

[0022] 1. High-efficiency water-blocking structure of the roadbed; 2. Drainage groove; 3. Slope; 4. Embedded body; 5. Vegetation layer; 6. Water outlet groove; 11. Rammed soil layer; 12. Gravel layer; 13. Asphalt layer; 14. Glue-mixed cement layer; 15. Concrete layer; 16. Anti-seepage geotextile; 17. Arc-shaped plate layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the 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 creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figure 1 shown:

[0025] A highway subgrade structure that can prevent subgrade softening. As known from CN215441239U, rainwater is guided through a U-shaped arc surface. By setting a water trough, water outlet holes, and a cover plate, rainwater will flow into the water trough under the guidance of the first concrete slab layer and flow out through the water outlet holes connected to the water trough. The first waterproof layer can well isolate the rainwater for the second time. Overall, by guiding and discharging the rainwater, it avoids the accumulation of rainwater inside the road body and causing road body softening. However, for heavy rainfall over a large area, there will still be rainwater seeping into the base layer, and the water isolation effect on the base layer is average, thus causing subgrade softening. On this basis, a high-efficiency subgrade water isolation structure 1 is added.

[0026] As Figure 1 , Figure 2 and Figure 3 shown:

[0027] In an alternative embodiment: The high-efficiency subgrade water isolation structure 1 includes a rammed earth layer 11, a gravel layer 12, an asphalt layer 13, a glue-mixed cement layer 14, a concrete layer 15, an anti-seepage geotextile 16, and an arc plate layer 17. The gravel layer 12 is adhesively connected to the upper end of the rammed earth layer 11 for paving the bottom layer. The asphalt layer 13 is coated on the top of the glue-mixed cement layer 14. The concrete layer 15 is adhesively connected to the bottom of the glue-mixed cement layer 14. The arc plate layer 17 is inserted into the interior of the concrete layer 15. The anti-seepage geotextile 16 is arranged at the bottom of the arc plate layer 17.

[0028] In this implementation: After the rammed earth layer 11 is compacted, the gravel layer 12 is paved on the rammed earth layer 11 to improve the support performance, which can avoid the subsidence of the rammed earth layer 11, effectively disperse the downward pressure of the road surface, and make the stress more uniform. The glue-mixed cement layer 14 and the asphalt layer 13 laid on the upper end can increase the surface friction of the subgrade and improve the internal bearing strength. And multiple sets of embedded bodies 4 are longitudinally inserted into the glue-mixed cement layer 15 for embedding into the subgrade, thereby improving the overall stability performance of the subgrade.

[0029] It should be noted that: The glue layer of the glue-mixed cement layer 14 is 108 glue to enhance the bonding force and improve the construction performance, and the cement cushion layer is C30 grade cement.

[0030] It should be understood that: The arc plate layer 17 is a hyperbolic steel plate, and the arc plate layer 17 serves the purpose of draining accumulated water.

[0031] Furthermore:

[0032] As Figure 1 , Figure 3 and Figure 4 shown:

[0033] In an alternative embodiment: A number of groups of anti-seepage geotextiles 16 are provided, and the number of groups of anti-seepage geotextiles 16 are adhesively connected to the upper end of the gravel layer 12. A number of groups of drainage grooves 2 are also formed in the inner bottom of the arc-shaped plate layer 17. A slope 3 is formed around the efficient roadbed water isolation structure 1, and the height of the slope 3 is less than 8 m. A number of groups of inserts 4 arranged at equal intervals are also inserted into the internal of the rubberized cement layer 14. A vegetation layer 5 is also adhesively connected at the gaps of the anti-seepage geotextiles 16.

[0034] In this embodiment: The arc-shaped plate layer 17 is poured into the concrete layer 15. After heavy rain seeps into the roadbed, under the action of inertia, the rainwater slides along the top of the arc-shaped plate layer 17 to both sides, and the water is collected on the top of the anti-seepage geotextiles 16 through multiple groups of drainage grooves 2, and then discharged to the outside through the water outlet groove 6 on the other side, preventing the roadbed from softening. And the anti-seepage geotextiles 16 can protect the slopes 3 on both sides of the roadbed, avoiding rainwater from seeping into the roadbed through the side roads. The vegetation layer 5 can fully absorb the moisture, avoiding direct contact between the rainwater and the underlying tamped soil layer 11, thereby improving the anti-seepage ability of the device.

[0035] It should be noted that: The drainage grooves 2 can be made of different materials, such as stainless steel and ultra-high performance concrete.

[0036] It should be understood that: The inserts 4 are made of aluminum alloy, which can enhance the structural stability of the roadbed and improve the earthquake resistance, wind resistance and other capabilities of the roadbed.

[0037] Finally, it should be noted that: The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A highway subgrade structure capable of preventing subgrade softening, comprising a high-efficiency subgrade water-blocking structure (1), characterized in that: The roadbed high-efficiency waterproof structure (1) comprises a rammed earth layer (11), a crushed stone layer (12), an asphalt layer (13), a glue-mixed cement layer (14), a concrete layer (15), an impermeable geotextile (16) and an arc-shaped plate layer (17); the crushed stone layer (12) is adhesively connected to the upper end of the rammed earth layer (11) for paving the bottom layer; the asphalt layer (13) is coated on the top of the glue-mixed cement layer (14); the concrete layer (15) is adhesively connected to the bottom of the glue-mixed cement layer (14); the arc-shaped plate layer (17) is inserted into the interior of the concrete layer (15); and the impermeable geotextile (16) is arranged at the bottom of the arc-shaped plate layer (17).

2. The highway subgrade structure capable of preventing subgrade softening according to claim 1, characterized in that: The anti-seepage geotextile (16) is provided in a plurality of groups, and the plurality of groups of the anti-seepage geotextile (16) are adhesively connected to the upper end of the gravel layer (12).

3. The highway subgrade structure capable of preventing subgrade softening according to claim 1, characterized in that: A plurality of drainage grooves (2) are also provided on the inner side of the bottom of the arc-shaped plate layer (17).

4. The highway subgrade structure capable of preventing subgrade softening according to claim 1, characterized in that: A side slope (3) is provided on the periphery of the roadbed high-efficiency water-blocking structure (1), and the height of the side slope (3) is less than 8 m.

5. The highway subgrade structure capable of preventing subgrade softening according to claim 1, characterized in that: A plurality of groups of embedded bodies (4) arranged at equal intervals are inserted into the interior of the adhesive-mixed cement layer (14).

6. The highway subgrade structure capable of preventing subgrade softening according to claim 2, characterized in that: The gaps in the anti-seepage geotextile (16) are also adhesively connected to a vegetation layer (5).

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