Under culvert sewage gutter
By setting up a sewage interception ditch structure with brick sidewalls, river sidewalls, and prefabricated cover plates inside the culvert, the problem of serious sewage leakage was solved, and the leakage sewage was effectively collected and prevented from entering the river, thus improving the urban water environment and public safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA HUADONG ENG CORP LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-26
AI Technical Summary
Existing drainage culverts suffer from serious sewage leakage and are difficult to trace and treat, affecting the urban water environment and public safety.
Design a sewage interception ditch inside a culvert, including brick sidewalls, river channel sidewalls and precast cover plates, and set up waterproof and filling structures to form a sewage interception ditch to collect leaked sewage and prevent it from entering the river.
It achieves comprehensive collection of leaked sewage and effectively prevents it from entering rivers. It has a simple structure, is easy to construct and operate, and significantly improves the sewage interception effect, protecting the urban water environment and public safety.
Smart Images
Figure CN224412741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal water supply and drainage pipeline technology, and in particular to a sewage interception ditch inside a culvert. Background Technology
[0002] As a crucial component of stormwater drainage, culverts are an important part of urban infrastructure. However, they are often managed in a poor and inadequate manner, leading to damage to their internal structure and severe mixing of rainwater and sewage at the drainage outlets, which negatively impacts urban water environment improvement and public safety.
[0003] In the process of comprehensive water environment management, new technologies such as 3D laser scanning, pollutant source tracing, and source-clearing robots can be applied to the investigation, remediation, and management of drainage culverts. However, various high-density built-up areas face the problem of severe sewage leakage through the retaining walls of culverts, making source tracing and remediation difficult. Utility Model Content
[0004] The purpose of this utility model is to provide a sewage interception ditch inside a culvert to alleviate the problem of serious sewage leakage from the retaining wall inside the culvert and the difficulty in tracing and treating the source in the existing technology.
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:
[0006] A culvert intercepting sewer includes: brick sidewalls spaced at intervals along the leakage section of an existing retaining wall, a river channel sidewall opposite to the brick sidewalls, and a precast cover plate on top of the brick sidewalls and the river channel sidewalls. An outlet is formed between adjacent brick sidewalls, and the river channel sidewall is provided with a waterproof structure.
[0007] Furthermore, the waterproof structure includes a polyester-based waterproof membrane layer disposed on the side of the river channel wall near the brick masonry side wall.
[0008] Furthermore, a mortar layer is provided in the gap between the precast cover plate and the brick sidewall and the river channel sidewall.
[0009] Furthermore, the prefabricated cover plate comprises multiple pieces, and there is a cover plate sealing seam between adjacent prefabricated cover plates, with a filling structure provided in the cover plate sealing seam.
[0010] Furthermore, the filling structure includes a polyethylene foam board and a polysulfide sealant for sealing the joints.
[0011] Furthermore, multiple inspection covers are spaced apart above the prefabricated cover plate.
[0012] Furthermore, the river channel sidewall is reinforced with retaining wall reinforcement along its thickness direction.
[0013] Furthermore, the precast cover plate is provided with multiple cover plate reinforcing bars along its length.
[0014] Furthermore, the prefabricated cover plate is provided with access holes, and the access holes are provided with polysulfide sealant for filling and sealing the gaps.
[0015] Furthermore, it also includes a base plate located at the bottom of the brick masonry sidewall and the river channel sidewall, with reinforcing bars running through the base plate.
[0016] This utility model brings at least the following beneficial effects:
[0017] This utility model provides a sewage interception ditch inside a culvert, comprising: brick sidewalls spaced at intervals along the leakage section of an existing retaining wall, a river channel sidewall opposite to the brick sidewalls, and a precast cover plate disposed on the top of the brick sidewalls and the river channel sidewalls, with an outlet formed between adjacent brick sidewalls, and the river channel sidewalls being provided with a waterproof structure.
[0018] A sewage interception ditch is formed by precast cover slabs, brick masonry sidewalls, and riverbank sidewalls. The ditch is laid along the seepage section of the existing retaining wall. The brick masonry sidewalls are permeable, and the outlet design maximizes the collection of seepage wastewater from the existing retaining wall, achieving comprehensive sewage interception. A waterproof structure is installed on the riverbank side, which collects the seepage wastewater within the interception ditch, effectively preventing wastewater from entering the river. The overall structure of the interception ditch within the culvert is simple, has minimal social impact, is easy to construct, and exhibits significant sewage interception effectiveness.
[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies 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.
[0021] Figure 1 A schematic diagram of the sewage interception ditch inside the culvert provided in an embodiment of this utility model;
[0022] Figure 2 for Figure 1 Sectional view of AA;
[0023] Figure 3 for Figure 1 BB section view;
[0024] Figure 4 A schematic diagram of the reinforcing bars for the cover plate and the reinforcing bars for the retaining wall provided in an embodiment of this utility model;
[0025] Figure 5 A schematic diagram of the cover plate sealing seam and filling structure provided in an embodiment of this utility model.
[0026] icon:
[0027] 1-Inspection cover; 2-Precast cover plate; 3-Brick sidewall; 4-Mortar layer; 5-Polyester waterproof membrane roll layer; 6-Base slab reinforcement; 7-River channel sidewall; 8-Base slab; 9-Outlet; 10-Cover plate sealing joint; 11-Existing retaining wall; 12-River channel side; 13-Polysulfide sealant; 14-Polyethylene foam board; 15-Retaining wall reinforcement; 16-Cover plate reinforcement. Detailed Implementation
[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.
[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other. Figure 1 A schematic diagram of the sewage interception ditch inside the culvert provided in an embodiment of this utility model; Figure 2 for Figure 1 Sectional view of AA; Figure 3 for Figure 1 BB section view; Figure 4 A schematic diagram of the reinforcing bars for the cover plate and the reinforcing bars for the retaining wall provided in an embodiment of this utility model; Figure 5 A schematic diagram of the cover plate sealing seam and filling structure provided in an embodiment of this utility model.
[0034] Example 1
[0035] Due to land constraints during urban development, an increasing number of upstream capillary tributaries of rivers are being covered and converted into culverts. As a crucial component of stormwater drainage, culverts are vital urban infrastructure. Various high-density built-up areas suffer from severe sewage leakage within the retaining walls of these culverts, with difficulties in tracing and remediating the source, impacting urban water environment improvement and public safety.
[0036] In view of this, the present utility model provides a sewage interception ditch in a culvert, including: brick sidewalls 3 arranged at intervals along the leakage section of the existing retaining wall 11, river sidewalls 7 arranged opposite to the brick sidewalls 3, and prefabricated cover plates 2 arranged on the top of the brick sidewalls 3 and the river sidewalls 7, with water outlets 9 formed between adjacent brick sidewalls 3, and the river sidewalls 7 provided with a waterproof structure.
[0037] A precast cover slab 2, brick-built sidewalls 3, and riverbank sidewalls 7 form an intercepting ditch. The ditch is laid along the seepage section of the existing retaining wall 11. The brick-built sidewalls 3 are permeable, and the outlet 9 allows for the maximum collection of seepage wastewater from the existing retaining wall 11, achieving comprehensive interception. A waterproof structure is installed on the riverbank side 12, which collects the seepage wastewater within the intercepting ditch, effectively preventing wastewater from entering the river. The intercepting ditch within the culvert has a simple overall structure, minimal social impact, is easy to construct, and provides significant interception effectiveness, effectively protecting the urban water environment and public safety.
[0038] In this embodiment, the prefabricated cover plate 2 has a thickness of 80mm and a width of 680mm. The river channel sidewall 7 has a thickness of 240mm. The brick-built sidewall 3 has a thickness of 115mm, a height of 500mm, and a spacing of 1000mm. The spacing of the outlets 9 is 240mm, which can also be adjusted according to the location of sewage leakage. The net width of the intercepting ditch is 300mm, and the net height is 500mm.
[0039] In an optional embodiment, the waterproof structure includes a polyester-based waterproof membrane 5 disposed on the side of the river channel sidewall 7 near the brick masonry sidewall 3.
[0040] Please see Figure 3 A polyester roll waterproof layer 5 with a thickness of 4mm is installed on the river side 12 to prevent sewage from entering the river.
[0041] In an optional embodiment, a mortar layer 4 is provided in the gap between the precast cover plate 2 and the brick side wall 3 and the river channel side wall 7.
[0042] Please see Figure 3 The mortar layer 4 can be made of dry-mixed pre-mixed mortar, which can fill the gaps between the precast cover plate 2 and the brick side wall 3 and the river channel side wall 7. In addition, a 20mm thick layer of dry-mixed pre-mixed mortar needs to be applied to the polyester-based waterproof membrane layer 5, a 20mm thick layer of dry-mixed pre-mixed mortar needs to be applied between the river channel side wall 7 and the polyester-based waterproof membrane layer 5, and a 20mm thick layer of dry-mixed pre-mixed mortar needs to be applied to the outer wall of the river channel side wall 7.
[0043] In an optional embodiment, the prefabricated cover plate 2 includes multiple pieces, and there is a cover plate sealing seam 10 between adjacent prefabricated cover plates 2, with a filling structure provided in the cover plate sealing seam 10.
[0044] Please see Figure 1 The intercepting ditch is divided into sections every 10-15 meters. The cover plate sealing section 10 is 2cm wide and has a filling structure inside, which can effectively fill the gaps between the prefabricated cover plates 2, ensuring that the collected leakage sewage is collected inside the intercepting ditch.
[0045] For details, please see Figure 5 The filling structure includes a polyethylene foam board 14 and a polysulfide sealant 13 for sealing the joint.
[0046] In this embodiment, to facilitate construction within the culvert, a prefabricated cover plate 2 with a permeability grade of P6 is used. The cover plate sealing joint 10 is filled with a 60mm thick polyethylene foam board 14, and the joint is sealed with a two-component polysulfide sealant 13.
[0047] In an optional embodiment, multiple inspection covers 1 are spaced apart above the prefabricated cover plate 2.
[0048] In this embodiment, an inspection cover 1 can be installed every 40m in the intercepting ditch to facilitate maintenance.
[0049] In an optional embodiment, the river channel sidewall 7 is provided with retaining wall reinforcement 15 along the thickness direction.
[0050] Furthermore, the precast cover plate 2 is provided with multiple cover plate reinforcing bars 16 along its length.
[0051] Please see Figure 4 In this embodiment, both the river channel sidewall 7 and the prefabricated cover plate 2 are reinforced with anchor bars, which can improve the structural strength and ensure the stability of the structure.
[0052] In an optional embodiment, the prefabricated cover plate 2 is provided with an access hole, and the access hole is provided with polysulfide sealant 13 for filling and sealing the joint.
[0053] In this embodiment, if a drainage pipe is to be connected along the line, and the pipe needs to be connected through the prefabricated cover plate 2, an access hole should be reserved in advance according to the pipe connection requirements, and the two-component polysulfide sealant 13 should be used to seal and fill the gap.
[0054] In this embodiment, if a drainage pipe is connected along the line and the pipe passes through the side wall of the intercepting ditch, the joint should be sealed with two-component polysulfide sealant 13 to fill the gap.
[0055] In an optional embodiment, a base plate 8 is provided at the bottom of the brick side wall 3 and the river channel side wall 7, and the base plate 8 is permeated with a base plate reinforcement 6.
[0056] Please see Figure 2 In this embodiment, the base slab 8 is also provided with a polyester-based waterproof membrane 5, with a thickness of 4mm, to prevent sewage from entering the river. Before constructing the base slab 8 with the polyester-based waterproof membrane 5, the base slab should be roughened, and the bearing capacity of the foundation should not be less than 80kPa before construction. The base slab 8 is also reinforced with reinforcing bars 6. The reinforcing bars 6, the cover plate reinforcing bars 16, and the retaining wall reinforcing bars 15 are all HRB400 grade, and the depth is 150mm.
[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A sewage interception ditch inside a culvert, characterized in that, include: The existing retaining wall has a series of brick sidewalls, a river channel sidewall, and a precast cover plate on top of the brick sidewalls and the river channel sidewall. An outlet is formed between adjacent brick sidewalls, and the river channel sidewall is equipped with a waterproof structure.
2. The sewage interception ditch inside the culvert according to claim 1, characterized in that, The waterproof structure includes a polyester-based waterproof membrane layer disposed on the side wall of the river channel near the brick masonry side wall.
3. The intercepting sewer in the culvert according to claim 1, characterized in that, A mortar layer is provided between the precast cover plate and the brick sidewall and the river channel sidewall.
4. The sewage interception ditch inside the culvert according to claim 1, characterized in that, The prefabricated cover plate comprises multiple pieces, and there is a cover plate sealing seam between adjacent prefabricated cover plates, and a filling structure is provided in the cover plate sealing seam.
5. The intercepting sewer in the culvert according to claim 4, characterized in that, The filling structure includes a polyethylene foam board and a polysulfide sealant for sealing the joints.
6. The intercepting sewer in the culvert according to claim 1, characterized in that, Multiple inspection covers are spaced apart above the prefabricated cover plate.
7. The intercepting sewer in the culvert according to claim 1, characterized in that, The river channel sidewall is reinforced with retaining wall reinforcement along its thickness direction.
8. The intercepting sewer in the culvert according to claim 1, characterized in that, The precast cover plate has multiple cover plate reinforcing bars along its length.
9. The intercepting sewer in the culvert according to claim 1, characterized in that, The prefabricated cover plate is provided with access holes, and the access holes are provided with polysulfide sealant for filling and sealing the gaps.
10. The sewage interception ditch inside the culvert according to claim 1, characterized in that, It also includes a base plate located at the bottom of the brick sidewall and the river channel sidewall, wherein the base plate is reinforced with reinforcing bars.