Navigation safety maintenance method for junction of canal main flow and branch flow

Abstract

The navigation safety maintenance method is characterized in that energy dissipation treatment is conducted on river water of a canal branch before the river water flows into a main stream, the river water is guided to change the direction when the river water flows out of the branch, and the river water deflects towards the downstream direction and flows into the canal main stream. According to the method, the transverse flow velocity of the channel in the cross-basin canal main and tributary intersection area can be reduced, the channel water flow direction is adjusted to achieve the effect of improving the poor flow state of the intersection area, and the navigation safety of the artificial canal main and tributary river channel intersection is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterway navigation safety assurance, and in particular to a method for maintaining navigation safety at the confluence of a canal main stream and tributary streams. Background Art

[0002] At the confluence of the main and tributary rivers, the tributary water often rushes into the main river channel, forming an impact, causing a large number of hydrological phenomena such as transverse waves, surges, and vortices, which affect the navigation safety of passing ships. It is necessary to take measures to ensure navigation safety. Especially for canal rivers, since they are navigable rivers that are artificially dug according to the required path to meet the navigation needs, there is often a situation where the tributary water volume exceeds the main river water volume. In this way, when the tributary water rushes into the main river channel, it will form a very large impact effect, greatly affecting the navigation safety at the confluence of the main and tributary rivers.

[0003] CN202211314762.X has disclosed a method for navigation at the estuary section of a tidal river section where a tidal gate has been built, which is characterized in that a ship lock is set at the nearshore end of the tidal gate of the tributary river channel, and the connection between the nearshore side of the tributary river channel estuary and the main river channel is rounded into an arc-shaped fillet, and an arc-shaped pilot channel is formed along the fillet. When navigating during high tide, the ship is guided along the arc of the pilot channel to bypass the nearshore side of the tributary river channel estuary. The invention has the ability to better avoid the influence of crossflow at the intersection of tributary rivers, greatly improving the safety of navigation. However, this solution is mainly suitable for tidal river sections close to the sea, and is not suitable for artificial canals.

[0004] Therefore, how to provide a technology that can improve the navigation safety at the confluence of the main and tributary rivers of artificial canals has become a problem that technical personnel in this field need to consider and solve. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a method for maintaining navigation safety at the intersection of main and tributary rivers of an artificial canal, which can improve the navigation safety at the intersection of main and tributary rivers of the canal.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for maintaining navigation safety at the intersection of a canal main stream and tributaries, characterized in that the river water of the canal tributaries is subjected to energy dissipation treatment before flowing into the main stream and is guided to change direction when flowing out of the tributaries, so that the water is deflected in a downstream direction and flows into the canal main stream.

[0007] In this way, the tributary river water is dissipated and then guided to change its flow direction toward the downstream to flow into the mainstream river channel, which greatly avoids the impact of the tributary river water on the mainstream river channel and better ensures the navigation safety of the mainstream river channel.

[0008] Furthermore, the surface water of the tributary river channel is subjected to wave-breaking and wave-dissipating treatment, the middle and upper layer water is subjected to impact energy dissipation treatment, and the lower layer water is guided to deflect the water toward the downstream of the main stream and flow into the main stream channel.

[0009] In this way, different methods are used to treat river water at different heights. The surface river water is broken and wave-dissipated, and the middle and upper river water is impacted and energy-dissipated, consuming the kinetic energy of the upper river water, ensuring the stability of the upper water flow at the intersection to the greatest extent, so as to improve navigation safety. Then the river water at the bottom of the lower layer is guided to divert and flow downward into the main river channel, ensuring the timely dredging of the tributary river water and reducing the impact on the upper river water.

[0010] Furthermore, the present method is implemented by means of a main and tributary river diversion embankment system, which includes a embankment body arranged downward along the estuary direction at the upstream end of the tributary river mouth, a wave-breaking and wave-breaking structure is arranged on the upper end surface of the embankment body at the river surface, an impact energy dissipation structure is arranged at the middle and upper position of the embankment body, a diversion device is arranged at the lower position of the embankment body, and the lower end of the embankment body is fixed to the bottom of the riverbed by means of a downward fixed foundation.

[0011] In this way, different structures are set up at different positions on a diversion dike, so that it can break and eliminate waves on the surface water of the tributary, impact and dissipate energy on the middle and upper water, and guide and discharge the lower water. Therefore, it can well avoid the impact of tributary water directly pouring into the main stream, ensure the stability of the upper water flow of the main stream at the estuary, greatly improve the safety of navigation, and the system itself has the advantages of simple structure, easy construction, and low cost.

[0012] Furthermore, a gap is left between the far bank end of the embankment and the downstream end of the tributary river mouth.

[0013] In this way, only a part of the river water on the upstream side of the tributary river channel is dissipated and guided, which can reduce obstacles and allow the tributary river water to flow into the main stream better. At the same time, after the upstream side of the river water is deflected and directed toward the downstream end of the main stream, it will collide with and guide the downstream side of the river water to also deflect toward the downstream direction of the main stream, so as to ensure the safety of the main stream estuary.

[0014] Furthermore, the breaking and wave-breaking structure comprises a plurality of support frames with upward pointed ends which are triangular in cross-section and arranged at intervals along the length direction of the embankment. The upper end and two corner positions of the support frames are respectively fixed on a support beam arranged along the length direction of the embankment. One or more inner beams are also arranged in parallel in the same direction inside the three support beams. The inner beams are fixed to the three support beams by connecting ribs along the cross-sectional direction.

[0015] In this way, the river surface waves enter the support beams arranged in a triangular shape, and collide back and forth with the support beams, inner beams and support frames to achieve wave breaking and wave elimination, which can absorb and eliminate most of the surface wave energy of the river, and interfere with the normal movement trajectory of the surface water body, causing the surface water body to become turbulent, thereby reducing the wave height and achieving the effect of surface energy dissipation. Therefore, the stability of the water surface at the intersection of the river channel is better guaranteed, and the safety impact of the river surface waves on the navigation is eliminated.

[0016] Furthermore, a plurality of openings extending from left to right are provided on the support frame, so that the effect of breaking and eliminating waves can be better achieved.

[0017] Furthermore, the impact energy dissipation structure includes energy dissipation frames stacked in multiple layers up and down, the energy dissipation frames are rectangular frame structures with hollowed-out sides on the front and rear sides, each layer of energy dissipation frames has multiple energy dissipation frames along the length direction of the embankment, and energy dissipation baffles are vertically fixed inside the energy dissipation frames along the water-facing surface direction.

[0018] In this way, the river water in the middle and upper parts of the tributary river hits the embankment, is divided into each energy dissipation frame, and then is blocked by the energy dissipation baffle and rebounds and hits back and forth in the energy dissipation frame to achieve energy dissipation, which has the advantages of simple structure and good energy dissipation effect. After the energy dissipation treatment of the middle and upper river water is achieved, the stability of the water body in the upper part of the main river channel at the intersection is better guaranteed, and the safety of navigation is guaranteed. In this way, the main component of the embankment body is a frame structure box stacking and assembly, which can also reduce the weight of the embankment body, facilitate prefabrication and dismantling, and reduce costs. The permeable box body can increase the boundary resistance of the water flow to achieve a better energy dissipation effect. The box body can be made of high-density polyethylene material, and embankments of different heights and lengths can be flexibly built according to actual needs.

[0019] Further, as a structural option, the energy dissipation baffle is a whole piece that matches the length of the energy dissipation frame and forms a front and rear partition arrangement along the interior of the energy dissipation frame.

[0020] This structure is simple and can completely block the upper water flow of the tributary, so that the water-facing chamber of the energy dissipation baffle can be hit by water flow to achieve energy dissipation, while the back-water chamber can keep the water flow stable to form a functional space for fish to live, hide, forage, spawn, etc., providing a function similar to an ecological fish reef. This structure is suitable for the case of small tributary water volume.

[0021] As another structural option, there are three energy dissipation baffles, two of which are arranged in parallel and spaced apart at the two ends of the inner cavity of the energy dissipation frame at the rear position along the length direction (here the water-facing direction is defined as the front, and the opposite direction is defined as the rear), and the other is arranged at the front side position between the two rear energy dissipation baffles and the projection in the front-to-back direction can shield the space between the two rear energy dissipation baffles.

[0022] In this way, after the upper water flow of the tributary collides with the energy dissipation baffle in the energy dissipation frame and dissipates energy, it can flow into the main river channel more smoothly through the energy dissipation frame without hindering the water flow, which is more suitable for implementation in the case of large tributary water volume. At the same time, the three baffles inside the energy dissipation frame are arranged in a triangular shape, and the water-passing interval formed between the two rear energy dissipation baffles is located exactly in the middle behind the front baffle. In this way, the tributary river water enters the energy dissipation frame and first hits the front baffle, and is forced to separate to the sides to cross the intervals on both sides of the front baffle and enter the position between the front baffle and the rear baffle, and then converges to the middle position between the front and rear baffles again and collides with each other, and then flows out from the interval between the two rear baffles. In this way, in addition to being guided to collide with the baffle and the inner cavity of the energy dissipation frame, the river water is also guided to collide with each other when the diversion closes again, and then flows out, which greatly improves the impact energy dissipation effect on the water flow, making it more suitable for implementation in the case of large tributary water volume.

[0023] Furthermore, the upper and lower surfaces of the energy dissipation frame are provided with concave and convex matching plug-in structures, which is more conducive to the stacking and fixing of the energy dissipation frame, and convenient for adjusting the height of the embankment body according to the fluctuation of the water level.

[0024] Furthermore, the diversion device includes a plurality of vertically arranged columns which are spaced apart at the lower part of the embankment along the length direction of the embankment, and a space is formed between the columns for the river water to flow through. A downward fixed foundation is arranged at the lower end of the columns, and a vertical guide plate is installed on each column. The guide plate is arranged in a direction which is deflected at a certain angle as a whole toward the downstream of the main stream along the direction of outflow of the tributary.

[0025] In this way, after the lower river water of the tributary passes through the pillars, it is acted upon and guided by the guide plate and deviates toward the downstream direction of the main stream, thus better avoiding the impact and influence on the confluence of the main river channel and improving navigation safety.

[0026] Furthermore, the length of the guide plate is greater than the distance between adjacent columns, and has a tail portion extending obliquely out of the embankment body along the direction of water flow.

[0027] In this way, the diversion effect can be better achieved.

[0028] Furthermore, the end of the guide plate facing the water is arc-shaped and the horizontal cross section is wing-shaped with a thick front and a thin rear. In this way, the impact force of the water flow on the guide plate itself can be better reduced and the service life can be extended.

[0029] As a kind of installation structure of the deflector, the deflector is rotatably mounted on the column through a sleeve-type rotating shaft, and a sprocket is fixedly mounted on the upper end of each rotating shaft, and a transmission chain is arranged outside each sprocket, and the transmission chain is connected to a waterproof motor. In this way, the advantage is that the deflection angle of the deflector can be adjusted by the waterproof motor when necessary. The disadvantage is that the structure is more complicated and the stability is relatively poor.

[0030] As another installation structure, the guide plates are fixedly installed on the columns, and the angle between each guide plate and the water outlet direction of the tributary gradually increases from the far shore end to the near shore end.

[0031] In this way, the guide plate is fixedly installed, and the structure is simpler and more stable. At the same time, the angle between each guide plate and the water outflow direction of the tributary gradually increases from the far shore end to the near shore end. This is because the guide plate at the far shore end is located in the middle of the river and is subject to a greater impact of the water flow. Therefore, adjusting the angle to be smaller can better mitigate the impact. The guide plate at the near shore end is located at the edge of the river and is less impacted by the water flow. Therefore, the angle can be adjusted to increase, so that it drives the river water on one side of the upstream end of the tributary to flow out of the tributary and deviate more significantly toward the downstream end of the main stream. Then, relying on this part of the river water, the remaining middle part of the river water that is less guided can also be deviated at a larger angle toward the downstream end of the main stream. Therefore, on the premise of better ensuring the stability of the guide plate itself, the offset guiding effect of the tributary river water outflow is better guaranteed.

[0032] Furthermore, the guide plate is made of elastic rubber material as a whole and a circle of metal frame is embedded in the edge position.

[0033] In this way, when the guide plate is impacted by water flow, it can not only rely on its own elastic deformation to better maintain stability, but also the key is that the metal frame at the edge position is set so that the water-facing surface in the middle position will form an inward depression when impacted by water flow. This depression will change the direction of water flow out of the guide plate, and the greater the impact force of the water flow, the larger the depression, and the more the water flow out of the guide plate will deviate toward the downstream direction of the main stream. Therefore, it has the effect of adaptive adjustment according to the impact force of the water flow. The greater the impact force, the better the effect of diverting water toward the downstream direction of the main stream.

[0034] Furthermore, the fixed foundation includes a chassis arranged at the lower end of each column, and a plurality of vertical bars embedded in the riverbed are arranged downward from the lower end of each chassis, so that better fixation can be achieved.

[0035] In summary, the present invention can reduce the lateral flow velocity of the waterway in the confluence area of ​​the main and tributary rivers of the cross-basin canal and adjust the water flow direction of the waterway to achieve the effect of improving the adverse flow state in the confluence area, greatly improving the navigation safety at the confluence of the main and tributary rivers of the artificial canal. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the main and tributary river diversion dike system used in the implementation of the present invention.

[0037] Figure 2 for Figure 1 Top view of the .

[0038] Figure 3 for Figure 1 Left view of .

[0039] Figure 4 for Figure 1 Schematic diagram of the layout structure of the main and tributary river diversion dike system at the confluence of the main and tributary rivers. In the figure, the horizontal river channel is the main stream, the oblique river channel is the tributary, and the arrow indicates the direction of water flow.

[0040] Figure 5 Schematic diagram of the structural arrangement of the energy dissipation baffle inside the energy dissipation frame in another possible implementation manner, the figure is a top view. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with specific implementation modes and accompanying drawings.

[0042] Best implementation method: A method for maintaining navigation safety at the confluence of a canal main stream and tributaries, characterized in that the river water from the canal tributaries is subjected to energy dissipation treatment before flowing into the main stream and is guided to change direction when flowing out of the tributaries, so that the water is deflected in a downstream direction and flows into the main stream of the canal.

[0043] In this way, the tributary river water is dissipated and then guided to change its flow direction toward the downstream to flow into the mainstream river channel, which greatly avoids the impact of the tributary river water on the mainstream river channel and better ensures the navigation safety of the mainstream river channel.

[0044] During implementation, the surface water in the tributary river channel is treated by breaking up and eliminating waves, the middle and upper layer water is treated by impact energy dissipation, and the lower layer water is guided to deflect the water toward the downstream direction of the main stream and flow into the main stream channel.

[0045] In this way, different methods are used to treat river water at different heights. The surface river water is broken and wave-dissipated, and the middle and upper river water is impacted and energy-dissipated, consuming the kinetic energy of the upper river water, ensuring the stability of the upper water flow at the intersection to the greatest extent, so as to improve navigation safety. Then the river water at the bottom of the lower layer is guided to divert and flow downward into the main river channel, ensuring the timely dredging of the tributary river water and reducing the impact on the upper river water.

[0046] In this embodiment, the method is implemented by a diversion dike system for a main and tributary river channel, the diversion dike system for the main and tributary river channel, see Figure 1-4 , including a dike 1 arranged downward along the estuary direction at the upstream end of the tributary river estuary, the upper end surface of the dike 1 is located at the river surface and is provided with a breaking and wave-breaking structure, the upper and middle part of the dike is provided with an impact energy dissipation structure, the lower part of the dike is provided with a diversion device, and the lower end of the dike is fixed to the bottom of the riverbed by relying on a downward fixed foundation.

[0047] In this way, different structures are set up at different positions on a diversion dike, so that it can break and eliminate waves on the surface water of the tributary, impact and dissipate energy on the middle and upper water, and guide and discharge the lower water. Therefore, it can well avoid the impact of tributary water directly pouring into the main stream, ensure the stability of the upper water flow of the main stream at the estuary, greatly improve the safety of navigation, and the system itself has the advantages of simple structure, easy construction, and low cost. In other embodiments, other structures of main and tributary river diversion embankment systems can also be used to implement the present method. For example, a floating device with a breaking and wave-breaking structure is first used to break and eliminate waves on the surface water of the tributary river; then a floating embankment with an impact energy dissipation structure on the upper part and a hollow design on the lower part is used to perform impact energy dissipation treatment on the middle and upper river water; finally, a plurality of guide plates vertically arranged at the outlet of the tributary river are used to guide the tributary river water as a whole so that it is deflected in the direction of the downstream of the main stream and flows into the main river channel, which also falls within the scope of the present method of the main and tributary river diversion embankment system.

[0048] In other possible implementations, the method can also be implemented by relying on other hydraulic equipment. For example, an energy dissipation hydraulic facility is first set up at the upstream end of the tributary near the estuary to dissipate energy of the tributary river water, and then a diversion hydraulic facility is set up at the downstream end to guide the tributary river water so that it is diverted toward the downstream end of the main stream and then flows into the main stream.

[0049] In this embodiment, a gap is left between the far bank end of the embankment 1 and the downstream end of the tributary river estuary.

[0050] In this way, only a part of the river water on the upstream side of the tributary river channel is dissipated and guided, which can reduce obstacles and allow the tributary river water to flow into the main stream better. At the same time, after the upstream side of the river water is deflected and directed toward the downstream end of the main stream, it will collide with and guide the downstream side of the river water to also deflect toward the downstream direction of the main stream, so as to ensure the safety of the main stream estuary.

[0051] Among them, the breaking and wave-breaking structure includes a plurality of support frames 2 with upward pointed ends which are triangular in cross-section and arranged at intervals along the length direction of the embankment. The upper end and two corner positions of the support frames 2 are respectively fixed on a support beam 3 arranged along the length direction of the embankment. One or more inner beams 4 are also arranged in parallel in the same direction inside the three support beams 3. The inner beams 4 are fixed to the three support beams 3 by connecting ribs along the cross-sectional direction.

[0052] In this way, the river surface waves enter the support beams arranged in a triangular shape, and collide back and forth with the support beams, inner beams and support frames to achieve wave breaking and wave elimination, which can absorb and eliminate most of the surface wave energy of the river, and interfere with the normal movement trajectory of the surface water body, causing the surface water body to become turbulent, thereby reducing the wave height and achieving the effect of surface energy dissipation. Therefore, the stability of the water surface at the intersection of the river channel is better guaranteed, and the safety impact of the river surface waves on the navigation is eliminated.

[0053] Among them, a plurality of openings that penetrate left and right are arranged on the support frame 2. In this way, the effect of breaking and eliminating waves can be better achieved.

[0054] Among them, the impact energy dissipation structure includes energy dissipation frames 5 which are stacked up and down in multiple layers. The energy dissipation frames 5 are rectangular frame structures with hollowed-out sides on the front and rear sides. Each layer of energy dissipation frames 5 has multiple energy dissipation frames along the length direction of the embankment body. Energy dissipation baffles 6 are vertically fixed inside the energy dissipation frames 5 along the water-facing surface direction.

[0055] In this way, the river water in the middle and upper parts of the tributary river hits the embankment, is divided into each energy dissipation frame, and then is blocked by the energy dissipation baffle and rebounds and hits back and forth in the energy dissipation frame to achieve energy dissipation, which has the advantages of simple structure and good energy dissipation effect. After the energy dissipation treatment of the middle and upper river water is achieved, the stability of the water body in the upper part of the main river channel at the intersection is better guaranteed, and the safety of navigation is guaranteed. In this way, the main component of the embankment body is a frame structure box stacking and assembly, which can also reduce the weight of the embankment body, facilitate prefabrication and dismantling, and reduce costs. The permeable box body can increase the boundary resistance of the water flow to achieve a better energy dissipation effect. The box body can be made of high-density polyethylene material, and embankments of different heights and lengths can be flexibly built according to actual needs.

[0056] In this embodiment, as a structural option, the energy dissipation baffle 6 is a whole piece that matches the length of the energy dissipation frame 5 and is arranged along the interior of the energy dissipation frame to form a front and rear partition.

[0057] This structure is simple and can completely block the upper water flow of the tributary, so that the water-facing chamber of the energy dissipation baffle can be hit by water flow to achieve energy dissipation, while the back-water chamber can keep the water flow stable to form a functional space for fish to live, hide, forage, spawn, etc., providing a function similar to an ecological fish reef. This structure is suitable for the case of small tributary water volume.

[0058] In another embodiment, as another structural option, see Figure 5 The energy dissipation baffle 6 can be set to three pieces, two of which are arranged in parallel and spaced at the two ends of the inner cavity of the energy dissipation frame 5 in the rear direction along the length direction (here the water-facing direction is defined as the front and the opposite direction is defined as the rear), and the other piece is arranged at a distance in front of the two rear energy dissipation baffles and the projection in the front-to-back direction can shield the space between the two rear energy dissipation baffles.

[0059] In this way, after the upper water flow of the tributary collides with the energy dissipation baffle in the energy dissipation frame and dissipates energy, it can flow into the main river channel more smoothly through the energy dissipation frame without hindering the water flow, which is more suitable for implementation in the case of large tributary water volume. At the same time, the three baffles inside the energy dissipation frame are arranged in a triangular shape, and the water-passing interval formed between the two rear energy dissipation baffles is located exactly in the middle behind the front baffle. In this way, the tributary river water enters the energy dissipation frame and first hits the front baffle, and is forced to separate to the sides to cross the intervals on both sides of the front baffle and enter the position between the front baffle and the rear baffle, and then converges to the middle position between the front and rear baffles again and collides with each other, and then flows out from the interval between the two rear baffles. In this way, in addition to being guided to collide with the baffle and the inner cavity of the energy dissipation frame, the river water is also guided to collide with each other when the diversion closes again, and then flows out, which greatly improves the impact energy dissipation effect on the water flow, making it more suitable for implementation in the case of large tributary water volume.

[0060] In this embodiment, the upper and lower surfaces of the energy dissipation frame 5 are provided with concave-convex matching plug-in structures 7. This is more conducive to the stacking and fixing of the energy dissipation frame, and is convenient for increasing or decreasing the height of the embankment according to the fluctuation of the water level.

[0061] Among them, the diversion device includes a plurality of columns 8 which are vertically arranged and spaced apart at the lower part of the embankment along the length direction of the embankment. Space intervals are formed between the columns 8 for river water to flow through. A downward fixed foundation is arranged at the lower end of the column. A vertical guide plate 9 is also installed on each column. The guide plate 9 is arranged in a direction that is deflected at a certain angle as a whole toward the downstream of the main stream along the direction of outflow of the tributary.

[0062] In this way, after the lower river water of the tributary passes through the pillars, it is acted upon and guided by the guide plate and deviates toward the downstream direction of the main stream, thus better avoiding the impact and influence on the confluence of the main river channel and improving navigation safety.

[0063] The length of the guide plate 9 is greater than the distance between adjacent columns, and has a tail portion extending obliquely out of the embankment body along the direction of water flow.

[0064] In this way, the diversion effect can be better achieved.

[0065] The end of the guide plate 9 facing the water is arc-shaped and the horizontal cross section is wing-shaped with a thick front and a thin back. In this way, the impact force of the water flow on the guide plate itself can be better reduced and the service life can be extended.

[0066] In other possible implementations, as a mounting structure of the guide plate, the guide plate can be rotatably mounted on the column through a sleeve-type rotating shaft, and a sprocket is fixedly mounted on the upper end of each rotating shaft, and a transmission chain is connected to the outer side of each sprocket, and the transmission chain is connected to a waterproof motor. In this way, the advantage is that the deflection angle of the guide plate can be adjusted by the waterproof motor when necessary. The disadvantage is that the structure is more complicated and the stability is relatively poor.

[0067] In this embodiment, the guide plates 9 are fixedly mounted on the columns 8, and the angle between each guide plate 9 and the outflow direction of the tributary gradually increases from the far shore end to the near shore end.

[0068] In this way, the guide plate is fixedly installed, and the structure is simpler and more stable. At the same time, the angle between each guide plate and the water outflow direction of the tributary gradually increases from the far shore end to the near shore end. This is because the guide plate at the far shore end is located in the middle of the river and is subject to a greater impact of the water flow. Therefore, adjusting the angle to be smaller can better mitigate the impact. The guide plate at the near shore end is located at the edge of the river and is less impacted by the water flow. Therefore, the angle can be adjusted to increase, so that it drives the river water on one side of the upstream end of the tributary to flow out of the tributary and deviate more significantly toward the downstream end of the main stream. Then, relying on this part of the river water, the remaining middle part of the river water that is less guided can also be deviated at a larger angle toward the downstream end of the main stream. Therefore, on the premise of better ensuring the stability of the guide plate itself, the offset guiding effect of the tributary river water outflow is better guaranteed.

[0069] The guide plate 9 is made of elastic rubber material as a whole and a circle of metal frame 10 is embedded in the edge position.

[0070] In this way, when the guide plate is impacted by water flow, it can not only rely on its own elastic deformation to better maintain stability, but also the key is that the metal frame at the edge position is set so that the water-facing surface in the middle position will form an inward depression when impacted by water flow. This depression will change the direction of water flow out of the guide plate, and the greater the impact force of the water flow, the larger the depression, and the more the water flow out of the guide plate will deviate toward the downstream direction of the main stream. Therefore, it has the effect of adaptive adjustment according to the impact force of the water flow. The greater the impact force, the better the effect of diverting water toward the downstream direction of the main stream.

[0071] The fixed foundation includes a chassis 11 arranged at the lower end of each column, and a plurality of vertical bars 12 embedded in the riverbed are arranged downward from the lower end of each chassis, so that the fixation can be better achieved.

Claims

1. A method for maintaining navigation safety at the intersection of a canal main stream and tributary streams, characterized in that: The water from the canal tributaries is subjected to energy dissipation treatment before flowing into the main stream and is guided to change direction when flowing out of the tributaries, so that the water is deflected in the downstream direction and flows into the main stream of the canal.

2. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 1, characterized in that: The surface water of the tributary river channel is broken and wave-removed, the middle and upper layer water is subjected to impact energy dissipation treatment, and the lower layer water is guided to deflect the water toward the downstream of the main stream and flow into the main stream channel.

3. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 2, characterized in that: The method is implemented by relying on a main and tributary river diversion embankment system, which includes an embankment body arranged downward along the estuary direction at the upstream end of the tributary river estuary, a wave-breaking and wave-dissipating structure is arranged on the upper surface of the embankment body at the river surface, an impact energy dissipation structure is arranged at the middle and upper position of the embankment body, a diversion device is arranged at the lower position of the embankment body, and the lower end of the embankment body is fixed to the bottom of the riverbed by relying on a downward fixed foundation.

4. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 3, characterized in that: There is a gap between the far bank end of the embankment and the downstream end of the tributary river mouth.

5. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 3, characterized in that: The breaking and wave-breaking structure comprises a plurality of support frames with upward pointed ends, which are triangular in cross section and arranged at intervals along the length direction of the embankment body. The upper end and two corner positions of the support frames are respectively fixed on a support beam arranged along the length direction of the embankment body. One or more inner beams are also arranged in parallel and at intervals in the same direction inside the three support beams. The inner beams are fixed on the three support beams by means of connecting ribs along the cross-sectional direction. The support frame is provided with a plurality of openings which penetrate left and right.

6. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 3, characterized in that: The impact energy dissipation structure includes multiple layers of energy dissipation frames stacked up and down. The energy dissipation frames are rectangular frame structures with hollowed-out sides on the front and rear sides. Each layer of energy dissipation frames has multiple energy dissipation frames along the length direction of the embankment body. Energy dissipation baffles are vertically fixed inside the energy dissipation frames along the water-facing surface direction.

7. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 6, characterized in that: The energy dissipation baffle is a whole piece that matches the length of the energy dissipation frame and is arranged along the interior of the energy dissipation frame to form a front and rear partition.

8. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 6, characterized in that: There are three energy dissipation baffles, two of which are arranged in parallel at both ends of the inner cavity of the energy dissipation frame at the rear position along the length direction, and the other is arranged at the front side between the two rear energy dissipation baffles and its projection in the front-to-back direction can shield the space between the two rear energy dissipation baffles.

9. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 3, characterized in that: The diversion device includes a plurality of vertically arranged columns which are spaced apart at the lower part of the embankment along the length direction of the embankment, with spaces formed between the columns for river water to flow through. A downward fixed foundation is arranged at the lower end of the columns, and a vertical guide plate is installed on each column. The guide plate is arranged in a direction which is deflected at a certain angle as a whole toward the downstream of the main stream along the direction of outflow of the tributary.

10. The method for maintaining navigation safety at the intersection of canal main and tributary rivers as claimed in claim 9, characterized in that: The length of the guide plate is greater than the distance between adjacent columns, and has a tail portion extending obliquely out of the embankment body along the water flow direction; The end of the guide plate on the water-facing side is arc-shaped and the horizontal cross-section is shaped like a wing with a thick front and a thin rear; The guide plate is rotatably mounted on the column through a sleeve-type rotating shaft, and a sprocket is fixedly mounted on the upper end of each rotating shaft. A transmission chain is externally connected to each sprocket, and the transmission chain is connected to a waterproof motor; or the guide plate is fixedly mounted on the column, and the angle between each guide plate and the water outlet direction of the tributary gradually increases from the far shore end to the near shore end; The guide plate is made of elastic rubber material as a whole and a circle of metal frame is embedded in the edge position.

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