Rain and sewage intersection well structure crossing roadside box culvert
By setting up a manifold structure at the intersection of the road culvert and the sewage pipe, the conflict problem of the cross-layout of rainwater and sewage pipelines was solved, achieving safe and economical separation of rainwater and sewage, and ensuring the independent operation and efficient drainage of each system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA POWER CONSTR EAST CHINA SURVEY DESIGN & RES INST (ZHENGZHOU) CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-10
AI Technical Summary
In existing urban drainage systems, it is difficult to vertically stagger storm and sewage pipelines when they intersect, creating conflict points that lead to environmental pollution and increased burden on the drainage system. A storm and sewage manifold structure that is structurally safe, reliable, easy to construct, and economically reasonable is needed to solve this problem.
A manifold structure is installed at the intersection of the road culvert and the sewage pipe. The sewage pipe is allowed to cross the manifold structure by setting installation ports on both sides of the manifold structure. The gaps are sealed with waterproof parts to ensure that the sewage pipe crosses independently without interfering with the flow of rainwater and to maintain the gravity flow characteristics of each system.
It enables rainwater and sewage to safely pass through space without affecting existing drainage capacity, ensuring the independent operation of each system, reducing engineering costs and operation and maintenance complexity, and improving the utilization rate of underground space and drainage efficiency.
Smart Images
Figure CN224478534U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal drainage technology, and in particular to a stormwater and sewage confluence structure that crosses a road culvert. Background Technology
[0002] With the rapid urbanization in my country, the increasing urban population has rendered existing urban drainage systems inadequate for current operational needs, leading to increasingly prominent urban drainage problems. Many cities initially opted for combined sewer systems to save on investment, resulting in the mixing of rainwater and sewage. This not only increases the burden on municipal wastewater treatment plants but also easily leads to environmental pollution. Therefore, implementing rainwater and sewage separation projects has become crucial for solving urban drainage problems.
[0003] Rainwater and sewage separation is a crucial component of water supply and drainage engineering, playing a vital role in improving urban drainage capacity and protecting the water environment. However, with climate change, drainage and flood control facilities need continuous expansion, and rainwater facilities are becoming increasingly larger, often arranged in culvert form. These facilities frequently intersect with existing sewage pipes, leading to a growing number of such intersections. Due to the strict elevation control requirements of gravity flow systems, it is often difficult to achieve vertical separation between rainwater and sewage pipelines at intersections, creating "conflict points."
[0004] Therefore, there is an urgent need for a stormwater and sewage mixing well structure that is structurally safe and reliable, easy to construct, convenient to maintain, and economical, in order to solve problems such as passage obstacles when stormwater and sewage are arranged in a cross pattern, and to provide strong support for the upgrading and refined management of urban drainage systems. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide a stormwater and sewage mixing well structure that crosses a road culvert, in view of the above-mentioned problems.
[0006] The technical solution adopted by this utility model is: a stormwater and sewage mixing well structure for passing through a road culvert, comprising:
[0007] The junction well structure is located between two sections of road box culverts, with corresponding road box culverts at both ends. The inner walls of the well on both sides of the structure are provided with installation openings on the same axis.
[0008] The sewage pipe is installed in the installation openings on both sides, allowing the sewage pipe to cross the manifold structure through the installation openings;
[0009] A waterproof fitting is installed between the inner wall of the installation port and the outer wall of the sewage pipe to seal the gap between the installation port and the sewage pipe.
[0010] By employing the aforementioned technical means, a manifold structure is added as a transition structure when a road culvert intersects with a sewage pipe. A pair of installation ports are set on the inner wall of the manifold structure, through which the sewage pipe passes. Waterproof components are used to seal the gap between the installation port and the sewage pipe. Thus, by setting up the manifold structure, the sewage pipe can pass through the road culvert independently without interfering with the rainwater flow inside the road culvert, ensuring the gravity flow characteristics of each system.
[0011] In some embodiments, the junction well structure is a rectangular box structure with a top plate at the top and a bottom plate at the bottom, and an inspection well communicating with the ground is provided inside the junction well structure.
[0012] In some embodiments, a concrete pad is provided at the bottom of the base plate, and the planar dimensions of the concrete pad are not less than the planar dimensions of the base plate.
[0013] In some embodiments, the base plate is provided with a sedimentation tank, and the water-facing side wall of the sedimentation tank is provided with a slope.
[0014] In some embodiments, the inspection well includes a well cylinder, a well base, a well cover, and a ladder. The top of the top plate is provided with a well cylinder that can connect to the ground. The inner wall of the well cylinder is connected to the inner wall of the well chamber on the same vertical plane. A well base is provided at the junction of the top of the well cylinder and the ground. A matching well cover is installed on the well base. A ladder extending into the interior of the confluence well structure is provided on the inner wall of the well cylinder.
[0015] In some embodiments, the manifold structure is provided with a protective beam located on the water-facing side of the sewage pipe. The two ends of the protective beam are respectively connected to the inner walls of the two sides of the manifold structure. The protective beam and the sewage pipe are at the same horizontal height, and the height of the protective beam is not less than the diameter of the sewage pipe. The water-facing surface of the protective beam is set as an arc surface, so that the protective beam can reduce the impact of water flow on the sewage pipe.
[0016] In some embodiments, the two sidewalls of the junction well structure are widened and connected sequentially to the two end culverts.
[0017] In some embodiments, the sewage pipe is made of ductile iron.
[0018] In some embodiments, the waterproof component is a rigid waterproof sleeve, which is disposed between the installation port and the sewage pipe.
[0019] The beneficial effects of this utility model are:
[0020] 1. By setting up a manifold structure as a transition structure at the intersection of the road culvert and the sewage pipe, each end of the manifold structure connects to the road culvert. A pair of installation ports are set on the inner walls of both sides of the manifold structure, allowing the sewage pipe to pass through. Waterproof fittings are used to seal the gap between the installation ports and the sewage pipe. Without damaging the existing culvert structure or affecting the existing drainage capacity, the manifold structure is rationally designed as a junction point for rainwater and sewage, ensuring safe spatial passage and non-interference in function between the two systems. This improves the utilization rate of underground space, not only avoiding interference with rainwater flow within the road culvert but also ensuring the gravity flow characteristics of each system. Attached Figure Description
[0021] Figure 1 This is a structural diagram of this application.
[0022] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.
[0023] Figure 3 yes Figure 1 Cross-sectional view along the BB direction.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Sewage pipe; 2. Waterproof sleeve; 3. Well shaft; 4. Ladder; 5. Protective beam; 6. Well cover; 7. Ground; 8. Sedimentation trough; 9. Base slab; 10. Top slab; 11. Well base; 12. Inner wall of the well chamber; 13. Crossing box culvert; 14. Concrete foundation.
[0026] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.
[0027] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.
[0028] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed Implementation
[0029] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.
[0030] Combination Figures 1 to 3As shown, this embodiment is a stormwater and sewage manifold structure passing through a road culvert, including a manifold structure, a sewage pipe 1, and waterproof components. The manifold structure is located at the intersection of the road culvert 13 and the sewage pipe 1, between two sections of the road culvert 13. Both ends of the manifold structure are connected to the corresponding road culvert 13. The inner walls 12 of the manifold structure on both sides are provided with installation openings on the same axis. The sewage pipe 1 passes through the installation openings on both sides, allowing the sewage pipe 1 to cross the manifold structure. A waterproof component is provided between the inner wall of the installation opening and the outer wall of the sewage pipe 1 to seal the gap between the installation opening and the sewage pipe 1.
[0031] In some implementations, the manifold structure is a rectangular box structure with a top plate 10 and a bottom plate 9. An inspection well connecting to the ground 7 is located inside the manifold structure. Specifically, in this embodiment, the bottom of the sewage pipe 1 is at least 500mm from the top of the bottom plate 9 to avoid clogging of rainwater flow, and the top of the sewage pipe 1 is at least 200mm from the bottom of the top plate 10 to meet installation space requirements. In this embodiment, the bottom plate 9 is 350mm thick, the top plate 10 and the inner wall 12 of the manifold are 300mm thick, and the manifold height is 3200mm.
[0032] Furthermore, the inspection well includes a well shaft 3, a well base 11, a well cover 6, and a ladder 4. The top of the top plate 10 has a well shaft 3 that connects to the ground surface 7. The inner wall of the well shaft 3 is connected to the inner wall 12 of the well chamber on the same vertical plane. A well base 11 is located at the junction of the top of the well shaft 3 and the ground surface 7. A matching well cover 6 is installed on the well base 11. The inner wall of the well shaft 3 has a ladder 4 extending into the interior of the manhole structure. Specifically, in this embodiment, the inner diameter of the well shaft 3 is not less than 700mm, and the wall thickness is 240mm. In this embodiment, the well base 11 is made of ductile iron, and the well cover 6 is either cast in place or prefabricated in a factory. In this embodiment, the lower end of the ladder 4 is no more than 300mm from the top surface of the bottom plate 9, and the ladder 4 is composed of multiple ductile iron steps, which are installed at equal intervals on the inner wall 12 and the inner wall of the well shaft 3.
[0033] The inspection well connects directly to the ground level 7, allowing personnel to easily enter the well chamber for pipeline inspection, dredging, maintenance, and other operations.
[0034] Furthermore, the side walls of the manifold structure are widened, and the two sides of the manifold structure are set as rhomboid twisted surfaces, which are smoothly connected to the original cross-sectional box culverts 13 at both ends. Specifically, in this embodiment, the width of the twisted surfaces is widened by 500mm on each side, so that the flow velocity of water passing through the manifold structure is reduced due to the enlarged cross-sectional area, thereby reducing the impact of the water flow on the sewage pipe 1.
[0035] The widened design allows for a gradual transition from the cross-pass box culvert 13 to the junction well, reducing disturbances caused by sudden changes in water flow. The smooth connection helps reduce water flow resistance and improve drainage efficiency.
[0036] Furthermore, a concrete pad 14 is provided at the bottom of the base plate 9. The planar dimensions of the concrete pad 14 are not less than the planar dimensions of the base plate 9, and the concrete pad 14 has a certain thickness. Specifically, in this embodiment, the thickness of the concrete pad 14 is 100mm, and the length and width of the concrete pad 14 are 5000mm and 3500mm, respectively.
[0037] The concrete cushion layer 14 expands the foundation contact area, effectively distributing the load and preventing settlement. At the same time, the concrete cushion layer 14 also serves as a preliminary waterproof barrier, reducing the risk of groundwater seepage.
[0038] Furthermore, a sedimentation trough 8 is provided at the top of the bottom plate 9. The connection between the water-facing side of the sedimentation trough 8 and the bottom plate 9 of the well chamber is sloped to facilitate water flow. Specifically, in this embodiment, the sedimentation trough 8 has a depth of 500mm and a length of 2000mm.
[0039] The sedimentation trough 8 allows rainwater carrying silt, sand, gravel, and other debris in the culvert 13 to settle into the trough, thus reducing impact on the cross-shaped sewage pipe 1. The sloping design helps to mitigate the impact of water flow, making it easier for silt to settle. The centralized sedimentation method facilitates regular cleaning and extends the maintenance cycle.
[0040] In some implementation schemes, a protective beam 5 is provided inside the manifold structure on the water-facing side of the sewage pipe 1. The two ends of the protective beam 5 are respectively connected to the inner walls of both sides of the manifold structure. The protective beam 5 is at the same horizontal height as the sewage pipe 1, and the height of the protective beam 5 is not less than the diameter of the sewage pipe 1, so that the protective beam 5 can reduce the impact of water flow on the sewage pipe 1 inside the manifold. The water-facing surface of the protective beam 5 is set with an arc to reduce water flow resistance. Specifically, in this embodiment, the protective beam 5 is located at the center of the manifold, parallel to the sewage pipe 1 and on the water-facing side of the sewage pipe 1, 1500mm away from the transverse sewage pipe. The length, width, and height of the protective beam 5 are 3200mm, 200mm, and 400mm, respectively.
[0041] The arc-shaped design of the protective beam 5 can effectively reduce the flow velocity of rainwater and prevent high-speed water flow from directly impacting the sewage pipe 1. The protective beam 5 also acts as a "water barrier" to prevent the sewage pipe 1 from shifting or breaking due to long-term scouring.
[0042] In some implementation schemes, the sewage pipe 1 in this embodiment has a diameter of DN400 and is made of ductile iron. The ductile iron pipe passes entirely through the manhole of the manifold structure without leaving any joints, and both the inside and outside of the ductile iron pipe are treated with anti-corrosion measures.
[0043] In some implementation schemes, the waterproofing component is a rigid waterproof sleeve 2, which is located between the installation opening and the sewage pipe 1. Before installation, the waterproof sleeve 2 should be fully welded to the periphery of the flange and positioned before concrete pouring. During positioning, measures should be taken to ensure the design axis position and elevation of the sewage pipe 1 penetrating the wall.
[0044] The implementation principle of a stormwater and sewage collection well structure passing through a road culvert is as follows:
[0045] By setting up a manifold as a transition structure at the intersection of the road-crossing culvert 13 and the sewage pipe 1, the sewage pipe 1 can pass through the manifold chamber through the installation opening to form an independent channel, thus solving the elevation conflict problem that existed when the road-crossing culvert 13 and the sewage pipe 1 were arranged at an intersection. At the same time, it avoids the problems of high engineering cost and complicated operation and maintenance management caused by the sewage pipe 1 crossing through the bottom of the road-crossing culvert 13 using an inverted siphon. It not only achieves the separation of rainwater and sewage, ensuring the independent operation of each system and avoiding cross-contamination, but also provides access to the manifold structure with an inspection well, which facilitates pipe inspection and replacement, and achieves a seamless connection between sewage pipes 1 within the pipe network system.
[0046] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A stormwater and sewage mixing well structure for crossing a road culvert, characterized in that, include: The confluence well structure is located between two sections of road culvert (13), with both ends connected to the road culvert (13). The inner walls (12) of the well on both sides of the well itself are provided with installation openings on the same axis. The sewage pipe (1) is installed in the installation openings on both sides, so that the sewage pipe (1) can cross the manhole structure through the installation openings; A waterproof component is placed between the inner wall of the installation port and the outer wall of the sewage pipe (1) to seal the gap between the installation port and the sewage pipe (1).
2. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 1, characterized in that: The confluence well structure is a rectangular box structure with a top plate (10) at the top and a bottom plate (9) at the bottom. The confluence well structure has an inspection well that connects to the ground (7) inside.
3. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 2, characterized in that: The bottom of the base plate (9) is provided with a concrete cushion layer (14), and the planar dimensions of the concrete cushion layer (14) are not less than the planar dimensions of the base plate (9).
4. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 2, characterized in that: The bottom plate (9) is provided with a sedimentation tank (8), and the side wall of the sedimentation tank (8) facing the water is provided with a slope.
5. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 2, characterized in that: The inspection well includes a well cylinder (3), a well base (11), a well cover (6), and a ladder (4). The top plate (10) is provided with a well cylinder (3) that can connect to the ground (7). The inner wall of the well cylinder (3) is connected to the inner wall (12) of the well chamber on the same vertical plane. The well base (11) is provided at the junction of the top of the well cylinder (3) and the ground (7). A matching well cover (6) is installed on the well base (11). The inner wall of the well cylinder (3) is provided with a ladder (4) that extends into the interior of the confluence well structure.
6. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 1, characterized in that: The confluence well structure is provided with a protective beam (5) located on the water-facing side of the sewage pipe (1). The two ends of the protective beam (5) are respectively connected to the inner walls of the two sides of the confluence well structure. The protective beam (5) and the sewage pipe (1) are at the same horizontal height, and the height of the protective beam (5) is not less than the diameter of the sewage pipe (1). The water-facing surface of the protective beam (5) is set as an arc surface, so that the protective beam (5) can reduce the impact of water flow on the sewage pipe (1).
7. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 1, characterized in that: The two side walls of the junction well structure are widened and are connected to the two end cross-pass box culverts (13).
8. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 1, characterized in that: The sewage pipe (1) is made of ductile iron.
9. The stormwater and sewage mixing well structure for crossing a road culvert according to claim 1, characterized in that: The waterproof component adopts a rigid waterproof sleeve (2), which is located between the installation port and the sewage pipe (1).