Dike-penetrating drainage culvert type
By installing inspection wells in areas with significant elevation differences between the riverbeds on both sides of the embankment, the structural stability and ecological issues of drainage culverts in areas of elevation difference were resolved, achieving both stable drainage and aesthetic appeal of the river.
Patent Information
- Application Number
- CN202520179808.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-05
AI Technical Summary
When existing drainage culverts are used in areas with a large difference in riverbed elevation on both sides of the embankment, there are problems such as insufficient structural stability and reduced river ecological function. Especially when the elevation difference is large, the drainage culvert has a large slope or requires the construction of large supporting retaining walls, which affects the river morphology.
The drainage culvert with a manhole in the middle is adopted. The manhole is connected to the upstream and downstream drainage culverts to eliminate the height difference between the inlet and outlet of the drainage culverts on both sides of the dike. Drainage is achieved by using the water level difference. The slope is designed to be less than or equal to 5%. Climbing ladders and covers are installed in the manholes to ensure stability and maintainability.
It achieves a balance between structural stability and river ecology in areas with large elevation differences, avoids the drainage culvert outlet being exposed during the dry season, and maintains the ecological landscape and structural stability of the river.
Smart Images
Figure CN223867167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy engineering dike drainage technology, specifically to a type of drainage culvert that penetrates a dike. Background Technology
[0002] Drainage culverts are the most common drainage structures in flood control and drainage projects. They are mainly used to divert water from the relatively low-lying areas on both sides of the dike to the river channel to reduce the occurrence of waterlogging. At present, drainage culverts in the project are mostly built in areas where the difference in riverbed elevation is small on both sides of the dike. Generally, drainage circular culverts or box culverts are used to directly connect the two banks with a small slope. Due to the varied topography on both sides of the dike, the following problems are likely to occur when using the existing technical solution in areas where the difference in riverbed elevation is large on both sides of the dike: (1) If the inlet and outlet of the drainage culvert are connected to the bottom of the waterlogged area and the bottom of the river channel respectively, the overall slope of the drainage culvert is large, the structural stability cannot be guaranteed, and the water flow is poor, which can easily cause scouring, such as Figure 1 As shown in the figure; (2) If, in order to ensure the overall stability of the drainage culvert, the outlet of the drainage culvert is buried in the middle of the embankment, then a large supporting retaining wall needs to be built at the outlet. This will change the cross-sectional shape of the river channel, reduce the ecological nature of the river channel, and during the dry season, the outlet of the drainage culvert and the hardened retaining wall will be exposed above the water surface, resulting in a poor visual effect, such as Figure 2 As shown in the image.
[0003] Therefore, this patent application is filed. Summary of the Invention
[0004] The purpose of this utility model is to provide a type of drainage culvert that penetrates the dike, aiming to solve the problem that existing drainage culverts are not suitable for use when there is a large height difference between the riverbanks on both sides. The drainage culvert type of this utility model adopts the method of setting an inspection well in the middle to eliminate the height difference between the inlet and outlet of the drainage culvert on both sides of the dike, which can not only meet the structural safety and stability, but also ensure the ecological landscape of the river while solving the drainage problem.
[0005] This utility model is achieved through the following technical solution:
[0006] The purpose of this utility model is to provide a type of drainage culvert that penetrates a dike, including an upstream drainage culvert, a downstream drainage culvert, and a manhole. The manhole is located between the upstream and downstream drainage culverts. The outlet of the upstream drainage culvert is connected to the manhole, and the inlet of the downstream drainage culvert is connected to the manhole. The height of the outlet of the upstream drainage culvert is higher than the height of the inlet of the downstream drainage culvert.
[0007] In an optional embodiment, the outlet of the upstream drainage culvert and the inlet of the downstream drainage culvert are both embedded in the sidewall of the inspection well and connected thereto, and the slopes of the upstream and downstream drainage culverts are both less than or equal to 5%.
[0008] In an optional embodiment, the slope of both the upstream and downstream drainage culverts is 0%.
[0009] In an alternative embodiment, the inspection well is equipped with a climbing ladder.
[0010] In an optional embodiment, the inspection well is provided with a cover plate on top to close the inspection well, and the cover plate is openable and closable.
[0011] In an optional embodiment, the elevation of the top of the inspection well is consistent with the elevation of the designed embankment top, which is located in the earthwork filling.
[0012] In an optional embodiment, an inlet retaining wall is provided at the inlet of the upstream drainage culvert, and an outlet retaining wall is provided at the outlet of the downstream drainage culvert.
[0013] In an optional embodiment, the inlet retaining wall is fixedly embedded within the bottom elevation of the flood-prone area, and the outlet retaining wall is fixedly embedded within the bottom elevation of the river channel.
[0014] In an optional embodiment, earthwork filling is provided above the upstream drainage culvert and the inlet retaining wall, and the downstream drainage culvert and the outlet retaining wall.
[0015] In an optional embodiment, backfill medium sand is provided on both sides of the inspection well, and the volume of backfill medium sand near the upstream drainage culvert is larger than that of backfill medium sand near the downstream drainage culvert.
[0016] The advantages and beneficial effects of this utility model compared to the prior art are:
[0017] This utility model provides a drainage culvert design that combines a monitoring well with upstream and downstream drainage culverts. During use, due to the water level difference between the two sides of the dike (the flooded area and the river channel), floodwater from the flooded area first enters the upstream drainage culvert. Driven by gravity and water pressure, the floodwater enters the monitoring well. When the water level in the monitoring well is higher than the water level in the river channel, the excess water in the monitoring well flows into the river channel through the downstream drainage culvert, thus achieving flood drainage. By using a monitoring well in the middle of the upstream and downstream drainage culverts, the height difference between the inlet and outlet of the drainage culverts on both sides of the dike can be eliminated, achieving drainage without increasing the slope of the drainage culverts. This structure has strong stability, and even during the dry season, the outlet of the downstream drainage culvert will not be exposed. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0019] Figure 1 This is a type of drainage culvert in the existing technology;
[0020] Figure 2 This is another type of drainage culvert in the existing technology;
[0021] Figure 3 This is a schematic diagram of a novel drainage culvert structure provided for an embodiment of the present utility model.
[0022] In the diagram: 1-Drainage culvert A, 2-Drainage culvert B, 3-Upstream drainage culvert, 4-Downstream drainage culvert, 5-Inspection well, 6-Elevation of the flood-prone area, 7-Elevation of the riverbed, 8-Climbing ladder, 9-Cover plate, 10-Earthwork filling, 11-Inlet retaining wall, 12-Outlet retaining wall, 13-Backfill medium sand, 14-Design embankment top. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0024] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring the present invention.
[0025] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0026] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0027] Currently, in drainage areas where the difference in riverbed elevation between the two sides of the dike is small, drainage culverts are mostly constructed using circular or box culverts with a gentle slope to directly connect the two banks. This technology is difficult to apply in areas where the difference in riverbed elevation between the two sides of the dike is large, and the following problems are likely to occur:
[0028] First, if the inlet and outlet of the drainage culvert connect to the riverbed on both sides of the embankment, the culvert has a large slope, insufficient overall structural stability, and poor water flow, making it prone to erosion; as shown in the attached... Figure 1 As shown, inlet and outlet retaining walls 12 are installed on both sides of drainage culvert A1. Due to the significant difference in riverbed elevation on both sides of the embankment, the slope of drainage culvert A1 is relatively large, resulting in overall structural instability. Figure 1 As shown in the image.
[0029] Secondly, if the outlet of drainage culvert B2 is buried in the middle of the embankment to ensure the overall stability of the drainage culvert structure, a large supporting retaining wall needs to be built at the outlet of drainage culvert B2. However, this design changes the cross-sectional shape of the river channel, reduces the ecological integrity of the river channel, and during the dry season, the outlet of drainage culvert B2 and the hardened retaining wall will be exposed above the water, resulting in a poor visual effect. Figure 2 As shown in the image.
[0030] To address the above issues, this embodiment provides a novel type of drainage culvert structure that can be applied to flood-prone areas with significant differences in riverbed elevation on both sides of the dike. This structure can meet the requirements for structural safety and stability while ensuring the ecological landscape of the river channel.
[0031] like Figure 3 As shown in the figure, the drainage culvert type of this embodiment includes an upstream drainage culvert 3, a downstream drainage culvert 4, and a manhole 5. The upstream drainage culvert 3 is close to the bottom elevation 6 of the flooded area, the downstream drainage culvert 4 is close to the bottom elevation 7 of the river channel, and the manhole 5 is located between the upstream drainage culvert 3 and the downstream drainage culvert 4. The outlet of the upstream drainage culvert 3 is connected to the manhole 5, and the inlet of the downstream drainage culvert 4 is connected to the manhole 5. The height of the outlet of the upstream drainage culvert 3 is higher than the height of the inlet of the downstream drainage culvert 4.
[0032] This embodiment combines a monitoring well with upstream and downstream drainage culverts 4. During operation, due to the water level difference between the two sides of the dike (the flooded area and the river channel), floodwater from the flooded area first enters the upstream drainage culvert 3. Driven by gravity and water pressure, the floodwater enters the monitoring well 5. When the water level in the monitoring well 5 is higher than the water level in the river channel, the excess water in the monitoring well 5 flows into the river channel through the downstream drainage culvert 4, thus achieving flood drainage. By placing the monitoring well 5 in the middle of the upstream and downstream drainage culverts 4, the height difference between the inlet and outlet of the drainage culverts on both sides of the dike can be eliminated, achieving drainage without increasing the slope of the drainage culverts. This structure has strong stability, and even during the dry season, the outlet of the downstream drainage culvert 4 will not be exposed.
[0033] Furthermore, the outlet of the upstream drainage culvert 3 and the inlet of the downstream drainage culvert 4 are both embedded in the side wall of the inspection well 5 and connected. The slopes of the upstream drainage culvert 3 and the downstream drainage culvert 4 are both less than or equal to 5%. Better yet, the slopes of the upstream drainage culvert 3 and the downstream drainage culvert 4 are both designed to be 0%, thereby ensuring structural stability and controlling the water flow velocity.
[0034] To prevent the manhole 5 from accumulating silt after long-term use and reducing the drainage capacity of the culvert, in one possible design, a climbing ladder 8 can be installed inside the manhole 5. The ladder can be made of steel, which can meet the needs of maintenance and dredging inside the manhole. Furthermore, to ensure safety, a cover plate 9 is installed on the top of the manhole 5 to close the manhole 5. The cover plate 9 can be opened and closed.
[0035] In order to reduce the height difference between the outlet of the upstream drainage culvert 3 and the inlet of the downstream drainage culvert 4, the top elevation of the manhole is consistent with the top elevation of the designed embankment 14, and the bottom elevation of the manhole is determined by comprehensively considering the design slope of the drainage culvert, the length of the drainage culvert and the bottom elevation of the riverbed 7; the top elevation of the manhole is consistent with the top elevation of the designed embankment 14, and the designed embankment 14 is located in the earthwork filling 10.
[0036] An inlet retaining wall 11 is installed at the inlet of the upstream drainage culvert 3, and an outlet retaining wall 12 is installed at the outlet of the downstream drainage culvert 4. The inlet retaining wall 11 is fixedly embedded within the bottom elevation 6 of the flood-prone area, and the outlet retaining wall 12 is fixedly embedded within the bottom elevation 7 of the river channel, ensuring the stability of the drainage culverts and the riverbank. Earthwork fill 10 is installed above the upstream drainage culvert 3 and the inlet retaining wall 11, and above the downstream drainage culvert 4 and the outlet retaining wall 12. Backfill medium sand 13 is installed on both sides of the inspection well 5. The volume of the backfill medium sand 13 closer to the upstream drainage culvert 3 is larger than that closer to the downstream drainage culvert 4, which can reduce the settlement of the drainage culverts on both sides.
[0037] This utility model uses a novel drainage culvert to discharge floodwater from the area behind the dike (the flood-prone area) into the river channel, reducing the losses caused by long-term flooding behind the dike. After flooding occurs behind the dike, due to the difference in water level on both sides of the dike (the flood-prone area and the river channel), the floodwater in the flood-prone area first enters the upstream drainage culvert 3. Driven by gravity and water pressure, the floodwater enters the inspection well 5. When the water level in the inspection well 5 is higher than the water level in the river channel, the excess water in the inspection well 5 enters the river channel through the downstream drainage culvert 4 under the influence of the water level difference, thereby achieving the function of flood drainage.
[0038] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A type of drainage culvert that penetrates a dike, characterized in that, It includes an upstream drainage culvert (3), a downstream drainage culvert (4), and a manhole (5). The manhole (5) is located between the upstream drainage culvert (3) and the downstream drainage culvert (4). The outlet of the upstream drainage culvert (3) is connected to the manhole (5), and the inlet of the downstream drainage culvert (4) is connected to the manhole (5). The height of the outlet of the upstream drainage culvert (3) is higher than the height of the inlet of the downstream drainage culvert (4).
2. The type of drainage culvert through a dike according to claim 1, characterized in that, The outlet of the upstream drainage culvert (3) and the inlet of the downstream drainage culvert (4) are both embedded in the side wall of the inspection well (5) and connected. The slopes of the upstream drainage culvert (3) and the downstream drainage culvert (4) are both less than or equal to 5%.
3. The type of drainage culvert through a dike according to claim 1, characterized in that, The slopes of both the upstream drainage culvert (3) and the downstream drainage culvert (4) are 0%.
4. A type of drainage culvert through a dike according to any one of claims 1 to 3, characterized in that, The inspection well (5) is equipped with a climbing ladder (8).
5. A type of drainage culvert through a dike according to claim 4, characterized in that, The top of the inspection well (5) is provided with a cover plate (9) to close the inspection well (5), and the cover plate (9) can be opened and closed.
6. A type of drainage culvert through a dike according to claim 5, characterized in that, The top elevation of the inspection well (5) is consistent with the elevation of the designed embankment top, which is located in the earthwork filling (10).
7. A type of drainage culvert through a dike according to claim 5 or 6, characterized in that, The upstream drainage culvert (3) is provided with an inlet retaining wall (11) at its inlet, and the downstream drainage culvert (4) is provided with an outlet retaining wall (12) at its outlet.
8. A type of drainage culvert through a dike according to claim 7, characterized in that, The inlet retaining wall (11) is fixedly embedded in the bottom elevation (6) of the flood-prone area, and the outlet retaining wall (12) is fixedly embedded in the bottom elevation (7) of the river channel.
9. A type of drainage culvert through a dike according to claim 8, characterized in that, Earthwork filling (10) is provided above the upstream drainage culvert (3) and the inlet retaining wall (11), and the downstream drainage culvert (4) and the outlet retaining wall (12).
10. A type of drainage culvert through a dike according to claim 8 or 9, characterized in that, Both sides of the inspection well (5) are provided with backfill medium sand, and the volume of the backfill medium sand near the upstream drainage culvert (3) is larger than that of the backfill medium sand near the downstream drainage culvert (4).