Anti-scouring protective structure of underwater pipeline
A protective structure with wire mesh cages and sloping plates mitigates pipe erosion in steep riverbeds by managing water velocity, ensuring pipeline stability and integrity.
Patent Information
- Application Number
- CN202422398724.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In natural gas projects, when the sub-high pressure gas pipeline crosses the river, the longitudinal slope of the riverbed is too steep, causing the water flow rate to be greater than the anti-rush safety flow rate, causing the pipeline to be washed by the river water, and then there are problems such as seepage, damage, and leakage.
Design an anti-shrink protection structure for bottom pipes, including upstream lead wire cages, anti-shrink bottom plates and downstream lead wire cages, forming a water drop structure, and semi-surrounding the pipeline through the combination of inclined plate sections, insert plate sections and fillers to enhance stability and protective effect.
Effectively prevent the pipe from eroding by water flow, ensure that the pipe is not easily eroded by water flow in riverbeds with steep longitudinal slopes, and improve the service life and safety of the pipe.
Smart Images
Figure CN223105649U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of underwater pipeline protection, in particular to an anti-scouring protection structure for underwater pipelines. Background Technique
[0002] In the construction of natural gas projects, there are many technical difficulties for the secondary high-pressure gas pipeline to cross a river. One of the technical difficulties is that sometimes the longitudinal slope of the riverbed is too steep, causing the water flow velocity to be greater than the anti-scouring safety velocity, which easily causes the buried pipeline to be scoured by the river water, resulting in situations such as pipeline water seepage, damage, and leakage, affecting the normal use of the pipeline. Summary of the Invention
[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the utility model provides an anti-scouring protection structure for underwater pipelines, which is applied in a steeper riverbed and can prevent the pipeline buried underwater from being scoured by water flow.
[0004] Technical Solution: To achieve the above object, an anti-scouring protection structure for underwater pipelines of the utility model includes an upstream gabion, an anti-scouring bottom plate, and a downstream gabion connected in sequence along the water flow direction. The pipeline is correspondingly buried below the anti-scouring bottom plate; the upstream gabion is flush with the top of the anti-scouring bottom plate; the downstream end of the anti-scouring bottom plate has an inclined plate section, and the inclined plate section slopes downward along the water flow direction. The anti-scouring bottom plate is connected to the downstream gabion through the inclined plate section, so as to form a hydraulic jump structure between the anti-scouring bottom plate and the downstream gabion.
[0005] Further, the upstream end of the anti-scouring bottom plate has an inserted plate section, and the inserted plate section is inserted downward into the bottom of the water; between the inserted plate section and the inclined plate section is a top plate section, and the top plate section is correspondingly flush with the upstream gabion; with the cooperation of the inserted plate section, the top plate section, and the inclined plate section, the anti-scouring bottom plate semi-surrounds the pipeline.
[0006] Further, the inclined plate section extends downward to the lower part of the downstream gabion, and there is a filler between the downstream gabion and the inclined plate section.
[0007] Further, the inclined lower end of the inclined plate section has a flat plate section, and the flat plate section extends horizontally along the water flow direction, and the filler is correspondingly pressed on the flat plate section.
[0008] Further, a trench is dug at the bottom of the water, and the inserted plate section is correspondingly inserted into the trench; there is a filler in the trench, and the upstream gabion is pressed on the filler in the trench, and the filler squeezes the inserted plate section against the inner wall of the trench.
[0009] Further, a hook body is arranged at the lower end of the inserted plate section, and the front end of the hook body is correspondingly inserted into the inner wall of the trench.
[0010] Further, the filler is gravel.
[0011] Beneficial effects: A scouring prevention and protection structure for an underwater pipeline of the present utility model is successively provided with an upstream gabion, a scouring prevention bottom plate, and a downstream gabion along the water flow direction. A drop structure is formed between the scouring prevention bottom plate and the downstream gabion, and the scouring prevention bottom plate semi-surrounds the pipeline, which can effectively prevent the pipeline buried underwater from being scoured by water flow. Description of the Drawings
[0012] Appendix Figure 1 It is a schematic diagram of the pipeline scouring prevention structure of the present utility model. Detailed Embodiment
[0013] The following further describes the present utility model with reference to the drawings.
[0014] As shown in the appendix Figure 1 A scouring prevention and protection structure for an underwater pipeline includes an upstream gabion 1, a scouring prevention bottom plate 2, and a downstream gabion 3 that are successively connected along the water flow direction. Both the upstream gabion 1 and the downstream gabion 3 are filled with stones. The pipeline 4 is correspondingly buried below the scouring prevention bottom plate 2, and the scouring prevention bottom plate 2 protects the pipeline 4 from being scoured by water flow. The upstream gabion 1 and the downstream gabion 3 can keep the scouring prevention bottom plate 2 stable on the riverbed.
[0015] The tops of the upstream gabion 1, the scouring prevention bottom plate 2, and the downstream gabion 3 are all flat surfaces, and the top of the upstream gabion 1 is flush with the top of the scouring prevention bottom plate 2. A sloping plate section 5 is provided at the downstream end of the scouring prevention bottom plate 2, and the sloping plate section 5 slopes downward along the water flow direction. The scouring prevention bottom plate 2 is connected to the downstream gabion 3 through the sloping plate section 5. Thus, the top of the downstream gabion 3 is lower than the top of the scouring prevention bottom plate 2, and a drop structure 6 is formed between the scouring prevention bottom plate 2 and the downstream gabion 3.
[0016] When the pipeline 4 is buried in a riverbed with a relatively steep longitudinal slope, it is easy to cause the water flow velocity to be greater than the scouring prevention safety velocity. In the scouring prevention and protection structure of the present utility model, the top of the upstream gabion 1 is flush with the top of the scouring prevention bottom plate 2, and a drop structure 6 is artificially created between the scouring prevention bottom plate 2 and the downstream gabion 3, so that the position of the water flow drop is moved to the downstream of the pipeline 4. Therefore, it can not only make the scouring prevention and protection structure adapt to a riverbed with a relatively steep longitudinal slope, but also make the water flow velocity above the pipeline 4 lower, making the pipeline 4 less likely to be scoured by water flow.
[0017] An insertion plate section 7 is provided at the upstream end of the scouring prevention bottom plate 2, and the insertion plate section 7 inserts downward into the water bottom. Between the insertion plate section 7 and the sloping plate section 5 is a top plate section 8, and the top plate section 8 extends horizontally and is correspondingly flush with the upstream gabion 1. The lower ends of the insertion plate section 7 and the sloping plate section 5 are both lower than the burial position of the pipeline 4. Therefore, with the cooperation of the insertion plate section 7, the top plate section 8, and the sloping plate section 5, the scouring prevention bottom plate 2 semi-surrounds the pipeline 4, providing a better protection effect for the pipeline 4.
[0018] The inclined plate section 5 extends downward to the lower part of the downstream gabion 3, and there is a filler 9 between the downstream gabion 3 and the inclined plate section 5. Specifically, the filler 9 is sand and gravel. The downstream gabion 3 and the sand and gravel press on the inclined plate section 5, thereby making the erosion prevention bottom plate 2 more stable.
[0019] There is a flat plate section 10 at the inclined lower end of the inclined plate section 5. The flat plate section 10 extends horizontally along the water flow direction, and the filler 9 correspondingly presses on the flat plate section 10. Due to the existence of the flat plate section 10, the downstream gabion 3 and the sand and gravel have a better effect of pressing and fixing the erosion prevention bottom plate 2.
[0020] A trench 11 is formed at the bottom of the water. The insertion plate section 7 is correspondingly inserted into the trench 11. There is a filler 9 in the trench 11. Specifically, the filler 9 is also sand and gravel. The upstream gabion 1 presses on the filler 9 in the trench 11, and the filler 9 squeezes the insertion plate section 7 against the inner wall of the trench 11, thereby keeping the insertion plate section 7 stable in the trench 11 and having a better fixing effect on the erosion prevention bottom plate 2.
[0021] A hook body is arranged at the lower end of the insertion plate section 7, and the front end of the hook body correspondingly inserts into the inner wall of the trench 11. In an embodiment, a through hole is formed at the lower end of the insertion plate section 7, and the front end of the hook body passes through the through hole and then inserts into the inner wall of the trench 11, so that the lower end of the insertion plate section 7 is hooked on the inner wall of the trench 11, the insertion plate section 7 is more stable in the trench 11, and correspondingly, the erosion prevention bottom plate 2 can be more stably fixed on the river bed, and the protection effect on the pipeline 4 is better.
[0022] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.
Claims
1. An anti-erosion protection structure for an underwater pipeline, characterized in that: It includes an upstream gabion (1), an anti-scouring bottom plate (2), and a downstream gabion (3) connected in sequence along the water flow direction. The pipeline (4) is correspondingly buried under the anti-scouring bottom plate (2); the upstream gabion (1) is flush with the top of the anti-scouring bottom plate (2); the downstream end of the anti-scouring bottom plate (2) has an inclined plate section (5), and the inclined plate section (5) slopes downward along the water flow direction. The anti-scouring bottom plate (2) is connected to the downstream gabion (3) through the inclined plate section (5), so that a drop structure (6) is formed between the anti-scouring bottom plate (2) and the downstream gabion (3).
2. The anti-scouring protection structure of a subaqueous pipeline according to claim 1, characterized in that: The upstream end of the anti-scouring bottom plate (2) has an inserted plate section (7), and the inserted plate section (7) is inserted downward into the water bottom; between the inserted plate section (7) and the inclined plate section (5) is a top plate section (8), and the top plate section (8) is correspondingly flush with the upstream gabion (1); with the cooperation of the inserted plate section (7), the top plate section (8), and the inclined plate section (5), the anti-scouring bottom plate (2) semi-surrounds the pipeline (4).
3. The anti-erosion protection structure for an underwater pipeline according to claim 2, wherein: The inclined plate section (5) extends downward to the lower part of the downstream gabion (3), and there is a filler (9) between the downstream gabion (3) and the inclined plate section (5).
4. A scouring prevention and protection structure for an underwater pipeline according to claim 3, characterized in that: The lower inclined end of the inclined plate section (5) has a flat plate section (10), and the flat plate section (10) extends horizontally along the water flow direction, and the filler (9) is correspondingly pressed on the flat plate section (10).
5. The anti-erosion protection structure of a subaqueous pipeline according to claim 2, characterized in that: A ditch pit (11) is opened in the water bottom, and the inserted plate section (7) is correspondingly inserted into the ditch pit (11); there is a filler (9) in the ditch pit (11), the upstream gabion (1) is pressed on the filler (9) in the ditch pit (11), and the filler (9) squeezes the inserted plate section (7) against the inner wall of the ditch pit (11).
6. The anti-erosion protection structure of a subaqueous pipeline according to claim 5, characterized in that: The lower end of the inserted plate section (7) is provided with a hook body, and the front end of the hook body is correspondingly inserted into the inner wall of the ditch pit (11).
7. The anti-scouring protection structure for an underwater pipeline according to claim 3 or 5, characterized in that: The filler (9) is cobblestone.