Water conservancy irrigation area project inverted siphon crossing riverway anti-scour protection structure
By designing multiple anti -flushing and protection structures through the rising siphon, it solves the problem of damage, blockage, foundation settlement, and river channel diversion caused by flood scouring, and realize the permanent safety and stable operation of the inverted siphon.
Patent Information
- Application Number
- CN202420532290.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-19
AI Technical Summary
In areas with complex terrain and geological conditions and frequent flooding during flood seasons, inverted siphons are prone to damage, blockage, foundation settlement and river channel diversion when crossing the river, which affects the stability and reliability of the drainage system.
The anti -brush protection structure of the water conservancy irrigation zone project through the water conservancy irrigation area is designed, including excavating materials on the river bed and setting up gravel exchanges in the bottom, pipeline outsourcing concrete, and setting up large -scale pebble backfills and reclaiming area in the upstream Foot protective and anti -rinse concrete structure, set up an anti -force pool and buried stone concrete protection in the lower reaches, to prevent floods from being washed by multiple protection measures.
Through multiple anti -scour protection measures, ensure the permanent safety of the flooding absorbing tube, prevent floods from scouring of pipelines and foundations, and achieve the stability and reliable operation of the flooding absorbing tube through the river.
Smart Images
Figure CN222412833U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas static pressure lubrication of water conservancy projects, and in particular relates to an anti-scouring protection structure for an inverted siphon pipe of a water conservancy irrigation project crossing a river. Background Art
[0002] Inverted siphon (also called inverted siphon drain) is an engineering facility used in drainage system. Its design principle is to use the shape and gravity of the pipe to achieve drainage. Its wide application in water conservancy irrigation projects in my country helps to improve irrigation efficiency, protect farmland and plant growth environment, and also provides technical support for the rational use and management of water resources.
[0003] Due to the terrain and geological conditions, the inverted siphon needs to be buried to cross the river channel with deep cover. However, the long-term scouring of floods during the flood season may cause some problems to the inverted siphon, such as:
[0004] Pipe damage: Flooding may cause damage to pipes, such as ruptures or breaks in pipes, which can affect the normal operation of the drainage system or even cause the drainage system to fail completely.
[0005] Pipeline blockage: Floods may bring a large amount of silt and debris, which may block the inverted siphon, affect its drainage effect, and even cause the water level to rise, further increasing the threat of floods.
[0006] Foundation settlement: Long-term flooding may cause the soil around the pipe to loosen and settle, which may cause the position of the inverted siphon to change and affect the stability and performance of the drainage system.
[0007] River diversion: Long-term flood erosion may cause changes in the shape and direction of the river channel, which may cause the inverted siphon to lose its drainage function, requiring readjustment or replacement of drainage facilities.
[0008] In summary, for areas with complex topographic and geological conditions and frequent floods during the flood season, these factors need to be considered in the design and operation and maintenance, and corresponding measures need to be taken to deal with possible problems to ensure the stable and reliable operation of the drainage system. How to ensure the permanent safety of the inverted siphon building in the case of flood scouring during the flood season of the river is a design worth studying. Utility Model Content
[0009] In order to solve the defects of the above-mentioned prior art, the utility model proposes an anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project.
[0010] The technical solution adopted by the utility model is as follows:
[0011] A water conservancy irrigation project inverted siphon pipe crossing river channel anti-scour protection structure, including: an excavated material backfill area sunken downward on the riverbed, the bottom of the excavated material backfill area is a crushed stone replacement area, a pipeline is installed above the crushed stone replacement area, the outside of the pipeline is coated with external concrete, the excavated material is backfilled in the excavated material backfill area, and a concrete protective surface is poured on the top of the excavated material.
[0012] In a preferred technical solution, the horizontal cross-section of the excavated material backfill area is trapezoidal, with inclined slopes on both sides.
[0013] In a preferred technical solution, a large-diameter pebble backfill area is provided upstream of the excavated material backfill area, and the large-diameter pebble backfill area has a trapezoidal horizontal cross-section, and its depth is greater than that of the excavated material backfill area.
[0014] In the preferred technical solution, a foot-protecting and anti-collision concrete structure is cast in the large-diameter pebble backfill area, and one side of the foot-protecting and anti-collision concrete structure is connected to the concrete face.
[0015] Furthermore, a plurality of rubber water-stopping structures are installed at the connection between the foot guard and the anti-impact concrete structure and the concrete face guard.
[0016] In the preferred technical solution, an energy dissipation pool is provided in the downstream direction of the excavated material backfill area. The energy dissipation pool includes an inclined section and a water surface section. The inclined section is connected to the right side of the excavated material backfill area.
[0017] Furthermore, a slope bottom layer concrete structure and a slope surface layer concrete structure are sequentially cast on the inclined section of the energy dissipation pool.
[0018] Furthermore, a covering layer and a horizontal surface concrete structure are sequentially arranged on the water surface section of the energy dissipation pool, and a plurality of drainage pipes are vertically inserted in the horizontal surface concrete structure. The bottom ends of the drainage pipes are in contact with the covering layer, and the upper ends pass through the horizontal surface concrete structure to be connected with the air.
[0019] Furthermore, the covering layer is composed of a base geotextile, a coarse sand cushion layer (15) and a crushed stone layer 16 from bottom to top.
[0020] In the preferred technical solution, a stone-buried concrete apron is provided downstream of the energy dissipation pool.
[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0022] The utility model provides a first layer of protection for the buried pipe section of the inverted siphon pipe body passing through the riverbed by externally wrapped concrete, and then ensures that the upstream surface foundation of the pipe is not washed away by floods through the upstream excavated material backfill area and the footing concrete, ensures that the surface of the excavated backfill material section of the pipe is not washed away by floods through the concrete protective surface on the top of the pipe, and dissipates energy of the flood through the downstream energy dissipation pool, thereby ensuring that the downstream surface foundation of the pipe is not washed away by floods, and finally achieves the purpose of protecting the permanent safety of the inverted siphon pipe body, thereby basically realizing the anti-scouring protection design of the inverted siphon pipe crossing the river channel, which is an innovative protection design, and achieves the safety of long-term operation of the inverted siphon pipe through multiple anti-scouring protections. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0024] Figure 1 It is a cross-sectional view of the utility model.
[0025] Reference numerals:
[0026] Pipeline 1, external concrete 2, crushed stone replacement area 3, excavated material backfill area 4, concrete surface protection 5, foot protection and anti-impact concrete structure 6, large-size pebble backfill area 7, slope surface concrete structure 8, slope bottom layer concrete structure 9, upper layer concrete 10, lower layer concrete 11, reinforced connecting anchor bars 12, drainage pipe 13, foundation geotextile 14, coarse sand cushion layer 15, crushed stone layer 16, buried stone concrete tank protection 17. DETAILED DESCRIPTION
[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0028] This embodiment provides a water conservancy irrigation project inverted siphon pipe crossing the river anti-scouring protection structure, see Figure 1 ,include:
[0029] A water conservancy irrigation project inverted siphon pipe crossing river channel anti-scour protection structure, comprising: an excavated material backfill area 4 (horizontal length L2 is 20.625m) sunken downward on the riverbed, the bottom of the excavated material backfill area 4 is a crushed stone replacement area 3 (thickness 1m), a pipeline 1 is installed above the crushed stone replacement area 3, the pipeline 1 is 3 DN2000mm ductile iron pipes, the outside of the pipeline 1 is coated with outer concrete 2 (thickness 0.5m), the excavated material is backfilled in the excavated material backfill area 4, and a concrete protective surface 5 (thickness 0.5m) is poured on the top of the excavated material.
[0030] In this embodiment, three ductile iron pipes are arranged side by side, with a pipe diameter of DN2000mm, K9 grade, socket-type joints, and a center distance L6 of 4.5m.
[0031] In this embodiment, the horizontal cross-section of the excavated material backfill area 4 is trapezoidal, with inclined slopes on both sides, the slope ratio of the left slope is 1:1.25, and the slope ratio of the right slope is 1:1.25.
[0032] The beneficial effects achieved by the above embodiments are:
[0033] 1) Ductile iron pipes (3 DN2000mm) are covered with concrete 2 (thickness 0.5m) through pipe 1 to prevent water flow from directly eroding the pipe body.
[0034] 2) Considering that the foundation is a thick covering layer, it is necessary to improve the foundation bearing capacity. Therefore, the ductile iron pipe (3 DN2000mm) is passed through the bottom of the pipeline 1 to set the foundation gravel replacement area 3 (thickness 1m) to prevent uneven settlement of the foundation of the pipeline 1 and damage the socket joint of the pipeline 1.
[0035] 3) The surface of the backfill area of the ductile iron pipes (3 pieces DN2000mm) is protected by a concrete face 5 (thickness 0.5m) to prevent the river flood from scouring the backfill area, thereby protecting the pipeline 1 from being scoured.
[0036] In another preferred embodiment, a large-size pebble backfill area 7 (horizontal length L1 is 5m) is provided in the upstream direction of the excavated material backfill area 4. The horizontal cross-section of the large-size pebble backfill area 7 is trapezoidal. The slope ratio of the left slope is 1:0.6, and the slope ratio of the right slope is 1:0.6. Its depth is greater than the excavated material backfill area 4, and the burial depth H1 is 6.0m.
[0037] In this embodiment, a foot-protecting and anti-collision concrete structure 6 is cast in the large-diameter pebble backfill area 7 , and one side of the foot-protecting and anti-collision concrete structure 6 is connected to the concrete protective surface 5 by a slope.
[0038] In this embodiment, a plurality of rubber water-stopping structures are installed at the connection between the foot protection and anti-collision concrete structure 6 and the concrete protective surface 5 .
[0039] The beneficial effects achieved by the above embodiments are:
[0040] The ductile iron pipe can prevent river floods from scouring the upstream foundation of the pipeline 1 through the large-size pebble backfill area 7 and the foot-protecting anti-scouring concrete structure 6 (thickness 1.2m, depth 6.0m) set upstream, thereby ensuring the safety of the pipeline 1.
[0041] In another preferred embodiment, an energy dissipation pool is provided in the downstream direction of the excavated material backfill area 4. The cross-section of the excavated material backfill area 4 is a trapezoid, which includes inclined ends on the left and right sides and a horizontal section in the middle. The slope ratio of the left inclined section is 1:a (a is 3.0), the height H2 is 3.4m, and the horizontal length L3 is 10.2m; the slope ratio of the right inclined section is 1:b (b is 1.2), and the height H3 is 2.0m; the length of the horizontal section in the middle and the right inclined section together is L4, which is 20.4m.
[0042] In this embodiment, the left inclined section is connected to the right side of the excavated material backfill area 4 in an inclined surface.
[0043] In this embodiment, a slope bottom layer concrete structure 9 and a slope surface layer concrete structure 8 are sequentially cast on the inclined section of the energy dissipation pool.
[0044] In this embodiment, a covering layer and a horizontal surface concrete structure are sequentially arranged on the water surface section of the energy dissipation pool, and a plurality of drainage pipes 13 are vertically inserted in the horizontal surface concrete structure. The bottom end of the drainage pipe 13 is in contact with the covering layer, and the upper end passes through the horizontal surface concrete structure to be connected with the air.
[0045] Furthermore, the horizontal surface concrete structure includes two layers of concrete, the upper layer of concrete 10 is 0.3m thick, and the lower layer of concrete is 0.7m thick. The upper and lower layers of concrete are reinforced with anchor bars 12, using Φ20 anchor bars, with a spacing of 1.2m, a length of 1.0m, and a 0.2m bend at the end, and the concrete surface steel mesh is welded firmly. ф100mm PVC drainage pipes 13 are arranged in a plum blossom shape with a spacing of 2m and a length of 1.0m.
[0046] Furthermore, the covering layer is composed of a base geotextile 14 (300 g / m 2 ), coarse sand cushion layer 15 (thickness 0.1m) and crushed stone layer 16 (thickness 0.35m), the basic geotextile 14 is a molding material that is publicly available and can be directly purchased in the prior art, the coarse sand cushion layer 15 is formed by filling coarse sand and stone, and the crushed stone layer 16 is formed by filling small crushed stone particles. The above structure can ensure that the fine sand and gravel at the bottom of the riverbed are blocked without affecting the flow of water, and can prevent the riverbed at the bottom of the energy dissipation pool from being washed away by the water flow, resulting in settlement.
[0047] The beneficial effects achieved by the above embodiments are:
[0048] The ductile iron pipe dissipates the flood energy through the downstream stilling pool section, thereby preventing the river flood from scouring the foundation on the downstream side of the pipeline 1. A ф100mm PVC drainage pipe 13 is set to reduce the pulsating pressure of the stilling pool bottom plate, and a foundation geotextile 14, a coarse sand cushion layer 15 and a filter material are set at the same time to ensure the safety of the stilling pool foundation.
[0049] In another preferred embodiment, a stone-buried concrete apron 17 is provided downstream of the energy dissipation pool, and its thickness is 0.8m. A tooth groove is provided at the end of the stone-buried concrete apron 17, and the depth H5 is 2.8m. The upstream and downstream excavation slope ratio is 1:0.5, and the horizontal length L5 of section E of the stone-buried concrete apron 17 is 12.8m.
[0050] The beneficial effects achieved by the above embodiments are:
[0051] The river flood dissipates energy through the downstream energy dissipation pool and then flows to the downstream river channel, which may cause the riverbed surface to be lowered after scouring the surface of the downstream natural river channel. Therefore, the energy dissipation pool and the apron are protected by setting a 6.0m groove to their lower foundation.
[0052] The water flow pattern in the utility model is described as follows:
[0053] The flood water in the river flows through the upstream footing anti-scour concrete section A, then passes through the ductile iron pipe body section B, enters the slope connection section C, and then enters the energy dissipation pool section D, and then passes through the buried stone concrete tank section 17 E at the outlet of the energy dissipation pool, and finally flows to the downstream river.
[0054] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A water conservancy irrigation project inverted siphon pipe crossing the river anti-scouring protection structure, characterized in that: include: The excavated material backfill area is sunken on the riverbed. The bottom of the excavated material backfill area is a gravel replacement area. A pipe is installed above the gravel replacement area. The outside of the pipe is covered with external concrete. The excavated material is backfilled in the excavated material backfill area, and a concrete protective surface is poured on the top of the excavated material.
2. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 1, characterized in that: The horizontal cross-section of the excavated material backfill area is trapezoidal, with inclined slopes on both sides.
3. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 1, characterized in that: A large-diameter pebble backfill area is arranged upstream of the excavated material backfill area. The large-diameter pebble backfill area has a trapezoidal horizontal cross-section, and its depth is greater than that of the excavated material backfill area.
4. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 1, characterized in that: A footing and anti-scouring concrete structure is poured in the large-diameter pebble backfill area, and one side of the footing and anti-scouring concrete structure is connected to the concrete face.
5. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 4, characterized in that: Several rubber water-stop structures are installed at the connection between the foot-protecting anti-collision concrete structure and the concrete face.
6. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 4, characterized in that: An energy dissipation pool is arranged in the downstream direction of the excavated material backfill area. The energy dissipation pool includes an inclined section and a water surface section. The inclined section is connected to the right side of the excavated material backfill area.
7. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 6, characterized in that: The inclined section of the energy dissipation pool is cast with an inclined bottom layer concrete structure and an inclined surface layer concrete structure in sequence.
8. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 7, characterized in that: A covering layer and a horizontal surface concrete structure are sequentially arranged on the water surface section of the energy dissipation pool. A plurality of drainage pipes are vertically inserted in the horizontal surface concrete structure. The bottom ends of the drainage pipes are in contact with the covering layer, and the upper ends pass through the horizontal surface concrete structure to communicate with the air.
9. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 8, characterized in that: The covering layer is composed of a basic geotextile, a coarse sand cushion layer and a crushed stone layer from bottom to top.
10. The anti-scouring protection structure for an inverted siphon pipe crossing a river in a water conservancy irrigation project according to claim 7, characterized in that: A buried stone concrete apron is provided downstream of the energy dissipation pool.