L-shaped interchange water delivery and drainage culvert structure
The L-shaped interchange drainage culvert structure solves the problems of water flow turbulence and siltation in the existing U-shaped inverted siphon drainage culvert structure, achieving smoother drainage and less head loss, and simplifying construction and management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-07
AI Technical Summary
Existing inverted siphon drainage culverts with U-shaped structures suffer from problems such as turbulent and obstructed water flow, large head loss, and easy siltation. Furthermore, they are complex to construct and inconvenient to manage and operate.
The L-shaped interchange drainage culvert structure includes an underpass horizontal section culvert, an upstream vertical section culvert, and a horizontal extension section culvert. The connection is at an angle of 90 degrees ± 10%, and expansion joints and embedded water-stopping devices are used to improve flow and prevent siltation.
It achieves the effects of simple structure, convenient construction, smooth drainage, small head loss, easy management and operation, and is not prone to siltation.
Smart Images
Figure CN224092342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage culvert technology, and in particular to the structure of L-shaped interchange drainage culvert. Background Technology
[0002] Water conveyance culverts are commonly used structures in water conveyance projects, especially in mountainous and sloping water conveyance projects. When upstream water flows downstream and encounters transverse rivers, railways, highways, or other structures, the common practice in existing technology is to construct the water conveyance culvert as a U-shaped inverted siphon that passes under the transverse structure. The inlet and outlet sections of the U-shaped inverted siphon are vertically set, while the underpass section is horizontally set.
[0003] like Figure 1 The existing inverted siphon-type drainage culvert U-shaped structure, as shown, introduces water into the horizontal section below through the upstream vertical section and then discharges it through the downstream vertical section. In practical applications, this presents the following problems:
[0004] 1. The flow of water in the U-shaped structure of the inverted siphon drainage culvert has disadvantages such as turbulent flow, poor flow, and large head loss.
[0005] 2. It can easily cause siltation in the upstream and downstream vertical sections and the downstream horizontal section;
[0006] 3. Clearing blockages is difficult, and severe blockages can easily lead to project failure;
[0007] 4. Complex structure, difficult construction, and inconvenient management and operation.
[0008] Therefore, how to solve the problems of turbulent water flow, poor water flow, large head loss, and easy siltation in the existing U-shaped structure of inverted siphon drainage culvert has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0009] In view of the above-mentioned defects of the prior art, the present invention provides an L-shaped interchange drainage culvert structure, the purpose of which is to make the interchange drainage culvert structure simpler, easier to construct, smoother to drain, less head loss, less prone to siltation, and easier to manage and operate.
[0010] To achieve the above objectives, this utility model discloses an L-shaped interchange drainage culvert structure, including an underpass horizontal section culvert located below the road; the extension direction of the road forms an angle of 90 degrees ± 10% with the length direction of the underpass horizontal section culvert.
[0011] The culvert that passes under the horizontal section is connected at one end to the upstream channel and at the other end to the downstream channel.
[0012] The downstream horizontal culvert is connected to the upstream channel at one end, and a vertical upstream culvert is provided at the other end.
[0013] The upper end of the upstream vertical culvert is connected to the upstream channel at a bend of 90 degrees ± 10%, and the lower end is connected to the underpass horizontal culvert at a bend of 90 degrees ± 10%.
[0014] One end of the underpass horizontal culvert that connects to the downstream channel is provided with a horizontal extension culvert that extends along the length direction, and is connected to the downstream channel through the horizontal extension culvert.
[0015] Preferably, expansion joints and embedded water-stopping devices are provided between the upper end of the upstream vertical culvert and the upstream channel, between the underpass horizontal culvert and the horizontal extension culvert, and between the horizontal extension culvert and the downstream channel.
[0016] Preferably, each of the expansion joints is filled with an elastic material to form a seal.
[0017] More preferably, the expansion joint between the underpass horizontal culvert and the horizontal extension culvert is provided with a rigid seal.
[0018] More preferably, each of the embedded water-stopping devices is an embedded PE-16 type water-stopping strip.
[0019] More preferably, each of the expansion joints located on both sides of the corresponding embedded water-stopping device is sealed with polyethylene low-foaming sealant and polyurethane sealant.
[0020] Preferably, the lower end of the upstream vertical culvert section and the downstream horizontal culvert section form a smooth arc transition.
[0021] The beneficial effects of this utility model are:
[0022] The application of this utility model makes the structure of the overpass drainage culvert simpler, the construction more convenient, the drainage smoother, the head loss smaller, the less prone to siltation, and the management and operation more convenient.
[0023] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description
[0024] Figure 1 A schematic diagram of the U-shaped structure of the existing inverted siphon drainage culvert is shown.
[0025] Figure 2 The diagram shows a schematic of an overpass drainage culvert structure in one embodiment of the present invention.
[0026] In the diagram: 1. Upstream vertical culvert; 3. Underpass horizontal culvert; 4. Upstream channel; 6. Horizontal extension culvert; 7. Downstream channel. Detailed Implementation
[0027] Example
[0028] like Figure 2 As shown, the L-shaped interchange drainage culvert structure includes an underpass horizontal section culvert 3 located below the road; the extension direction of the road forms an angle of 90 degrees ± 10% with the length direction of the underpass horizontal section culvert 3.
[0029] Among them, one end of the underpass horizontal section culvert 3 is connected to the upstream channel 4, and the other end is connected to the downstream channel 7;
[0030] One end of the horizontal culvert 3 that connects to the upstream channel 4 is provided with a vertically installed upstream culvert 1.
[0031] The upper end of the upstream vertical culvert 1 is connected to the upstream channel 4 at a bend of 90 degrees ± 10%, and the lower end is connected to the underpass horizontal culvert 3 at a bend of 90 degrees ± 10%.
[0032] The end of the underpass horizontal culvert 3 that connects to the downstream channel 7 is provided with a horizontal extension culvert 6 that extends along the length direction, and is connected to the downstream channel 7 through the horizontal extension culvert 6.
[0033] This utility model allows water from the upstream channel 4 to be introduced into the downstream horizontal culvert 3 through the upstream vertical culvert 1, then discharged into the horizontal extension culvert 6 through the horizontal extension culvert 3, and finally discharged into the downstream channel 7 through the horizontal extension culvert 6. It has the advantages of simpler structure, more convenient construction, smoother drainage, less head loss, less siltation, and more convenient management and operation.
[0034] In some embodiments, expansion joints and embedded water-stopping devices are provided between the upper end of the upstream vertical culvert 1 and the upstream channel 4, between the underpass horizontal culvert 3 and the horizontal extension culvert 6, and between the horizontal extension culvert 6 and the downstream channel 7.
[0035] In some embodiments, each expansion joint is filled with an elastic material to form a seal.
[0036] In some embodiments, a rigid seal is provided on the exterior of the expansion joint between the underpass horizontal culvert 3 and the horizontal extension culvert 6.
[0037] In some embodiments, each embedded waterstop device is an embedded PE-16 type waterstop.
[0038] In some embodiments, each expansion joint is sealed with polyethylene low-foaming sealant and polyurethane sealant on both sides of the corresponding embedded sealing device.
[0039] In some embodiments, the lower end of the upstream vertical culvert 1 and the downstream horizontal culvert 3 form a smooth arc transition.
[0040] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. An L-shaped grade-separated interchange drainage culvert structure, comprising an underpass culvert (3) disposed beneath a road; wherein the extension direction of the road forms an angle of 90 degrees ± 10% with the length direction of the underpass culvert (3); characterized in that, One end of the underpass horizontal section culvert (3) is connected to the upstream channel (4), and the other end is connected to the downstream channel (7); The horizontal section culvert (3) is connected to the upstream channel (4) at one end, and a vertical section culvert (1) is provided at the other end. The upper end of the upstream vertical culvert (1) is connected to the upstream channel (4) at a bend of 90 degrees ± 10%, and the lower end is connected to the underpass horizontal culvert (3) at a bend of 90 degrees ± 10%. The underpass horizontal section culvert (3) is connected to the downstream channel (7) at one end, and is provided with a horizontal extension section culvert (6) extending along the length direction. The horizontal extension section culvert (6) is connected to the downstream channel (7).
2. The L-shaped interchange drainage culvert structure according to claim 1, characterized in that, Deformation joints and embedded water-stopping devices are provided between the upper end of the upstream vertical culvert (1) and the upstream channel (4), between the underpass horizontal culvert (3) and the horizontal extension culvert (6), and between the horizontal extension culvert (6) and the downstream channel (7).
3. The L-shaped interchange drainage culvert structure according to claim 2, characterized in that, Each of the aforementioned expansion joints is filled with elastic material to form a seal.
4. The L-shaped interchange drainage culvert structure according to claim 2, characterized in that, The expansion joint between the underpass horizontal section culvert (3) and the horizontal extension section culvert (6) is provided with a rigid seal.
5. The L-shaped interchange drainage culvert structure according to claim 2, characterized in that, Each of the embedded water-stopping devices is an embedded PE-16 type water-stopping strip.
6. The L-shaped interchange drainage culvert structure according to claim 2, characterized in that, Each expansion joint located on both sides of the corresponding embedded water-stopping device is sealed with polyethylene low-foaming sealant and polyurethane sealant.
7. The L-shaped interchange drainage culvert structure according to claim 1, characterized in that, The lower end of the upstream vertical culvert (1) and the downstream horizontal culvert (3) form a smooth arc transition.