Bridgehead highway subgrade structure

Abstract

The utility model relates to the field of highway subgrades, in particular to a bridgehead highway subgrade structure which comprises a sewer, an inclined surface concrete layer and a water seepage chamber, the top of the sewer is fixedly connected to the top of an asphalt pavement, and one end of the sewer penetrates through the asphalt pavement and the inclined surface concrete layer to be fixedly connected into a subgrade. The bottom of the slope concrete layer is fixedly connected with one side of the top of a steel mesh structure, a water seepage chamber is formed between the steel mesh structure and a sewer, the bottom of the water seepage chamber is fixedly connected with a partition plate, the two sides of the partition plate are fixedly connected with the outer side of the sewer respectively, and a water outlet is formed in the bottom of the partition plate. The drainage opening is formed outside the sewer, gravels driven by water flow can be blocked by the steel mesh structure, the water flow penetrates through the steel mesh to enter the water seepage chamber, enters the drainage opening of the sewer through secondary filtration of the leakage plate, enters the sewer through the drainage opening and is discharged, and the situation that the water flow continues to permeate downwards is avoided.

Description

Technical Field

[0001] The utility model relates to the field of highway roadbeds, in particular to a bridgehead highway roadbed structure. Background Art

[0002] The roadbed is a rock and soil structure excavated or filled on the natural surface according to the design linearity (position) and design cross-section (geometric dimensions) requirements of the route. It is the foundation of the road surface and bears the traffic load transmitted from the road surface. The main engineering structures of the highway are the roadbed and the road surface.

[0003] At present, the roadbed of bridgehead highways is mostly located at both ends of the highway, but the soil of the roadbed of bridgehead highways is relatively moist and has a high water content, which can easily lead to various phenomena such as roadbed sinking and backflow. In addition, during the rainy season, the arch bridge will drain water to the bridgeheads at both ends, and the water will enter the roadbed from both sides of the highway ramp, causing water accumulation inside the roadbed and causing the roadbed to sink again. Utility Model Content

[0004] The purpose of the utility model is to provide a bridgehead highway roadbed structure to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a bridgehead highway roadbed structure, including a sewer, a sloped concrete layer and a seepage chamber, the top of the sewer is fixedly connected to the top of the asphalt pavement, one end of the sewer passes through the asphalt pavement and is fixedly connected to the inside of the roadbed with the sloped concrete layer, the sloped concrete layer is at the bottom of the asphalt pavement, the bottom of the sloped concrete layer is fixedly connected to one side of the top of a steel mesh structure, a seepage chamber is formed between the steel mesh structure and the sewer, the bottom of the seepage chamber is fixedly connected to a partition, both sides of the partition are respectively fixedly connected to the outside of the sewer, a drain outlet is provided at the bottom of the partition, and the drain outlet is opened on the outside of the sewer.

[0006] Preferably, the side of the partition away from the sewer is fixedly connected to the side of the stepped concrete layer, the top of the partition is fixedly connected to a plurality of support columns, the top of the support columns is fixedly connected to the bottom of the inclined concrete layer, and a steel mesh structure is provided on one side of the support columns.

[0007] Preferably, a gravel filling layer A is provided in the space between the steel mesh structure and the sloped concrete layer. The gravel filling layer A is compacted and laid inside the steel mesh structure. The bottom of the steel mesh structure is fixedly connected to the top of the stepped concrete layer. A number of steel pillars are fixedly connected inside the stepped concrete layer.

[0008] Preferably, the bottom end of the steel support pillar passes through the lime layer A and the gravel filling layer B and is fixedly connected to the inside of the soft mud filling layer. The lime layer A is laid at the bottom of the stepped concrete layer, and the lime layer A is located on the top of the gravel filling layer B.

[0009] Preferably, the gravel filling layer B is compacted and laid on top of the lime layer B, the lime layer B is located on top of the soft mud filling layer, and the lime layer B and the inside of the soft mud filling layer both fit the outside of the sewer.

[0010] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0011] First, the utility model provides a bridgehead highway subgrade structure that can facilitate subgrade drainage through its arrangement. Rainwater flows through the inclined surfaces of the bridgeheads at both ends of the bridge toward one side of the highway. Part of the water flows into the sewer and is discharged, while the other part of the water flows through the ramps on both sides of the asphalt pavement and penetrates into the inclined concrete layer. As the water flows continuously, the water flowing into the inclined concrete layer will penetrate into the gravel filling layer A. Since the gravel filling layer A is in the shape of an inclined surface, the water will flow from top to bottom. A steel mesh structure is provided at the bottom end of the gravel filling layer A. The steel mesh structure protects and fixes the gravel filling layer A. The gravel driven by the water flow will be blocked by the steel mesh structure. The water flows through the steel mesh into the seepage chamber. The water flows through the secondary filtration of the leak plate into the sewer outlet of the sewer, and is discharged into the sewer through the sewer outlet, thereby preventing the water flow from continuing to penetrate downward. This arrangement has a discharge function for the infiltrated rainwater, thereby preventing the rainwater from continuously penetrating and damaging the subgrade structure.

[0012] Second, the utility model provides a bridgehead highway roadbed structure that can support the road surface through its setting. In order to prevent the hollow inside the seepage chamber from affecting the passage of vehicles on the asphalt road surface, a number of support columns are arranged on the top of the leak plate to support the inclined concrete and asphalt road surface. When the water flows through the steel mesh structure, it will still take away some sand and gravel, and the sand and gravel will be filtered in the seepage chamber to fill the seepage chamber and increase the support on the top of the seepage chamber. At the same time, the stepped concrete layer at the bottom of the steel mesh structure also supports the asphalt road surface. The stepped concrete layer disperses the supporting force of the asphalt road surface and is easier to support than the flat concrete layer, thereby avoiding the sinking of the asphalt road surface caused by gravity compression. A number of steel bars are arranged inside the stepped concrete layer, which in turn reduces the supporting force of the stepped concrete layer, so that the force on the asphalt road surface is dispersed to various structures of the roadbed, reducing the supporting pressure of the concrete layer and effectively slowing down the sinking of the asphalt road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of a bridgehead highway subgrade structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of a sewer of a bridgehead highway subgrade structure of the utility model;

[0015] Figure 3 The utility model is a structural diagram of a partition of a bridgehead highway subgrade structure.

[0016] Among them: 1. sewer; 101. sewer outlet; 2. sloped concrete layer; 3. asphalt pavement; 4. seepage chamber; 5. support column; 6. leak plate; 7. steel mesh structure; 8. gravel filling layer A; 9. stepped concrete layer; 10. steel support pillar; 11. lime layer A; 12. gravel filling layer B; 13. lime layer B; 14. soft mud filling layer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 A bridgehead highway subgrade structure comprises a sewer 1, a sloped concrete layer 2 and a seepage chamber 4, wherein the top of the sewer 1 is fixedly connected to the top of an asphalt pavement 3, one end of the sewer 1 passes through the asphalt pavement 3 and is fixedly connected to the inside of the subgrade with the sloped concrete layer 2, the sloped concrete layer 2 is at the bottom of the asphalt pavement 3, the bottom of the sloped concrete layer 2 is fixedly connected to one side of the top of a steel mesh structure 7, a seepage chamber 4 is formed between the steel mesh structure 7 and the sewer 1, the bottom of the seepage chamber 4 is fixedly connected to a leak plate 6, both sides of the leak plate 6 are respectively fixedly connected to the outside of the sewer, a drain port 101 is arranged at the bottom of the leak plate 6, the drain port 101 is opened outside the sewer 1, rainwater flows to one side of the highway through the slope of the bridgeheads at both ends of the bridge, part of the water flows into the sewer 3 and is discharged, and the other part The divided water flow penetrates into the sloped concrete layer 2 through the ramps on both sides of the asphalt pavement 1. As the water flow continues to flow, the water flow entering the sloped concrete layer 2 will penetrate into the gravel filling layer A8. Since the gravel filling layer A8 is in a slope shape, the water flow will flow from top to bottom. A steel mesh structure 7 is provided at the bottom end of the gravel filling layer A8. The steel mesh structure 7 protects and fixes the gravel filling layer A8. The gravel driven by the water flow will be blocked by the steel mesh structure 7. The water flow passes through the steel mesh and enters the seepage chamber 4. The water flow enters the drain port 301 of the sewer 3 through the secondary filtration of the leak plate 6, and enters the sewer 3 through the drain port 301 for discharge, so as to prevent the water flow from continuing to penetrate downward. This arrangement has a discharge function for the infiltrated rainwater, so as to prevent the rainwater from continuously penetrating and damaging the roadbed structure.

[0019] Specifically, the side of the leak plate 6 away from the sewer 1 is fixedly connected to the side of the stepped concrete layer 9, the top of the leak plate 6 is fixedly connected to several support columns 5, the top of the support column 5 is fixedly connected to the bottom of the inclined concrete layer 2, and a steel mesh structure 7 is provided on one side of the support column 5.

[0020] Through the above technical scheme, in order to avoid the hollow inside of the seepage chamber 4 affecting the passage of vehicles on the asphalt pavement 1, a number of support columns 5 are provided on the top of the leak plate 6 to support the slope concrete 2 and the asphalt pavement 1. When the water flows through the steel mesh structure 7, it will still carry away some sand and gravel, and the sand and gravel will be filtered in the seepage chamber 4, filling the seepage chamber 4 and increasing the support of the top of the seepage chamber 4.

[0021] Specifically, a gravel filling layer A8 is provided in the space between the steel mesh structure 7 and the sloped concrete layer 2. The gravel filling layer A8 is compacted and laid inside the steel mesh structure 7. The bottom of the steel mesh structure 7 is fixedly connected to the top of the stepped concrete layer 9. A number of steel pillars 10 are fixedly connected inside the stepped concrete layer 9.

[0022] Through the above technical solution, the stepped concrete layer 9 at the bottom of the steel mesh structure 7 also supports the asphalt pavement. The stepped concrete layer 9 disperses the supporting force of the asphalt pavement 1 and is easier to support than a flat concrete layer, thereby avoiding the sinking of the asphalt pavement 1 caused by gravity compression.

[0023] Specifically, the bottom end of the steel support column 10 passes through the lime layer A11 and the gravel filling layer B12 and is fixedly connected to the inside of the soft mud filling layer 14. The lime layer A11 is laid at the bottom of the stepped concrete layer 9, and the lime layer A11 is located on the top of the gravel filling layer B12.

[0024] Through the above technical scheme, a number of steel pillars 10 are arranged inside the stepped concrete layer 9, which in turn reduce the supporting force of the stepped concrete layer 9, so that the force of the asphalt pavement 1 is dispersed to various structures of the roadbed, reducing the supporting pressure of the concrete layer and effectively slowing down the sinking of the asphalt pavement 1.

[0025] Specifically, the crushed stone filling layer B12 is compacted and laid on the top of the lime layer B13 , the lime layer B13 is located on the top of the soft mud filling layer 14 , and the lime layer B13 and the inside of the soft mud filling layer 14 both fit the outside of the sewer 1 .

[0026] Through the above technical scheme, a lime layer A11 is provided at the bottom of the step concrete layer 9, and the lime layer A11 absorbs the moisture in the step concrete layer 9 to prevent the moisture in the step concrete layer 9 from continuing to seep in, while preventing the soft mud filling layer 14 at the bottom of the gravel filling layer 12 from backflowing. A lime layer B13 is provided on the top of the soft mud filling layer 14 for prevention.

[0027] When in use, rainwater flows through the slopes of the bridgeheads at both ends of the bridge to the side of the road. Part of the water flows into the sewer 3 for discharge, and the other part of the water flows through the ramps on both sides of the asphalt pavement 1 and penetrates into the sloped concrete layer 2. As the water flows continuously, the water entering the sloped concrete layer 2 will penetrate into the gravel filling layer A8. Since the gravel filling layer A8 is in a slope shape, the water will flow from top to bottom. A steel mesh structure 7 is provided at the bottom of the gravel filling layer A8 to protect and fix the gravel filling layer A8. The driven gravel will be blocked by the steel mesh structure 7, and the water flows through the steel mesh into the seepage chamber 4. The water flows through the secondary filtration of the leak plate 6 and enters the sewer port 301 of the sewer 3, and is discharged from the sewer 3 through the sewer port 301. In order to prevent the hollow inside of the seepage chamber 4 from affecting the passage of vehicles on the asphalt pavement 1, a number of support columns 5 are provided on the top of the leak plate 6 to support the inclined concrete 2 and the asphalt pavement 1. When the water flows through the steel mesh structure 7, it will still carry away some gravel, and the gravel will be filtered in the seepage chamber. 4, the seepage chamber 4 is filled to increase the support of the top of the seepage chamber 4, and at the same time, the stepped concrete layer 9 at the bottom of the steel mesh structure 7 also supports the asphalt pavement. The stepped concrete layer 9 disperses the supporting force of the asphalt pavement 1 and is easier to support than the flat concrete layer, thereby preventing the asphalt pavement 1 from sinking due to gravity compression. A number of steel support pillars 10 are arranged inside the stepped concrete layer 9, and the steel support pillars 10 further reduce the supporting force of the stepped concrete layer 9. A lime layer A1 is arranged at the bottom of the stepped concrete layer 9. 1. The lime layer A11 absorbs the moisture in the stepped concrete layer 9 to prevent the moisture in the stepped concrete layer 9 from continuously infiltrating, and at the same time prevents the soft mud filling layer 14 at the bottom of the crushed stone filling layer 12 from backflowing. A lime layer B13 is provided on the top of the soft mud filling layer 14 for prevention. This arrangement has a discharge function for the infiltrated rainwater, prevents the continuous infiltration of rainwater and damage to the roadbed structure, and at the same time disperses the force of the road surface to various structures of the roadbed, reduces the supporting pressure of the concrete layer, and effectively slows down the sinking of the road surface.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bridgehead highway subgrade structure, comprising a sewer (1), a sloped concrete layer (2) and a water seepage chamber (4), Features: The top of the sewer (1) is fixedly connected to the top of the asphalt pavement (3); one end of the sewer (1) passes through the asphalt pavement (3) and is fixedly connected to the inside of the roadbed with the inclined concrete layer (2); the inclined concrete layer (2) is at the bottom of the asphalt pavement (3); the bottom of the inclined concrete layer (2) is fixedly connected to one side of the top of the steel mesh structure (7); a water seepage chamber (4) is formed between the steel mesh structure (7) and the sewer (1); the bottom of the water seepage chamber (4) is fixedly connected to a leak plate (6); both sides of the leak plate (6) are respectively fixedly connected to the outside of the sewer (1); a drain port (101) is provided at the bottom of the leak plate (6); and the drain port (101) is opened outside the sewer (1).

2. A bridgehead highway subgrade structure according to claim 1, Features: The side of the leak plate (6) away from the sewer (1) is fixedly connected to the side of the stepped concrete layer (9), the top of the leak plate (6) is fixedly connected to a plurality of support columns (5), the top of the support column (5) is fixedly connected to the bottom of the inclined concrete layer (2), and a steel mesh structure (7) is provided on one side of the support column (5).

3. A bridgehead highway subgrade structure according to claim 2, Features: A crushed stone filling layer A (8) is provided in the space between the steel mesh structure (7) and the sloped concrete layer (2); the crushed stone filling layer A (8) is compacted and laid inside the steel mesh structure (7); the bottom of the steel mesh structure (7) is fixedly connected to the top of the stepped concrete layer (9); and a plurality of steel support pillars (10) are fixedly connected inside the stepped concrete layer (9).

4. A bridgehead highway subgrade structure according to claim 3, Features: The bottom end of the steel support column (10) passes through the lime layer A (11) and the gravel filling layer B (12) and is fixedly connected to the inside of the soft mud filling layer (14); the lime layer A (11) is laid at the bottom of the stepped concrete layer (9), and the lime layer A (11) is located on the top of the gravel filling layer B (12).

5. A bridgehead highway subgrade structure according to claim 4, Features: The crushed stone filling layer B (12) is compacted and laid on top of the lime layer B (13), and the lime layer B (13) is located on top of the soft mud filling layer (14). The lime layer B (13) and the inside of the soft mud filling layer (14) are both in contact with the outside of the sewer (1).

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