Drainage system for road-bridge transition section

Abstract

This utility model relates to the field of engineering construction technology and provides a drainage system for a bridge-road transition section. The drainage system is installed at the junction of the bridge abutment and the bridge-road transition section, and includes: a drainage board laid on the back of the bridge abutment, with the opposite side of the drainage board facing the water, and multiple drainage channels extending from top to bottom distributed on the water-facing surface; and a drainage pipe placed at the bottom of the drainage board and arranged along the direction of the drainage channels, with the bottom end of the drainage channels connected to the drainage pipe. This arrangement effectively prevents water seepage into the bridge abutment by using the drainage board on the back of the bridge abutment, and allows seepage to drain quickly from the back of the bridge abutment, protecting the bridge abutment structure from water erosion, thereby ensuring the durability and structural stability of the bridge abutment and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of engineering construction technology, and in particular to a drainage system for road and bridge transition sections. Background Technology

[0002] The bridge-road transition section refers to the transition area between the bridge and the roadbed. Specifically, it is located between the abutments at both ends of the bridge and the roadbed. The abutments are the supporting structures at both ends of the bridge, and the bridge-road transition section is the fill section connecting the back of the abutments to the roadbed, used to balance the elevation difference between the bridge and the road.

[0003] Due to their considerable height, bridge abutment back walls often face water seepage issues during construction and operation. The hydrostatic pressure generated by accumulated water increases the lateral earth pressure on the abutment back wall, potentially leading to forward tilting or slippage of the abutment. Furthermore, the increased weight of the saturated backfill can cause settlement in the road-bridge transition section behind the abutment, resulting in vehicle swaying at the bridge approach and severely impacting driving comfort. Therefore, drainage behind the abutment is crucial for ensuring driving comfort, safety, and structural durability.

[0004] In related technologies, drainage pipes or bi-directional sloping ditches are usually installed behind the abutment to ensure that the water behind the abutment is drained quickly, and drainage pipes are installed at the bottom of the backfill behind the abutment to remove seepage.

[0005] As it turns out, the drainage system described above can effectively remove water accumulation and seepage behind the abutment. However, the abutment back is usually in direct contact with the embankment area, and seepage can easily seep into the abutment structure from the embankment area, causing erosion of the abutment structure, affecting the service life and structural stability of the abutment, and increasing the later maintenance costs. Utility Model Content

[0006] This utility model provides a drainage system for the transition section of a road and bridge, which solves the defect in the prior art where water seepage easily penetrates from the back of the bridge abutment and erodes the bridge abutment structure. It can effectively prevent water seepage into the bridge abutment and quickly drain the accumulated water, protecting the bridge abutment structure from water seepage erosion, thereby ensuring the durability and stability of the bridge abutment structure and reducing maintenance costs.

[0007] This utility model provides a drainage system for road-bridge transition sections.

[0008] The drainage system, located at the junction of the bridge abutment and the road-bridge transition section, includes:

[0009] A drainage board is laid on the back of the bridge abutment. The other side of the drainage board opposite to the back of the bridge abutment is the water-facing side. Multiple drainage grooves extending from top to bottom are distributed on the water-facing side.

[0010] A drain pipe is installed at the bottom of the waterproof and drainage board and arranged along the layout direction of the drainage channel. The bottom end of the drainage channel is connected to the drain pipe for conduction.

[0011] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the drainage pipe comprises:

[0012] The pipe body has an axially extending notch on its wall;

[0013] A guide plate has one side located outside the pipe body and the other side extending into the pipe body through the notch. A guide groove is arranged on the surface of the guide plate, and the guide groove extends from outside the pipe body to inside the pipe body. The side of the guide plate with the guide groove is used to contact the water-facing side, so that the guide groove is connected to the drainage channel.

[0014] According to the present invention, a road and bridge transition section drainage system is provided, wherein the notch is offset from the axis of the pipe body and is located on the side of the pipe body relatively close to the waterproofing board.

[0015] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the guide channel is arranged on two opposite sides of the guide plate along the width direction of the notch.

[0016] According to the present invention, a road and bridge transition section drainage system is provided, wherein the guide plate is folded to form a double-layer structure along the width direction of the notch, and the fold is located outside the pipe body;

[0017] The guide grooves located at corresponding positions on both sides of the guide plate smoothly transition and connect at the fold.

[0018] According to the present invention, a road and bridge transition section drainage system is provided, wherein the notch extends along a direction parallel to the guide plate at the edge relatively away from the axis of the pipe body to form a first flange, and the first flange is used to fit against the back of the bridge abutment.

[0019] According to the present invention, in a road and bridge transition section drainage system, the notch extends along a direction parallel to the guide plate at the edge relatively close to the axis of the pipe body to form a second flange;

[0020] The guide plate is located between the first flange and the second flange and is fixedly connected to both.

[0021] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the top of the drainage channel is closed.

[0022] According to the present invention, a road and bridge transition section drainage system is provided, wherein a filter layer is provided at the joint between the drainage board and the guide plate.

[0023] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the filter layer is composed of accumulated sand particles.

[0024] According to the present invention, a road-bridge transition section drainage system is provided, wherein the side of the drainage board that is in contact with the bridge abutment is flat.

[0025] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the guide plate and the pipe body are fixedly connected by self-tapping screws.

[0026] According to the present invention, a drainage system for a road-bridge transition section is provided, wherein the top of the drainage trough is sealed with silicone.

[0027] The road-bridge transition section drainage system provided by this utility model features a drainage barrier board laid on the back of the bridge abutment. This board forms a continuous water barrier, preventing seepage water from the road-bridge transition section from penetrating into the bridge abutment. Furthermore, when seepage water reaches the water-facing side of the drainage barrier board, the drainage channels on the water-facing side guide the seepage water, allowing it to flow downwards into the drainage pipe under gravity. Finally, the water is collected and discharged through the drainage pipe, effectively preventing water accumulation on the back of the bridge abutment and further reducing the risk of water seepage into the abutment. Compared to related technologies, the drainage barrier board laid on the back of the bridge abutment effectively prevents seepage water from penetrating into the abutment and allows for rapid drainage, protecting the abutment structure from water erosion. This ensures the durability and structural stability of the abutment and reduces maintenance costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is one of the structural schematic diagrams of the road-bridge transition section drainage system provided in this embodiment of the utility model.

[0030] Figure 2 This is the second structural schematic diagram of the road-bridge transition section drainage system provided in this embodiment of the utility model.

[0031] Figure 3 This is a schematic diagram of the connection between the waterproof and drainage board and the bridge abutment provided in this embodiment of the utility model.

[0032] Figure 4 This is a schematic diagram of the structure of the drainage pipe provided in an embodiment of this utility model.

[0033] Figure 5 This is a schematic diagram of the waterproofing and drainage board and the drainage pipe provided in this embodiment of the utility model.

[0034] Figure 6This is a schematic diagram of the filter layer provided in an embodiment of the present invention.

[0035] Figure label:

[0036] 10. Bridge abutment; 20. Road-bridge transition section; 30. Waterproof and drainage board; 31. Drainage channel; 32. Fastener; 40. Drainage pipe; 41. Pipe body; 410. First flange; 411. Second flange; 42. Guide plate; 420. Guide channel; 43. Self-tapping screw; 50. Filter layer. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] To better understand the road-bridge transition section drainage system provided by this utility model, its application background is first introduced. The road-bridge transition section refers to the embankment connecting the abutment and the roadbed, mainly used to balance the elevation difference between the bridge and the road. The embankment behind the abutment often faces seepage problems during construction and operation. Eliminating accumulated and seeping water behind the abutment is crucial for ensuring driving comfort, safety, and structural durability.

[0039] In related technologies, drainage pipes or bi-directional sloping ditches are usually installed behind the abutment to ensure that the water behind the abutment is drained quickly, and drainage pipes are installed at the bottom of the backfill behind the abutment to remove seepage.

[0040] As it turns out, the drainage system described above can effectively remove water accumulation and seepage behind the abutment. However, the abutment back is usually in direct contact with the embankment area, and seepage can easily seep into the abutment structure from the embankment area, causing erosion of the abutment structure, affecting the durability and stability of the abutment, and increasing the later maintenance costs.

[0041] Against the above background, this utility model provides a road-bridge transition section drainage system that can effectively prevent seepage water from penetrating into the bridge abutment, protect the bridge abutment structure from seepage erosion, thereby ensuring the durability and structural stability of the bridge abutment and reducing maintenance costs.

[0042] The following is combined Figures 1 to 6 This invention describes the drainage system for the transition section of a road or bridge.

[0043] Reference Figure 1 and Figure 2A road-bridge transition section drainage system is provided at the junction of the back of the bridge abutment 10 and the road-bridge transition section 20. The bridge abutment 10 is a supporting structure located at the end of the bridge, and the road-bridge transition section 20 is the filling part connecting the back of the bridge abutment 10 and the roadbed. It is mainly used to balance the elevation difference between the bridge and the roadbed.

[0044] The drainage system includes a drainage board 30 and a drainage pipe 40. The drainage board 30 is laid on the back of the bridge abutment 10. The other side of the drainage board 30 opposite to the back of the bridge abutment 10 is the water-facing side. Multiple drainage channels 31 extending from top to bottom are distributed on the water-facing side. The drainage pipe 40 is set at the bottom of the drainage board 30 and arranged along the arrangement direction of the drainage channels 31. The bottom end of the drainage channel 31 is connected to the drainage pipe 40.

[0045] In practical applications, the drainage board 30 laid on the back of the bridge abutment 10 forms a continuous water barrier, preventing seepage water in the road-bridge transition section 20 from penetrating into the bridge abutment 10. Furthermore, when seepage water reaches the water-facing surface of the drainage board 30, the drainage grooves 31 on the water-facing surface guide the seepage water, allowing it to flow downwards into the drainage pipe 40 under gravity. Finally, the water is collected and discharged through the drainage pipe 40, effectively preventing water accumulation on the back of the bridge abutment 10 and further reducing the risk of water seepage into the bridge abutment 10. Compared to related technologies, the drainage board 30 laid on the back of the bridge abutment 10 effectively prevents seepage water from penetrating into the bridge abutment 10 and allows for rapid drainage, protecting the bridge abutment 10 structure from water erosion. This ensures the durability and structural stability of the bridge abutment 10 and reduces maintenance costs.

[0046] It should be noted that the specific material of the road-bridge transition section 20 can be flexibly adjusted according to actual construction needs, such as geological conditions, traffic load, environmental factors, and construction technology, so that the road-bridge transition section 20 after filling meets the required performance requirements such as structural stability, durability, and impermeability.

[0047] In a specific example of this utility model, the road-bridge transition section 20 is constructed by filling graded crushed stone mixed with 3% cement.

[0048] In some optional examples of this utility model, the drainage board 30 can be made of materials such as high-density polyethylene (HDPE) and polyvinyl chloride (PVC) to give it excellent impermeability and prevent water from penetrating into the bridge abutment 10.

[0049] Furthermore, the specific shape and size of the drainage board 30 can be cut according to actual construction needs, such as the shape and size of the back of the bridge abutment 10. The specific structural form and parameters of the drainage channel 31 on the water-facing surface can be designed according to actual needs. For example, different drainage channels 31 can be set in parallel or non-parallel, and the arrangement can be equally spaced or unequally spaced. The width of different drainage channels 31 can be equal or unequal. The number of drainage channels 31 needs to be determined based on the size of the drainage board 30 and the specific structural form and parameters of the drainage channel 31.

[0050] In a specific example of this utility model, the drainage board 30 has a rectangular structure, the drainage channel 31 extends along the width direction of the drainage board 30, different drainage channels 31 have the same width, and multiple drainage channels 31 are arranged in parallel and at equal intervals.

[0051] It should be noted that by reasonably setting the width of the drainage channel 31, a capillary structure can be formed on the water-facing surface of the drainage board 30. This, combined with capillary action, gravity drainage, and siphon effect, can achieve efficient drainage and reduce the risk of water accumulation on the back of the abutment 10.

[0052] In some optional examples, the specific forming method of the drainage channel 31 on the water-facing surface can be designed and implemented according to different technical requirements, such as integral molding or hot pressing.

[0053] More specifically, one-piece molding involves using a customized mold based on the shape requirements of the drainage channel 31. The raw material is melted at high temperature and extruded into a plate shape through the mold. After cooling and solidification, a plate with the drainage channel 31 structure is formed. Hot pressing involves heating the waterproof and drainage board 30 material (such as HDPE film) to a softening temperature to make it plastic. The softened material is then pressed into a mold, and the pressure is used to form the groove or protrusion structure of the vertical drainage channel 31. After cooling and solidification, a drainage channel 31 with a specific structure is formed on the water-facing surface of the waterproof and drainage board 30.

[0054] The forming method of the above-mentioned drainage channel 31 can be selected according to actual needs. No specific restrictions are imposed in this embodiment of the utility model. More specific parameter control in the forming process can be referred to the prior art, which will not be elaborated in this embodiment of the utility model.

[0055] In one example of this utility model, refer to Figure 2 and Figure 3 The side of the waterproofing board 30 opposite to the water-facing side, that is, the side of the waterproofing board 30 that is used to adhere to the back of the bridge abutment 10, is a flat surface, so that the waterproofing board 30 can adhere to the back of the bridge abutment 10 more smoothly and ensure the waterproof performance of the waterproofing board 30.

[0056] In one example of this utility model, the drainage board 30 is fixedly connected to the back of the bridge abutment 10 using a fastener 32. The fastener 32 can specifically be a screw, anchor, or other connecting component with a washer; no specific limitation is made in this embodiment of the utility model.

[0057] In one example of this utility model, the top of the drainage channel 31 is closed. With this configuration, after the drainage board 30 is laid, particles in the backfill soil can easily enter the drainage channel 31 through the top opening under the action of water pressure and their own weight, causing the drainage channel 31 to become blocked and affecting the drainage performance of the drainage board 30. Therefore, by closing the top opening of the drainage channel 31, it is possible to effectively prevent particles from entering the drainage channel 31 from the top, which is beneficial to ensuring the drainage performance of the drainage board 30.

[0058] Specifically, the top opening of the drainage channel 31 is sealed with silicone.

[0059] After the drainage board 30 is laid on the back of the bridge abutment 10, a drainage pipe 40 is arranged at the bottom of the drainage board 30.

[0060] In one example of this utility model, refer to Figure 4 and Figure 5 The drain pipe 40 includes a pipe body 41 and a guide plate 42; wherein, the pipe body 41 has an axially extending notch on its wall; one side of the guide plate 42 is located outside the pipe body 41, and the other side extends into the pipe body 41 through the notch; a guide groove 420 is provided on the surface of the guide plate 42, the guide groove 420 extends from the outside of the pipe body 41 to the inside of the pipe body 41, and the side of the guide plate 42 with the guide groove 420 is used to contact the water-facing side, so that the guide groove 420 is connected to the drain trough 31.

[0061] With this setup, after the drainage board 30 is laid, the drainage pipe 40 is placed at the bottom of the drainage board 30, and the pipe body 41 is arranged along the layout direction of the drainage trough 31. The side of the guide plate 42 with the guide groove 420 is in contact with the water-facing side, thereby connecting the drainage trough 31 and the guide groove 420, and then connecting the drainage trough 31 and the pipe body 41. The water guided by the drainage trough 31 enters the pipe body 41 through the guide groove 420 and collects, and finally flows out through the pipe body 41.

[0062] It should be noted that the material of the guide plate 42 and the forming method of the guide channel 420 can be referred to the waterproof plate 30, and will not be repeated here.

[0063] In one example of this invention, the notch on the pipe body 41 is offset from the axis of the pipe body 41 and located on the side of the pipe body 41 relatively close to the drainage plate 30. This arrangement allows the guide plate 42 to be as close as possible to the drainage plate 30, ensuring a tight fit between the two.

[0064] In one example of this invention, the notch extends along a direction parallel to the guide plate 42 at the edge furthest from the axis of the pipe body 41 to form a first flange 410, which is used to fit against the back of the bridge abutment 10. With this configuration, after the drainage pipe 40 is installed, the first flange 410 fits against the back of the bridge abutment 10, and a water-guiding channel is formed between the top of the first flange 410 and the bottom of the drainage plate 30. Water is guided by the drainage trough 31, enters the water-guiding channel through the bottom of the drainage trough 31, then enters the guide trough 420, and is guided into the pipe body 41. This helps to ensure the drainage efficiency of the drainage plate 30 and the drainage pipe 40.

[0065] In one example of this utility model, the notch extends along a direction parallel to the guide plate 42 at the edge of the tube body 41 that is relatively close to the axis to form a second flange 411. The first flange 410 and the second flange 411 are arranged opposite to each other to form the connection base between the tube body 41 and the guide plate 42.

[0066] Specifically, when the guide plate 42 is installed on the pipe body 41, it is located between the first flange 410 and the second flange 411. The guide plate 42 can be connected and fixed to the pipe body 41 simply by connecting the guide plate 42 to the first flange 410 and the second flange 411.

[0067] Depending on different actual needs, the guide plate 42 can be connected to the first flange 410 and the second flange 411 in a variety of ways, such as bonding or using screws or other connecting components.

[0068] In order to ensure the connection strength and stability between the guide plate 42 and the pipe body 41, in this embodiment, the guide plate 42 is fixedly connected to the first flange 410 and the second flange 411 by self-tapping screws 43.

[0069] In one example of this utility model, the guide channel 420 is arranged on both sides of the guide plate 42 along the width of the notch. With this arrangement, the guide channel 420 on one side of the guide plate 42 is in close contact with the water-facing side, realizing the connection between the drainage channel 31 and the pipe body 41, while the guide channel 420 on the other side is in direct contact with the road-bridge transition section 20. This is beneficial for draining the water accumulated at the connection between the drainage board 30 and the drainage pipe 40, and further reduces the risk of water seeping into the bridge abutment 10.

[0070] In a specific example of this utility model, the guide plate 42 is folded in half to form a double-layer structure along the width of the notch, with the fold located outside the pipe body 41; the guide grooves 420 located at corresponding positions on both sides of the guide plate 42 smoothly transition and connect at the fold. This arrangement allows the guide grooves 420 to be arranged on both sides of the guide plate 42, and when there is significant seepage, the water guided by the drainage trough 31 can be diverted at the fold, thus entering the pipe body 41 through the guide grooves 420 on both sides of the guide plate 42, which helps improve drainage efficiency.

[0071] In one example of this utility model, refer to Figure 6 A filter layer 50 is provided at the joint between the drainage board 30 and the guide plate 42. This design allows the filter layer 50 to not only filter seepage water, preventing sediment buildup and blockage of the drainage structure, but also to press between the drainage board 30 and the guide plate 42, ensuring a tight fit between them and guaranteeing the overall drainage system's effectiveness.

[0072] Specifically, the filter layer 50 consists of accumulated sand particles.

[0073] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0074] The road-bridge transition section drainage system provided in this embodiment of the invention forms a continuous water barrier by laying a drainage board 30 on the back of the bridge abutment 10, preventing seepage water in the road-bridge transition section 20 from penetrating into the bridge abutment 10. Furthermore, when seepage water reaches the water-facing surface of the drainage board 30, the drainage groove 31 on the water-facing surface guides the seepage water, allowing it to flow downwards into the drainage pipe 40 under gravity, and finally be collected and discharged by the drainage pipe 40. This effectively prevents water accumulation on the back of the bridge abutment 10, further reducing the risk of water seepage into the bridge abutment 10. Compared to related technologies, the drainage board 30 laid on the back of the bridge abutment 10 effectively prevents seepage water from penetrating into the bridge abutment 10 and allows seepage water on the back of the bridge abutment 10 to drain quickly, protecting the structure of the bridge abutment 10 from water erosion, thereby ensuring the durability and structural stability of the bridge abutment 10 and reducing maintenance costs.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drainage system for a road-bridge transition section, characterized in that, Located at the junction of the back of the bridge abutment (10) and the road-bridge transition section (20), the drainage system includes: A drainage board (30) is laid on the back of the bridge abutment (10). The other side of the drainage board (30) opposite to the bridge abutment (10) is the water-facing side. Multiple drainage grooves (31) extending from top to bottom are distributed on the water-facing side. A drain pipe (40) is placed at the bottom of the waterproof and drainage board (30) and arranged along the layout direction of the drainage channel (31). The bottom end of the drainage channel (31) is connected to the drain pipe (40).

2. The drainage system for the transition section of a road and bridge according to claim 1, characterized in that, The drain pipe (40) includes: The pipe body (41) has an axially extending notch on its wall; The guide plate (42) has one side located outside the pipe body (41) and the other side extending into the pipe body (41) through the notch. A guide groove (420) is arranged on the surface of the guide plate (42), and the guide groove (420) extends from the outside of the pipe body (41) to the inside of the pipe body (41). The side of the guide plate (42) with the guide groove (420) is used to be in contact with the water-facing side, so that the guide groove (420) is connected to the drainage trough (31).

3. The drainage system for the transition section of a road and bridge according to claim 2, characterized in that, The notch is offset from the axis of the pipe body (41) and is located on the side of the pipe body (41) relatively close to the drainage board (30).

4. The drainage system for the transition section of a road and bridge according to claim 2, characterized in that, The guide groove (420) is arranged on two opposite sides of the guide plate (42) along the width direction of the notch.

5. The drainage system for the transition section of a road and bridge according to claim 4, characterized in that, The guide plate (42) is folded to form a double-layer structure along the width of the notch, and the fold is located outside the tube body (41); The guide grooves (420) located at corresponding positions on both sides of the guide plate (42) are smoothly connected at the fold.

6. The drainage system for the transition section of a road and bridge according to any one of claims 2 to 5, characterized in that, The notch extends along a direction parallel to the guide plate (42) at the edge relatively away from the axis of the tube body (41) to form a first flange (410), which is used to fit against the back of the bridge abutment (10).

7. The drainage system for the transition section of a road and bridge according to claim 6, characterized in that, The notch extends along a direction parallel to the guide plate (42) at the edge relatively close to the axis of the tube body (41) to form a second flange (411); The guide plate (42) is located between the first flange (410) and the second flange (411) and is fixedly connected to both.

8. The drainage system for the transition section of a road and bridge according to claim 1, characterized in that, The top of the drainage channel (31) is closed.

9. The drainage system for the transition section of a road and bridge according to claim 2, characterized in that, A filter layer (50) is provided at the joint between the drainage board (30) and the guide plate (42).

10. The drainage system for the transition section of a road and bridge according to claim 9, characterized in that, The filter layer (50) is composed of stacked sand particles.

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