A gully management structure

Abstract

The invention discloses a gully management structure in the field of bank protection technology, comprising a river section; a gully section, the gully section is arranged on the first side of the river section; a diversion dike, the diversion dike is arranged on the first side of the river section; an anti-scouring dike, the anti-scouring dike is arranged on the second side of the river section and corresponds to the gully section; a grid bottom protection, the grid bottom protection is arranged between the diversion dike and the anti-scouring dike; the gully section comprises a flow stabilizing overflow trough, an anti-scouring foot and a gabion slope protection, the flow stabilizing overflow trough is arranged at the bottom of the gully section, the anti-scouring foot is arranged on both sides of the flow stabilizing overflow trough and connected to the diversion dike, the gabion slope protection is arranged on the side of the anti-scouring foot away from the flow stabilizing overflow trough, and the gabion slope protection extends to one side of the diversion dike. The invention stabilizes the gully terrain and collects incoming water through the anti-scouring foot and the gabion slope protection, and allows the incoming water to flow smoothly into the river section through the flow stabilizing overflow trough, which can reduce the turbulent kinetic energy of the water flow in the water collection area, thereby reducing the impact on the riverbed and the bank protection.

Description

Technical Field

[0001] The invention relates to the technical field of bank protection, and in particular to a gully management structure. Background Art

[0002] Mountain rivers have steep terrain, large natural drops and rich water resources. my country has built multi-level hydropower stations using mountain rivers as carriers to fully develop river water resources. Natural gullies of varying sizes and drops are often developed on both sides of mountain rivers. Mountain water carries a large amount of sediment and flows down, forming siltation or pits near the place where the gully merges into the river (hereinafter referred to as the gully head), affecting the evolution of the riverbed and constantly eroding and destroying the stability of the riverbed and bank slope at the intersection with the river. When the gully is close to the hydropower station, it will affect the realization of the functions of the hydropower station and its ancillary buildings, and also pose a threat to the personal safety of the staff.

[0003] The treatment of gullies mainly adopts the scheme of slope reinforcement and protection to reduce soil erosion along the way, or arranges multi-level energy dissipation measures along the gully path to reduce the kinetic energy of water flow, but pays little attention to the stability of the bank slope and riverbed at the head of the gully; for the treatment of gullies, it is necessary not only to consider the water flow energy dissipation, but also to comprehensively consider the protection of the bank slope and riverbed under the erosion of water flow confluence; common protection measures are to adopt falls of different heights to form multi-level falls to slow down the kinetic energy of water flow, or to build slope protection on both sides of the gully head to limit the development of the gully head, but the direction of the water flow from the gully is at a large angle to the direction of the river flow, and the water flows straight down. At the confluence of the water flow, the turbulent kinetic energy of the water flow is large, and even vortices are formed, carrying suspended sediment to repeatedly scour the bank protection and riverbed at the head of the gully, and causing the riverbed and bank slope to become unstable.

[0004] Therefore, how to reduce the impact of gully water flow and river water flow on the riverbed and bank slope when they meet has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a gully management structure to solve the technical problem that the intersection of existing gully water flow and river water flow easily leads to instability of riverbed and bank slope.

[0006] The technical solution adopted by the present invention is: a gully management structure, comprising:

[0007] river section;

[0008] a gully section, the gully section being disposed on a first side of the river channel section;

[0009] A diversion dike, the diversion dike being arranged on a first side of the river channel section;

[0010] An anti-scour guide dike, which is arranged on the second side of the river channel section and corresponds to the gully section;

[0011] A grid bottom protection, wherein the grid bottom protection is arranged between the diversion dike and the anti-scour dike;

[0012] Among them, the gully section includes a flow-stabilizing overflow trough, an anti-scouring dam and a gabion slope protection. The flow-stabilizing overflow trough is arranged at the bottom of the gully section, the anti-scouring dam is arranged on both sides of the flow-stabilizing overflow trough and connected to the diversion dike, the gabion slope protection is arranged on the side of the anti-scouring dam away from the flow-stabilizing overflow trough, and the gabion slope protection extends to one side of the diversion dike.

[0013] Preferably, reinforced concrete energy dissipation sills and flow-stabilizing energy dissipation thresholds are alternately provided at the bottom of the flow-stabilizing overflow trough along the water flow direction.

[0014] Preferably, the flow stabilizing overflow trough includes a horizontal bottom plate, an inclined bottom plate, an inlet side end wall and an outlet side end wall. The inclined bottom plate and the horizontal bottom plate are arranged between the anti-impact feet on both sides along the water flow direction, the inlet side end wall is arranged between the inclined bottom plate and the horizontal bottom plate along the vertical direction, and the outlet side end wall is arranged at the other end of the horizontal bottom plate along the vertical direction.

[0015] Preferably, a sand and gravel layer with a particle size of 0.10 to 0.12 m is arranged between two adjacent reinforced concrete energy dissipation sills, the flow stabilizing energy dissipation sill is arranged above the horizontal bottom plate, and the flow stabilizing energy dissipation sill includes a pavement layer and a steel grille layer, and the steel grille layer is arranged above the pavement layer and fixedly connected to the anti-impact footing and the reinforced concrete energy dissipation sill.

[0016] Preferably, the diversion dike includes a transition section, an arc section and a diversion section which are arranged in sequence, the transition section is arranged on both sides of the gully section and downstream of the flow stabilization overflow channel, the diversion section is arranged on the first side of the river channel section, and the arc section is connected between the transition section and the diversion section.

[0017] Preferably, a guide sill is provided on the guide section, and the angle between the guide sill and the direction of water flow is 15° to 30°.

[0018] Preferably, wave sills are provided on both sides of the anti-scour guide dike, and water holes are provided on the wave sills.

[0019] Preferably, the plurality of wave sills are arranged at intervals along the direction of water flow, and the plurality of wave sills are arranged at intervals from the bottom to the top of the anti-scour guide dike.

[0020] Preferably, the gridded bottom protection is a rough stone concrete structure, and vertical grid ridges and horizontal grid ridges are provided on the gridded bottom protection.

[0021] Beneficial effects of the present invention:

[0022] The present invention is provided with a flow-stabilizing overflow trough at the bottom of the gully section, and anti-scouring footings and gabion slope protections are provided on both sides of the flow-stabilizing overflow trough, which can stabilize the gully terrain and collect incoming water. A reinforced concrete energy dissipation sill and a flow-stabilizing energy dissipation threshold are provided at the bottom of the flow-stabilizing overflow trough, which can reduce the kinetic energy of the water flow and make the incoming water flow smoothly into the river section by overflow. The present invention is provided with a diversion dike and an anti-scouring dike on both sides of the river section, which can reduce the turbulent kinetic energy of the water flow in the catchment area through the diversion dike and the anti-scouring dike to divert and decelerate the water flow, thereby reducing the impact on the riverbed and the bank protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the gully management structure of the present invention;

[0024] Figure 2 It is a longitudinal section view of the steady flow overflow trough;

[0025] Figure 3 The bottom diagram of the trough is a flow stabilization trough;

[0026] Figure 4 It is the structural schematic diagram of the diversion dike;

[0027] Figure 5 is a cross-sectional view of the diversion dike;

[0028] Figure 6 This is a cross-sectional view of the flood-proof dike.

[0029] Description of reference numerals in the figures:

[0030] 1. River channel section; 2. Gully section; 3. Diversion dike; 4. Anti-scouring dike; 5. Grid bottom protection; 6. Flow stabilization overflow trough; 7. Anti-scouring footing; 8. Gabion slope protection; 9. Reinforced concrete energy dissipation sill; 10. Flow stabilization energy dissipation threshold; 11. Horizontal bottom plate; 12. Inclined bottom plate; 13. Inlet side end wall; 14. Outlet side end wall; 15. Sand and gravel layer; 16. Pavement layer; 17. Steel grille layer; 18. Transition section; 19. Arc section; 20. Diversion section; 21. Diversion threshold; 22. Wave threshold; 23. Water-passing hole; 24. Vertical lattice ridge; 25. Horizontal lattice ridge. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0035] Examples, such as Figure 1-Figure 6 As shown, a gully control structure comprises:

[0036] River section 1.

[0037] The gully section 2 is arranged on a first side of the river channel section 1 , and the gully section 2 is communicated with the river channel section 1 .

[0038] The diversion dike 3 is arranged on a first side of the river channel section 1 , and the diversion dike 3 is located on both sides of the gully section 2 .

[0039] The anti-scour guide dike 4 is arranged on the second side of the river channel section 1 , and the anti-scour guide dike 4 corresponds to the gully section 2 .

[0040] A gridded bottom protection 5 is provided between the dike 3 and the anti-scour dike 4 .

[0041] Among them, the gully section 2 includes a flow-stabilizing overflow trough 6, an anti-impact stabilizing foot 7 and a gabion slope protection 8. The flow-stabilizing overflow trough 6 is arranged at the bottom of the gully section 2, the anti-impact stabilizing foot 7 is arranged on both sides of the flow-stabilizing overflow trough 6 and is connected to the diversion dike 3, the gabion slope protection 8 is arranged on the side of the anti-impact stabilizing foot 7 away from the flow-stabilizing overflow trough 6, and the gabion slope protection 8 extends to one side of the diversion dike 3.

[0042] The present application provides a flow-stabilizing overflow trough 6 at the bottom of the gully section 2, and anti-scouring stabilizing feet 7 and gabion slope protection 8 on both sides of the flow-stabilizing overflow trough 6. The anti-scouring stabilizing feet 7 and gabion slope protection 8 can stabilize the gully terrain and collect incoming water, and make the incoming water from the gully section 2 flow smoothly into the river section 1 by overflow; the present application provides a diversion dike 3 and an anti-scouring guide dike 4 on both sides of the river section 1, and the diversion dike 3 and the anti-scouring guide dike 4 can divert and decelerate the incoming water, reduce the turbulent kinetic energy of the water flow in the catchment area, and thus reduce the impact on the riverbed and the bank protection.

[0043] In a specific embodiment, if Figure 2 , Figure 3 As shown, at the bottom of the flow stabilizing overflow trough 6, reinforced concrete energy dissipation sills 9 and flow stabilizing energy dissipation thresholds 10 are alternately arranged along the water flow direction.

[0044] This arrangement is because: a reinforced concrete energy dissipation sill 9 and a flow-stabilizing energy dissipation sill 10 are arranged at the bottom of the flow-stabilizing overflow trough 6. When the gully water flows into the flow-stabilizing overflow trough 6, the reinforced concrete energy dissipation sill 9 and the flow-stabilizing energy dissipation sill 10 can not only reduce the flow velocity of the incoming water, but also change the direction of the water flow, thereby reducing the kinetic energy of the gully water when it merges into the river channel.

[0045] Preferably, the flow-stabilizing overflow trough 6 includes a horizontal bottom plate 11, an inclined bottom plate 12, an inlet side end wall 13 and an outlet side end wall 14. The inclined bottom plate 12 and the horizontal bottom plate 11 are arranged between the anti-impact footings 7 on both sides along the direction of water flow, and the inclined bottom plate 12 is arranged upstream of the horizontal bottom plate 11. The inclined bottom plate 12 and the horizontal bottom plate 11 are fixedly connected to the waterside of the anti-impact footings 7 on both sides, and the inlet side end wall 13 is arranged between the inclined bottom plate 12 and the horizontal bottom plate 11 in the vertical direction, and the outlet side end wall 14 is arranged at the other end of the horizontal bottom plate 11 in the vertical direction, so that the entire flow-stabilizing overflow trough 6 is in the shape of an overflow box.

[0046] This arrangement is because: by arranging the inclined bottom plate 12 upstream of the horizontal bottom plate 11, the flow direction of the gully water can be changed so that the gully water flows into the steady flow overflow groove 6 as much as possible and overflows from the steady flow overflow groove 6, thereby reducing the kinetic energy of the gully water.

[0047] More preferably, a sand and gravel layer 15 with a particle size of 0.10 to 0.12 m is arranged between two adjacent reinforced concrete energy dissipation sills 9, and the flow stabilizing energy dissipation sill 10 is arranged above the horizontal bottom plate 11; the flow stabilizing energy dissipation sill 10 includes a pavement layer 16 and a steel grille layer 17, the pavement layer 16 is made of a mixture of straw ropes and wicker, and the steel grille layer 17 is arranged above the pavement layer 16 and fixedly connected to the anti-impact footing 7 and the reinforced concrete energy dissipation sill 9, so as to disrupt the flow direction of water.

[0048] This arrangement is because: the steel grating layer 17 is a porous structure, the steel grating bars can withstand the impact of gully water, reduce the kinetic energy of the water flow and disrupt the direction of the water flow, the straw ropes and willow branches of the pavement layer 16 can stabilize the flow state of the water, and the water flow on the outlet side of the steady flow overflow trough 6 is an overflow flow, which is conducive to the smooth entry of gully water into the river channel.

[0049] In a specific embodiment, if Figure 1 , Figure 4 As shown, the diversion dike 3 is arranged on the bank slope side of the outlet of the flow-stabilizing overflow channel 6, and the diversion dike 3 includes a transition section 18, an arc section 19 and a diversion section 20 arranged in sequence; the transition section 18 is arranged on both sides of the gully section 2 and is located downstream of the flow-stabilizing overflow channel 6, the diversion section 20 is arranged in parallel on the first side of the river section 1, and the arc section 19 is connected between the transition section 18 and the diversion section 20.

[0050] Preferably, a guide sill 21 is provided on the guide section 20. The guide sill 21 is in multiple numbers and is arranged at intervals along the direction of water flow. The angle between the guide sill 21 and the water flow direction is 15° to 30°.

[0051] This is done because: by providing the diversion sill 21 on the diversion section 20, the diversion sill 21 can guide the water flow to the center, so that the water on both sides of the river flow toward the middle of the river, thereby reducing the impact of the water on the bank slopes on both sides of the river.

[0052] In a specific embodiment, if Figure 1 , Figure 6 As shown, wave sills 22 are provided on both sides of the anti-scour guide dike 4, and water holes 23 are provided on the wave sills 22.

[0053] Preferably, the plurality of wave sills 22 are arranged at intervals along the direction of water flow, and the plurality of wave sills 22 are arranged at intervals from the bottom to the top of the anti-scour guide dike 4.

[0054] In a specific embodiment, if Figure 1 As shown, the grid bottom protection 5 is a rough stone concrete structure, and the grid bottom protection 5 is fixedly connected between the diversion dike 3 and the anti-scouring dike 4; vertical grid ridges 24 and horizontal grid ridges 25 are provided on the grid bottom protection 5, and the top elevations of the vertical grid ridges 24 and the horizontal grid ridges 25 are higher than the grid bottom protection 5, thereby playing a role in slowing down the water flow and protecting the grid bottom protection 5.

[0055] Specific embodiments, such as Figure 1-Figure 6 As shown, a gully control structure includes a river section 1, a gully section 2, a diversion dike 3, an anti-scouring dike 4 and a grid bottom protection 5.

[0056] The gully section 2 is located on the first side of the river section 1, and the downstream of the gully section 2 is connected to the river section 1; a flow stabilizing overflow trough 6 is provided at the bottom of the gully section 2, and the diversion dike 3 is arranged on both sides of the downstream of the flow stabilizing overflow trough 6, and the diversion dike 3 is smoothly connected to the flow stabilizing overflow trough 6; the anti-scour guide dike 4 is arranged on the second side of the river section 1, and the anti-scour guide dike 4 is directly opposite to the flow stabilizing overflow trough 6, and the top elevation and end point of the anti-scour guide dike 4 and the diversion dike 3 are the same; the gridded bottom protection 5 is fixedly connected between the diversion dike 3 and the bottom of the anti-scour guide dike 4.

[0057] Anti-scouring footings 7 are provided on both sides of the flow stabilizing overflow trough 6, and gabion slope protection 8 is provided on the side of the anti-scouring footings 7 away from the flow stabilizing overflow trough 6, and the gabion slope protection 8 extends to one side of the diversion dike 3; the width of the flow stabilizing overflow trough 6 (perpendicular to the direction of gully water flow) is not less than 3m, the top elevation of the anti-scouring footings 7 on both sides of the flow stabilizing overflow trough 6 has no slope drop along the way, and the cross-section of the anti-scouring footings 7 is a right-angled trapezoid, the top width of the right-angled trapezoid is not less than 1.5m, the height is not less than 3.6m, and the anti-scouring footings 7 are located below the horizontal bottom plate 11 of the flow stabilizing overflow trough 6 with a burial depth of not less than 1.5m; the water side of the anti-scouring footings 7 is a vertical structure, and the soil side slope ratio is 1:0.4, and the anti-scouring footings 7 on both sides are connected with the two sides of the gully through the gabion slope protection 8.

[0058] The flow-stabilizing overflow trough 6 includes a horizontal bottom plate 11, an inclined bottom plate 12, an inlet side end wall 13 and an outlet side end wall 14, which are cast with rubble concrete. The inclined bottom plate 12 is arranged upstream of the horizontal bottom plate 11, and the downstream end of the inclined bottom plate 12 is fixedly connected to the top of the inlet side end wall 13. The horizontal bottom plate 11 is arranged between the inlet side end wall 13 and the outlet side end wall 14, and the two ends of the horizontal bottom plate 11 are fixedly connected to the bottom ends of the inlet side end wall 13 and the outlet side end wall 14 one by one.

[0059] The slope ratio of the inclined bottom plate 12 is not less than 1:5, the length of the horizontal bottom plate 11 is not less than 8m, and a reinforced concrete energy dissipation sill 9 is arranged at intervals of 1.9m on the horizontal bottom plate 11, and a sand and gravel layer 15 with a particle size of 0.10-0.12m is interspersed between two adjacent reinforced concrete energy dissipation sills 9; both sides of the reinforced concrete energy dissipation sill 9 are chamfered structures with a radius of 0.3m, the middle part is a horizontal section with a length of 0.2m, and the number of reinforced concrete energy dissipation sills 9 on the horizontal bottom plate 11 is not less than 3; the part of the sand and gravel layer 15 exposed above the horizontal bottom plate 11 does not exceed 0.06m, and is distributed in a plum blossom shape.

[0060] A plurality of flow stabilizing energy dissipating sills 10 are arranged at intervals on the horizontal bottom plate 11, and the flow stabilizing energy dissipating sills 10 include a pavement layer 16 and a steel grille layer 17. The steel grille layer 17 is arranged above the pavement layer 16, and the pavement layer 16 is made of a mixture of straw ropes and wicker branches. The four ends of the steel grille layer 17 are respectively cast in the anti-collision footing 7, the inlet side end wall 13, the outlet side end wall 14 and the reinforced concrete energy dissipating sill 9.

[0061] The outlet side end wall 14 is a rough stone concrete structure and an L-shaped retaining wall structure, connected with the horizontal bottom plate 11 of the flow stabilizing overflow trough 6 and the anti-impact footing 7, wherein the inlet side end wall 13 is no more than 1m higher than the horizontal bottom plate 11, and the outlet side end wall 14 is not less than 0.6m higher than the horizontal bottom plate 11.

[0062] The diversion dike 3 is connected with the outlet side end wall 14 of the flow stabilizing overflow channel 6. After the gully water dissipates energy and stabilizes the flow through the flow stabilizing overflow channel 6, it overflows through the outlet side end wall 14 and enters between the two diversion dikes 3. The cross section of the diversion dike 3 is a trapezoidal structure, made of rubble concrete, with a top width of not less than 1.5m, a slope ratio of 1:0.4 on both sides, and the same elevation along the way; the diversion dike 3 includes a transition section 18, an arc section 19 and a diversion section 20 arranged in sequence, and the diversion dike 3 is an asymmetric structure, the length of the downstream side transition section 18 is not less than 1.5m, the radius of the downstream side arc section 19 is not less than 5m, the length of the upstream side transition section 18 is 1m longer than that of the downstream section, and the radius of the upstream side arc section 19 is 1m smaller than that of the downstream side arc section, so as to facilitate the use of the arc section to guide the gully water to flow to the downstream side.

[0063] The diversion section 20 is straight, and the diversion section 20 is connected with the arc section 19. The diversion section 20 is about 1.5m higher than the grid bottom protection 5. The downstream diversion section 20 and the upstream diversion section 20 are both provided with a diversion sill 21; the height of the diversion sill 21 is 1.0m, and the top of the diversion sill 21 is 0.5m away from the top surface of the diversion dike 3. The diversion sill 21 is a trapezoidal reinforced concrete structure, and the diversion sill 21 and the diversion dike 3 are cast as one piece; the diversion sill 21 protruding from the diversion dike 3 has a top width of 0.7m and a bottom width of 0.3m, and an angle with the direction of the water flow of the river channel is between 15° and 30°, and is used to guide the water flow to the river channel side.

[0064] The cross-section of the anti-scour guide embankment 4 is trapezoidal, the length of the anti-scour guide embankment 4 is not less than 60m, the top width is not less than 1.5m, and the slope ratio on both sides is 1:0.4; the anti-scour guide embankment 4 is a rubble concrete structure, and the side facing the gully is fixedly connected to the diversion embankment 3 through a grid bottom protection 5, and the bottom of the anti-scour guide embankment 4 facing the river is buried in the riverbed for not less than 0.8m.

[0065] The wave sill 22 is located on both sides of the anti-scouring dike 4, and the wave sill 22 is arranged at intervals of 0.3m along the height direction of the anti-scouring dike 4, and the total number is not less than 3; the height of the wave sill 22 is 0.2m, and the length of the part protruding from the anti-scouring dike 4 does not exceed 0.3m. Each wave sill 22 is 3m long and is arranged at intervals of 3m along the water flow direction. The bottom wave sill 22 is 0.2m away from the grid bottom protection 5 to reserve a water flow space. The lower part of the wave sill 22 is a chamfer with a radius of 0.1m, which is convenient for guiding the top flushing water flow from the gully to diffuse. The upper part is in a right angle form. Water holes 23 with a diameter of no more than 0.05m are arranged at intervals of 0.3m on the wave sill 22 to reduce the water flow top flushing pressure on the wave sill 22 through the water holes 23.

[0066] The grid bottom protection 5 is located between the diversion dike 3 and the anti-scour dike 4 and within 5m at both ends of the riverbed connection. The grid bottom protection 5 is a rough stone concrete structure. The top of the grid bottom protection 5 is roughened to increase the roughness. Vertical grid ridges 24 and horizontal grid ridges 25 are arranged on the grid bottom protection 5. The top elevations of the vertical grid ridges 24 and the horizontal grid ridges 25 are about 0.1m higher than the grid bottom protection 5, which play a role in slowing down the water flow and protecting the grid bottom protection 5.

[0067] Compared with the prior art, this application has at least the following beneficial technical effects:

[0068] (1) Gather gully water flow, weaken the kinetic energy of gully water, and stabilize the flow state of water. This application is equipped with anti-scour ballasts on both sides of the gully, and with gabion slope protection, which can ensure that the gully terrain can be stabilized and the water can be gathered even when the gully water is large during the flood season; a stabilizing flow energy dissipation threshold is set at the bottom of the stabilizing overflow trough, and the steel grating layer on the top of the stabilizing flow energy dissipation threshold is a porous structure. The steel grating bars bear the impact of gully water, which can reduce the kinetic energy of water and disrupt the direction of water flow. The pavement layer made of straw ropes and willow branches under the steel grating layer is used to stabilize the flow state of water. The outlet side of the stabilizing flow overflow trough is an overflow flow, which is conducive to the smooth entry of gully water into the diversion area.

[0069] (2) Guide the flow direction of gully water, merge it into the river channel smoothly, and stabilize the riverbed at the gully head. The water from the gully often has a certain angle with the flow direction of the river channel it merges into. When the gully water is large during the flood season, the water flows straight down and merges with the river channel water flow, destroying the stability of the riverbed at the gully head. In this application, diversion dikes and anti-scouring dikes are provided to change the flow direction of gully water, reduce the flow velocity, guide the convergence level to merge into the river channel smoothly, reduce the turbulent kinetic energy of the water flow in the water catchment area, limit the gully head water flow from scouring the riverbed, and stabilize the river flow.

[0070] (3) Stabilize the bank slope and limit the development of erosion at the gully head. The diversion embankment, flow stabilization overflow channel and anti-scouring footing are connected to the existing gully banks through gabion slope protection, which plays a protective and anti-scouring role on the gully bank slope. A diversion sill is set on the diversion embankment to guide the water flow away from the gully bank slope. An anti-scouring embankment and a grid bottom protection are set on the outside to prevent river floods from scouring the gully near-shore bank slope during the flood season, stabilize the bank slope at the gully head, and limit the gully erosion toward the nearshore.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A gully management structure, characterized in that: include: River section (1); A gully section (2), wherein the gully section (2) is arranged on a first side of the river channel section (1); A diversion dam (3), wherein the diversion dam (3) is arranged on a first side of the river channel section (1); An anti-scour guide dike (4), the anti-scour guide dike (4) being arranged on the second side of the river channel section (1) and corresponding to the gully section (2); A gridded bottom protection (5), wherein the gridded bottom protection (5) is arranged between the diversion dike (3) and the anti-scour dike (4); The gully section (2) comprises a flow stabilizing overflow trough (6), an anti-scouring foot (7) and a gabion slope protection (8); the flow stabilizing overflow trough (6) is arranged at the bottom of the gully section (2); the anti-scouring foot (7) is arranged on both sides of the flow stabilizing overflow trough (6) and connected to the diversion dike (3); the gabion slope protection (8) is arranged on the side of the anti-scouring foot (7) away from the flow stabilizing overflow trough (6), and the gabion slope protection (8) extends to one side of the diversion dike (3); The flow stabilizing overflow trough (6) comprises a horizontal bottom plate (11), an inclined bottom plate (12), an inlet side end wall (13) and an outlet side end wall (14); the inclined bottom plate (12) and the horizontal bottom plate (11) are arranged between the anti-collision footings (7) on both sides along the water flow direction; the inlet side end wall (13) is arranged between the inclined bottom plate (12) and the horizontal bottom plate (11) along the vertical direction; and the outlet side end wall (14) is arranged at the other end of the horizontal bottom plate (11) along the vertical direction; A reinforced concrete energy dissipation sill (9) and a flow-stabilizing energy dissipation sill (10) are alternately arranged at the bottom of the flow-stabilizing overflow trough (6) along the direction of water flow, a sand and gravel layer (15) with a particle size of 0.10 to 0.12 m is arranged between two adjacent reinforced concrete energy dissipation sills (9), the flow-stabilizing energy dissipation sill (10) is arranged above the horizontal bottom plate (11), and the flow-stabilizing energy dissipation sill (10) comprises a pavement layer (16) and a steel grille layer (17), and the steel grille layer (17) is arranged above the pavement layer (16) and is fixedly connected to the anti-collision footing (7) and the reinforced concrete energy dissipation sill (9).

2. A gully management structure according to claim 1, characterized in that: The diversion dam (3) comprises a transition section (18), an arc section (19) and a diversion section (20) which are arranged in sequence, wherein the transition section (18) is arranged on both sides of the gully section (2) and is located downstream of the flow stabilization overflow channel (6), the diversion section (20) is arranged on the first side of the river channel section (1), and the arc section (19) is connected between the transition section (18) and the diversion section (20).

3. A gully management structure according to claim 2, characterized in that: The diversion section (20) is provided with a diversion sill (21), and the angle between the diversion sill (21) and the direction of water flow is 15° to 30°.

4. A gully management structure according to claim 1, characterized in that: Wave sills (22) are provided on both sides of the anti-scour guide dike (4), and water holes (23) are provided on the wave sills (22).

5. A gully management structure according to claim 4, characterized in that: The plurality of wave sills (22) are arranged at intervals along the direction of water flow, and the plurality of wave sills (22) are arranged at intervals from the bottom to the top of the anti-scour guide dike (4).

6. A gully management structure according to claim 1, characterized in that: The gridded bottom protection (5) is a rough stone concrete structure, and a vertical grid ridge (24) and a horizontal grid ridge (25) are provided on the gridded bottom protection (5).

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