Multistage ship lock drainage and navigation multiplexing system and operation method thereof

Abstract

The invention discloses a multi-stage ship lock drainage and navigation multiplexing system and an operation method thereof. The system comprises a first-stage ship lock chamber section located on the upstream, a last-stage ship lock chamber section located on the downstream and a plurality of middle-stage ship lock chamber sections located between the first-stage ship lock chamber section and the last-stage ship lock chamber section. Each stage of ship lock chamber section is composed of a lock chamber bottom plate and ship lock walls arranged on the two sides of the lock chamber bottom plate. A water conveying gallery is arranged in the lock wall of the ship lock, and the middle of the water conveying gallery communicates with a branch gallery arranged in a lock chamber bottom plate through a T-shaped pipe. A plurality of water outlet holes are formed in the tops of the branch galleries; an energy dissipation pier group formed by a plurality of energy dissipation piers is arranged at the water outlet hole in the lock chamber bottom plate; and a flip bucket is arranged at the downstream end of each stage of lock chamber section of the ship lock. According to the multi-stage ship lock collaborative continuous energy dissipation scheme, the effects of improving the space utilization rate, saving the land area and reducing the construction cost are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy projects, in particular to a multi-stage ship lock discharge navigation reuse system and a running method thereof. BACKGROUND

[0002] The traditional ship lock is mainly composed of a lock chamber section, an upper lock head, a lower lock head and the like, and its core function is to realize the passage of ships between different water levels through the regulation of the water level in the lock chamber. The ship lock chamber is only used for ship passage, the water level between the lock chambers is adjusted through the water conveying corridor, and the discharge function relies on the independently arranged spillway or discharge lock. These discharge facilities are usually arranged separately from the ship lock. Each stage of the ship lock operates independently, and there is a lack of energy dissipation facility design and lack of coordination between stages.

[0003] In a water conservancy hub project, the ship lock, as a hydraulic structure for ensuring ship navigation, generally does not take into account the discharge function, and its conventional design is usually independent of the discharge facility to avoid risks such as severe water flow disturbance and structural overload caused by discharge. However, in actual engineering practice, the design and construction of a water conservancy hub project often faces the problem of insufficient land width. In this scenario, if the discharge facility and the ship lock structure are arranged separately, it is difficult to achieve in space, and a series of derivative problems will be caused: (1) Increased difficulty of resettlement: Separate arrangement of discharge facilities and lock chamber structures requires a wider land area, involving a larger range of land acquisition and relocation, significantly increasing the complexity and social cost of resettlement.

[0004] (2) Significant increase in project cost: Separate arrangement of discharge facilities and lock chamber structures requires the construction of two independent foundation structures, water retaining structures and operation and management systems, greatly increasing the amount of civil engineering, equipment investment and post-operation and maintenance costs, resulting in a significant increase in overall project cost.

[0005] (3) Complex hub layout: Forced separation in a narrow area can lead to scattered overall layout of the hub, complex water flow conditions, and even affect the safe operation of other structures.

[0006] Therefore, under the condition of limited design and construction land width, the scheme of separate arrangement of ship locks and discharge facilities does not meet the feasibility and economy of engineering implementation, and becomes a key bottleneck restricting the efficient and economic construction of water conservancy hubs under such limited terrain conditions. SUMMARY

[0007] The purpose of the present application is to overcome the deficiencies of the background art and provide a multi-stage ship lock discharge navigation reuse system and a running method thereof.

[0008] To achieve the above object, the application provides a multi-stage ship lock discharge and navigation reuse system, which comprises a first-stage ship lock chamber section at an upstream, a last-stage ship lock chamber section at a downstream and a plurality of intermediate-stage ship lock chamber sections between the first-stage ship lock chamber section and the last-stage ship lock chamber section; each stage of the ship lock chamber section is composed of a chamber bottom plate and ship lock walls arranged on both sides of the chamber bottom plate; The ship lock wall is internally provided with a water conveying gallery, and the middle part of the water conveying gallery is communicated with a branch gallery arranged in the chamber bottom plate through a T-shaped pipe; The top part of the branch gallery is provided with a plurality of water outlets; the chamber bottom plate is provided with an energy dissipation pier group composed of a plurality of energy dissipation piers at the water outlets; The downstream end of each stage of the ship lock chamber section is provided with a flip bucket, and the flip bucket is integrated with the upper lock head of the next stage of the ship lock chamber section.

[0009] As a preferred embodiment, the chamber bottom plate is arranged in a reduced depth to provide installation space for the energy dissipation piers; The energy dissipation pier is composed of at least one trapezoidal concrete column and two rectangular concrete piers.

[0010] As a preferred embodiment, the upstream of the energy dissipation pier is provided with an energy dissipation cover plate, the energy dissipation cover plate covers the water outlet, and the energy dissipation cover plate and the energy dissipation pier jointly form an integrated energy dissipation structure.

[0011] As a preferred embodiment, an intermediate lock head gate is arranged between the first-stage ship lock chamber section and the intermediate-stage ship lock chamber section, a downstream side lock head gate is arranged between the intermediate-stage ship lock chamber section and the last-stage ship lock chamber section, and an upstream side lock head gate is further arranged at the upstream end of the first-stage ship lock chamber section.

[0012] As a preferred embodiment, one water conveying gallery is arranged in each of the ship lock walls on both sides of each stage of the ship lock chamber section; The water conveying gallery is provided with working valves for operation adjustment and maintenance valves for maintenance closure, and is provided with a maintenance door groove and a plugging door groove at the corresponding positions.

[0013] As a preferred embodiment, the T-shaped pipe divides the water conveying gallery into left and right branch galleries, and a plurality of water outlets are arranged at the top of the corresponding branch galleries.

[0014] As a preferred embodiment, a plurality of water outlets are arranged along the length direction of the branch gallery to realize top water outlet and cooperate with the energy dissipation cover plate for energy dissipation.

[0015] As a preferred implementation manner, the water-facing surface of the deflector is a sloping surface structure; and the downstream end of the last-stage ship lock chamber section is provided with a bottom flow energy dissipation structure for dissipating the water flow of the last-stage discharge.

[0016] The application also provides a method for operating the multi-stage ship lock discharge and navigation reuse system, under normal navigation conditions, when the intermediate-stage ship lock chamber section is filled with water, the working valve of the water conveying gallery on the upstream side is opened, the working valve of the water conveying gallery on the downstream side is closed, the water in the upper-stage ship lock chamber section flows through the water conveying gallery, the T-shaped pipe and the branch gallery in sequence, and finally flows out from the top water outlet holes in the top of the branch gallery in a top water outlet mode, at this time, the water flow is dissipated under the action of the integrated energy dissipation structure formed by the energy dissipation cover plate and the energy dissipation pier group.

[0017] As a preferred implementation manner, in the method for operating the multi-stage ship lock discharge and navigation reuse system under the discharge condition, the intermediate-stage head gate, the downstream-side head gate and the upstream-side head gate are simultaneously opened, at this time, the water flow is discharged from the first-stage ship lock chamber section, overflows the energy dissipation cover plate through the deflector of the upper-stage ship lock chamber section, and directly flows into the next-stage ship lock chamber section, and directly dissipates energy by colliding with the energy dissipation pier group, and the water body after energy dissipation is discharged from the deflector of the ship lock chamber section again, and is shot to the last-stage ship lock chamber section, and the end of the last-stage ship lock chamber section adopts bottom flow energy dissipation.

[0018] Compared with the prior art, the application has the following advantages: Firstly, the application is designed for the background of insufficient land width for design and construction, and under the premise of ensuring the safety of the main structure of the ship lock and the basic navigation safety, the ship lock can safely and controllably bear part or all of the flood discharge function, thereby effectively avoiding the problems of resettlement and cost caused by the separation of the ship lock and the discharge facility under the background, and improving the overall feasibility and economy of the project.

[0019] Secondly, the application adopts the scheme of the combination of the chamber bottom plate, the energy dissipation pier group and the deflector, the “integrated” design of the energy dissipation pier and the energy dissipation cover plate, and the continuous energy dissipation of the multi-stage ship lock, solves the problems of separation of the discharge and navigation functions and insufficient discharge and energy dissipation capacity of the ship lock chamber in the water conservancy hub project, and achieves the effects of improving the space utilization rate, saving the land area and reducing the project cost.

[0020] Thirdly, while reducing the depth of the lock chamber floor, this invention employs a scheme of arranging energy dissipation piers. Without affecting the normal navigation of the lock, the energy dissipation piers achieve the dual effect of "water discharge and flow release" energy dissipation. Furthermore, because the flow release energy dissipation is achieved by using the end of the flow release sill, a large amount of energy can be lost during the energy dissipation between stages, which not only improves the energy dissipation effect but also avoids the direct impact of high-speed water flow on the gate system, reducing the damage to the gate structure caused by the flow release. This invention effectively avoids the problems of resettlement and cost caused by the separate arrangement of the lock and the flow release facilities, resulting in the reduction of construction land and lower project costs.

[0021] Fourth, this invention organically combines the spillway channel with the lock chamber system, giving the lock chamber controlled spillway capacity while ensuring navigation safety. This eliminates the need for large-scale layouts of independent spillways / sluice gates, addressing the pain points of "insufficient land width" and "infeasibility of separate layout" in the background technology. Through the cascaded path of "sluice gate - lock chamber - next-level sluice gate," the water flow continuously loses energy between each level, overcoming the defects of "independent operation of each level of lock and lack of coordinated energy dissipation between levels," and reducing the inflow velocity and turbulence intensity of the downstream level.

[0022] Fifth, the multi-stage lock spillway navigation reuse system of this invention adopts multi-functional integration, making the overall layout of the hub more centralized and orderly, reducing disturbance to surrounding banks, roads and existing structures, and minimizing constraints on the overall layout and flood passage. The diversion flow and inter-stage energy dissipation move the high-speed main flow away from the gates and piers, reducing the instantaneous hydraulic impact and vibration response of the gate leaves, gate slots and lock head area, and improving the structural service safety margin.

[0023] Sixth, the reduced depth of the lock chamber floor in this invention provides vertical space for the energy dissipation pier group, while maintaining the clearance and water depth required for navigation. The energy dissipation piers, composed of trapezoidal concrete columns and two rectangular concrete piers, form a multi-scale backflow and vortex structure, effectively reducing jet kinetic energy and lowering near-bottom shear. During navigation filling and drainage, they work in conjunction with the top water outlet to provide gentle energy dissipation; under discharge conditions, they withstand and dissipate high-energy jets, achieving a single component that accommodates both types of conditions, simplifying the construction and maintenance system.

[0024] Seventh, the energy dissipation cover plate of this invention covers the outlet hole, suppressing strong local scouring and jet lift, making the changes in water level and flow velocity in the lock chamber more gradual, reducing the peak stress and sway of the mooring cables, and improving navigation comfort and safety. The energy dissipation cover plate and energy dissipation pier form a combined resistance body, expanding the effective energy dissipation zone and shortening the necessary energy dissipation length, thereby reducing the size of the structure and the amount of materials used.

[0025] Eighth, the T-shaped pipe of this invention evenly distributes the flow of the long corridor to the branch corridors on both sides, and the multi-point top water outlet reduces the flow velocity in a single hole and the local energy concentration, thus improving the water level time history curve in the lock chamber. Without significantly increasing the local unfavorable hydraulics, it improves the effective cross-section and distribution efficiency, and achieves more economical filling and drainage time control in navigation mode. Attached Figure Description

[0026] Figure 1 This is a top view of a three-stage ship lock according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the energy dissipation pier. Figure 3 This is a schematic diagram of the gate chamber structure; Figure 4 Schematic diagram of the flow-lifting sill layout; In the diagram, the following structures are included: intermediate lock head gate 1001, branch corridor 1002, T-shaped pipe 1003, downstream lock head gate 1004, first-stage lock chamber section 1005, energy dissipation cover plate 1006, energy dissipation pier 1007, water conveyance corridor 1008, flow ramp 1009, last-stage lock chamber section 1010, trapezoidal concrete column 1011, concrete rectangular pier 1012, water outlet 1013, lock wall 1014, lock chamber bottom plate 1015, sealing gate slot 1016, maintenance gate slot 1017, maintenance valve 1018, and working valve 1019. Detailed Implementation

[0027] The following examples illustrate the implementation of the present invention in detail, but they do not constitute a limitation on the invention and are merely illustrative. Furthermore, the advantages of the present invention will become clearer and easier to understand by explaining them.

[0028] This invention proposes a multi-stage lock discharge and navigation reuse system, comprising an upstream first-stage lock chamber section 1005, a downstream final-stage lock chamber section 1010, and several intermediate-stage lock chamber sections between the first-stage and final-stage lock chamber sections 1005 and 1010. Each lock chamber section consists of a lock chamber floor 1015 and lock walls 1014 arranged on both sides of the lock chamber floor 1015. A long water conveyance corridor 1008 is provided within the lock walls 1014, with a water conveyance length of... The middle section of the corridor 1008 is connected to the branch corridor 1002 arranged in the bottom plate 1015 of the lock chamber via a T-shaped pipe 1003; the top of the branch corridor 1002 is provided with several water outlet holes 1013; a group of energy dissipation piers 1007 are arranged on the bottom plate 1015 of the lock chamber at the water outlet holes 1013 to reduce the energy of the outflow; a flow-dissipating sill 1009 is provided at the downstream end of each lock chamber section, and the flow-dissipating sill 1009 is connected to the upper lock head of the next lock chamber section.

[0029] See Figure 1The multi-stage lock spillway navigation reuse system of this invention is mainly a reinforced concrete integral structure lock, consisting of a lock chamber floor slab 1015 and two lock walls 1014 on both sides. A water conveyance corridor 1008 is arranged inside the lock walls, with a T-shaped pipe 1003 connected in the middle of the corridor. Branch corridors 1002 are arranged on the lock chamber floor slab, with several outlet holes 1013 arranged on them. Energy dissipation piers 1007 consist of trapezoidal concrete columns 1011 and two rectangular concrete piers 1012, arranged on the outlet holes of the lock chamber floor slab. A flow-deflecting sill 1009 has a sloped upstream surface, is arranged on the floor slab at the end of the lock chamber, and is integrated with the upper gate of the next-stage lock chamber.

[0030] Specifically, the gate chamber floor slab is designed with a reduced depth to provide installation space for the energy dissipation pier 1007; that is, the elevation of the gate chamber floor slab is appropriately lowered to create sufficient vertical space for installing a taller energy dissipation pier structure. Figure 2 As shown, the energy dissipation pier 1007 is composed of at least one trapezoidal concrete column 1011 and two concrete rectangular piers 1012, with the two concrete rectangular piers 1012 located on both sides of the bottom of the trapezoidal concrete column 1011.

[0031] In one embodiment, an energy dissipation cover plate 1006 is provided upstream of the energy dissipation pier 1007. The energy dissipation cover plate 1006 covers the water outlet 1013 and together with the energy dissipation pier 1007, forms an integrated energy dissipation structure. The energy dissipation cover plate 1006 covers the water outlet 1013 and can block and back pressure the high-speed water flow ejected through the water outlet, causing the water flow to form a backflow vortex zone below the energy dissipation cover plate. The energy of the water flow is consumed through vortex and collision, thereby further reducing the kinetic energy of the water flow entering the gate chamber.

[0032] In one embodiment, an intermediate lock head gate 1001 is provided between the first-stage lock chamber section 1005 and the intermediate-stage lock chamber section, and a downstream lock head gate 1004 is provided between the intermediate-stage lock chamber section and the final-stage lock chamber section 1010. An upstream lock head gate is also provided at the upstream end of the first-stage lock chamber section 1005. The intermediate lock head gate 1001 and the downstream lock head gate 1004 are used to separate adjacent lock chamber sections, and the upstream lock head gate is used to close the upstream inlet of the entire lock system.

[0033] In one implementation, such as Figure 3 As shown, at least one long water conveyance corridor 1008 is arranged in each lock wall 1014 on both sides of each lock chamber section. This symmetrical arrangement of water conveyance corridors on both sides can make the water flow distribution more uniform when the lock chamber is filled and drained, thereby reducing the impact on ships inside the lock chamber.

[0034] Specifically, the water conveyance corridor 1008 is equipped with a working valve 1019 for operation regulation and a maintenance valve 1018 for maintenance closure, with maintenance gate slots 1017 and sealing gate slots 1016 located accordingly. The working valve 1019 is used to regulate the flow rate during the filling or emptying of the lock, while the maintenance valve 1018 is used to close the corridor water flow when the lock is shut down for maintenance. The maintenance gate slots 1017 and 1016 are used to insert temporary sealing gate plates to block the water flow when the valves or water conveyance system are being maintained.

[0035] In one embodiment, the T-shaped pipe 1003 divides the water conveyance corridor 1008 into two branch corridors 1002, with several outlet holes 1013 arranged on the top of the corresponding branch corridors 1002. Through the diversion by the T-shaped pipe, the water flow from the water conveyance corridor 1008 is evenly distributed to the left and right branch corridors 1002 below the gate chamber floor, helping to avoid uneven flow caused by concentrated water flow entering the gate chamber from one side.

[0036] In one embodiment, a plurality of outlet holes 1013 are arranged at intervals along the length of the branch corridor 1002 to achieve top water discharge and, in conjunction with the energy dissipation cover plate 1006, dissipate energy. The spacing and number of these outlet holes 1013 can be optimized according to the length of the gate chamber and the water filling requirements, so that the water flow entering the gate chamber is evenly distributed along the length. The top discharge form, combined with the energy dissipation cover plate 1006 above, can effectively reduce the kinetic energy of the outflow and reduce the degree of turbulence in the water flow within the gate chamber.

[0037] Specifically, such as Figure 4 As shown, the upstream face of the spillway sill 1009 is an inclined slope structure; a bottom flow energy dissipation structure is installed at the downstream end of the final lock chamber section 1010 to dissipate energy from the final discharge flow. The inclined slope of the spillway sill 1009 can redirect the high-speed downstream flow upwards and throw it onto the water surface, allowing some of the energy to dissipate as the water travels through the air. The bottom flow energy dissipation structures, such as stilling basins and aprons, at the end of the final lock chamber section 1010 are used to further reduce the remaining energy of the flow and gently guide the flow into the downstream channel, preventing erosion damage to the downstream riverbed and banks.

[0038] The operation method of the multi-stage lock drainage and navigation reuse system of the present invention, under normal navigation conditions, when the lock chamber section of the intermediate lock is filled with water, opens the working valve 1019 of the upstream water conveyance corridor 1008 and closes the working valve 1019 of the downstream water conveyance corridor 1008. This allows water from the lock chamber section of the previous stage to flow sequentially through the water conveyance corridor 1008, the T-pipe 1003, and the branch corridor 1002, finally exiting from several outlet holes 1013 at the top of the branch corridor in a top-outlet configuration. At this time, the water flow is dissipated by the integrated energy dissipation structure formed by the energy dissipation cover plate and the energy dissipation pier. The water flowing out of the outlet holes 1013 is covered by the upper energy dissipation cover plate 1006, and its velocity and energy are effectively attenuated under the energy dissipation structure composed of the energy dissipation cover plate and the energy dissipation pier 1007. When the lock chamber is no longer in use and water needs to be released, the working valve 1019 of the upstream water conveyance corridor 1008 is closed and the working valve 1019 of the downstream water conveyance corridor 1008 is opened, so that the water in the lock chamber section is discharged from the outlet hole 1013 through the downstream branch corridor 1002 into the next level lock chamber section or downstream water body, thereby lowering the lock chamber water level.

[0039] Under the discharge condition, the intermediate gate 1001, the downstream gate 1004, and the upstream gate are opened simultaneously. At this time, the water flows from the first-stage lock chamber section 1005 through the upper-level sill, over the energy dissipation cover section 1006, and directly into the next-stage lock chamber section. Through collision with the energy dissipation pier group, direct energy dissipation is achieved. The energy-dissipated water is then ejected again from the sill 1009 of this lock chamber section and directed towards the last-stage lock chamber section 1010. Bottom flow energy dissipation is used at the end of the last-stage lock chamber section to smoothly introduce the water flow downstream.

[0040] This invention focuses on the design of a discharge and navigation reuse system for multi-level ship locks. The specific implementation scheme remains consistent for locks of different numbers of levels. Taking a three-level ship lock as an example, it includes a first-level lock chamber section, a second-level lock chamber section, and a third-level lock chamber section. The specific implementation scheme is as follows: Under normal navigation conditions, when the lock chamber of the second-stage lock is filled with water, the upstream water conveyance corridor gates open and the downstream water conveyance corridor gates close. The water from the upper lock chamber flows sequentially through the long water conveyance corridor 1008, the T-shaped pipe 1003, and the branch corridor 1002, finally flowing out from several outlet holes 1013 at the top of the branch corridor in a top-outflow manner. At this time, the water flow dissipates energy under the action of the integrated energy dissipation structure formed by the energy dissipation cover plate and the energy dissipation pier. Other lock stages are arranged in a similar manner.

[0041] Under spillway conditions, all gates open simultaneously. Water flows from the first-stage lock chamber section 1005 (i.e., the first-stage lock chamber section), through the next-stage sill, over the energy dissipation cover section 1006, and directly into the next-stage lock chamber (i.e., the second-stage lock chamber section). Through collision with the energy dissipation piers 1007, direct energy dissipation is achieved. The dissipated water is then ejected again from the tail sill 1009 and directed towards the final lock chamber section 1010 (i.e., the third-stage lock chamber section). Other lock stages are arranged similarly, with bottom flow energy dissipation used at the end of the final lock chamber section.

[0042] This invention, while reducing the depth of the lock chamber floor, employs a scheme of arranging energy dissipation piers. Without affecting the normal navigation of the lock, it achieves the dual effect of energy dissipation piers for both "water discharge" and "flow release". Furthermore, because it uses the flow release energy dissipation at the end of the flow release sill, the water flow can lose a large amount of energy during inter-stage energy dissipation, which not only improves the energy dissipation effect but also avoids the direct impact of high-speed water flow on the gate system, reducing the damage of the flow release to the gate structure. This invention effectively avoids the problems of resettlement and cost caused by the separate arrangement of the lock and the flow release facilities, resulting in the reduction of construction land and lower project costs.

[0043] The above are merely specific embodiments of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention. All other details not described in detail belong to the prior art.

Claims

1. A multi-stage lock discharge and navigation reuse system, characterized in that: It includes the upstream first-stage lock chamber section (1005), the downstream last-stage lock chamber section (1010), and several intermediate-stage lock chamber sections between the first-stage lock chamber section (1005) and the last-stage lock chamber section (1010); each lock chamber section consists of a lock chamber floor plate (1015) and lock walls (1014) arranged on both sides of the lock chamber floor plate (1015); The lock wall (1014) is provided with a water conveyance corridor (1008), and the middle part of the water conveyance corridor (1008) is connected to the branch corridor (1002) arranged in the bottom plate (1015) of the lock chamber through a T-shaped pipe (1003); The top of the branch corridor (1002) is provided with several water outlet holes (1013); the bottom plate of the gate chamber (1015) is provided with a group of energy dissipation piers (1007) arranged at the water outlet holes (1013). Each lock chamber section has a flow-lifting sill (1009) at its downstream end, and the flow-lifting sill (1009) is integrated with the upper lock head of the next lock chamber section.

2. The system according to claim 1, characterized in that: The gate chamber bottom plate (1015) is arranged with a reduced depth to provide installation space for the energy dissipation pier (1007); The energy dissipation pier (1007) is composed of at least one trapezoidal concrete column (1011) and two concrete rectangular piers (1012).

3. The system according to claim 2, characterized in that: An energy dissipation cover plate (1006) is provided upstream of the energy dissipation pier (1007). The energy dissipation cover plate (1006) covers the water outlet (1013) and together with the energy dissipation pier (1007), they form an integrated energy dissipation structure.

4. The system according to claim 3, characterized in that: An intermediate gate (1001) is provided between the first-stage lock chamber section (1005) and the intermediate-stage lock chamber section. A downstream gate (1004) is provided between the intermediate-stage lock chamber section and the final-stage lock chamber section (1010). An upstream gate is also provided at the upstream end of the first-stage lock chamber section (1005).

5. The system according to claim 4, characterized in that: At least one water conveyance corridor (1008) is arranged in the lock walls (1014) on both sides of each lock chamber section. The water conveyance corridor (1008) is equipped with a working valve (1019) for operation and regulation and a maintenance valve (1018) for maintenance and closure, and maintenance door slots (1017) and sealing door slots (1016) are provided in the corresponding positions.

6. The system according to claim 5, characterized in that: The T-shaped pipe (1003) divides the water conveyance corridor (1008) into two branch corridors (1002) on the left and right, and a number of water outlets (1013) are respectively arranged on the top of the corresponding branch corridors (1002).

7. The system according to claim 6, characterized in that: Several of the water outlet holes (1013) are arranged at intervals along the length of the branch corridor (1002) to achieve top water outlet and to dissipate energy in conjunction with the energy dissipation cover plate (1006).

8. The system according to any one of claims 1 to 7, characterized in that: The upstream surface of the spillway (1009) is an inclined slope structure; the downstream end of the final lock chamber section (1010) is provided with a bottom flow energy dissipation structure to dissipate the energy of the final discharge flow.

9. A method for operating a multi-stage lock discharge and navigation reuse system as described in any one of claims 1 to 8, characterized in that: Under normal navigation conditions, when the lock chamber section of the intermediate lock is filled with water, the working valve (1019) of the upstream water conveyance corridor (1008) is opened and the working valve (1019) of the downstream water conveyance corridor (1008) is closed, so that the water of the lock chamber section of the next level lock passes through the water conveyance corridor (1008), T-shaped pipe (1003) and branch corridor (1002) in sequence, and finally flows out from several water outlets (1013) at the top of the branch corridor in the form of top water outlet. At this time, the water flow dissipates energy under the action of the integrated energy dissipation structure formed by the energy dissipation cover plate and the energy dissipation pier.

10. The operating method according to claim 9, characterized in that: Under the discharge condition, the intermediate gate (1001), the downstream gate (1004), and the upstream gate are opened simultaneously. At this time, the water flows from the first lock chamber section (1005) through the upper-level sill, over the energy dissipation cover (1006), and directly into the next lock chamber section. Through collision with the energy dissipation piers, direct energy dissipation is achieved. The dissipated water is then ejected again from the sill (1009) of the lock chamber section and directed towards the last lock chamber section (1010). Bottom flow energy dissipation is adopted at the end of the last lock chamber section.

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