Double-ship-lock salty-preventing and salty-discharging method based on salty-collecting pit
By using the dual lock structure in the ship lock and the coordinated coordination between Jixian Pit and Jixian Pit, the opening sequence and time of the lock are adjusted, and the existing salt-proof measures for Jixian Pit are poorly anti-salt, achieving a more efficient salt-proof effect of salt-water discharge.
Patent Information
- Application Number
- CN202411863148.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-07
AI Technical Summary
The existing ship lock salt-gathering pit anti-salination measures have problems such as poor salt-prevention effect, high engineering construction costs, and accumulating salinity areas resulting in reduced salt-prevention effect.
The double locks are used to prevent salt and remove salt from salt based on salt-shaving pit. By adjusting the opening sequence and time of the two locks, the double locks cooperate with each other when they are activated, and the salt water traced upwards in the lock chamber is sent into the lock chamber to the greatest extent and discharged into the seawater.
It significantly improves the salt water traceability problem caused by the use of the lock, improves the anti-saltitude effect, has high navigation efficiency, simple operation, and is suitable for large-scale applications.
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of seawater intrusion prevention and control, in particular to a saltwater prevention and drainage method using a double ship lock based on a saltwater prevention and drainage pit. Background Art
[0002] my country has a long coastline and is a country with many estuaries. There are different degrees of seawater intrusion in the Huangpu River, Yangtze River, Pearl River, Yellow River, Haihe River, Qiantang River, etc. In order to prevent the salinization of seawater into the river and pollute freshwater, ship locks are set up at the mouths of some navigable rivers, so as to use the anti-salinity measures of the ship locks to block the intrusion of seawater into freshwater rivers, so as to achieve the purpose of protecting freshwater resources and ecological environment. When the end of the ship lock is located in the tidal zone, it is affected by factors such as seawater tides, resulting in many differences from the ship locks in inland waterways.
[0003] In order to solve the problem of seawater intrusion in estuary ship locks, the anti-salinity measures for ship lock projects mainly include air curtain method, salt water collection pit method, replacement method and liftable salt water box method. Among them, the salt water collection pit is the most widely used and mature anti-salinity measure for ship locks. The existing ship lock salt water collection pit mainly relies on increasing the area and depth of the salt water collection pit to accumulate salt water in the salt water collection pit by utilizing the density flow movement characteristics of salt water. However, most of the salt water collection pit anti-salinity measures adopted in existing ship lock projects have the problems of huge volume and high engineering construction cost; moreover, the over-large salt water collection pit is easy to form a salinity accumulation area during operation, which leads to the formation of stable stratification of salt water in the salt water collection pit, which significantly reduces the anti-salinity effect of the salt water collection pit; at the same time, in the existing salt water collection pit for anti-salinity treatment, only the inherent structure and function of the salt water collection pit are used to achieve anti-salinity, without considering the use of the coordinated effect of ship lock operation and the salt water collection pit to achieve a better anti-salinity effect. Summary of the invention
[0004] The purpose of the present invention is to address the defect that the existing salt-prevention measures for salt-prevention pits have poor salt-prevention effects, and to propose a double-ship lock salt-prevention and salt-discharge method based on the salt-prevention pit.
[0005] In order to achieve the above-mentioned purpose of the invention, the present invention provides a method for preventing and discharging salt water from a double ship lock based on a salt water collecting pit, comprising the following steps:
[0006] S1. Open the miter gate of the first ship lock, and the salt water in the first lock chamber flows upstream into the salt collection pit of the upstream pilot channel; at the same time, the water in the salt collection pit of the upstream pilot channel is poured into the second lock chamber through the second water transfer corridor until the water level in the second lock chamber is the same as that in the upstream pilot channel;
[0007] S2, close the miter gate of the first ship lock, and discharge the water in the first lock chamber into the downstream navigation channel through the first salt discharge channel; at the same time, open the miter gate of the second ship lock, and the salt water in the second lock chamber flows upstream into the salt collection pit of the upstream navigation channel;
[0008] S3. Close the miter gate at the upper gate of the second ship lock, and discharge the water in the second lock chamber into the downstream navigation channel through the second salt discharge channel; at the same time, fill the water in the salt collection pit of the upstream navigation channel into the first lock chamber through the first water transfer corridor until the water level in the first lock chamber is the same as that in the upstream navigation channel.
[0009] The present invention discloses a method for preventing and discharging salt water with double locks based on a salt-collecting pit. Based on the coordination of the double lock structure, the salt-collecting pit, the water conveyance corridor and the salt-discharging channel, the opening sequence and time of the two locks are adjusted in a targeted manner so that the two locks can cooperate with each other when activated, thereby being able to deliver the salt water flowing upstream in the lock chamber to the lock chamber to the greatest extent and discharge it into the seawater, significantly improving the problem of salt water flowing upstream caused by the use of the locks, and having a positive effect on the prevention and control of seawater intrusion. The method has high navigation efficiency, simple operation and is suitable for large-scale application.
[0010] Wherein, in step S1, preferably, the collection pit is arranged in the upstream pilot channel, and the length of the collection pit is 65%-75% of the length of the upstream pilot channel.
[0011] Preferably, the collection pit is a multi-stage collection pit.
[0012] Preferably, the depth of the collection pit gradually increases as it approaches the gate; the collection pit close to the gate is the deepest collection pit.
[0013] Preferably, the collection pit includes a primary collection pit and a secondary collection pit, and the height from the bottom of the primary collection pit to the bottom of the upstream navigation channel is 0.5-0.7 times the height from the bottom of the secondary collection pit to the bottom of the upstream navigation channel.
[0014] Preferably, the interface between the first-level salt collection pit and the second-level salt collection pit is set as an inclined surface; the inclination angle of the inclined surface is 120-150°; the preferred inclination angle has a better blocking effect on the upstream brine head and can better reduce the upstream speed of the brine.
[0015] Preferably, the amount of water contained in the salt collecting pit is not less than the amount of water poured into the gate chamber.
[0016] Preferably, the second water conveyance corridor is used to convey the brine in the salt collecting pit to the second lock chamber; one end of the second water conveyance corridor is arranged at the bottom of the salt collecting pit, and the other end is arranged at the bottom of the second lock chamber near the upper gate position.
[0017] Wherein, in step S2, preferably, the first salty water discharge channel is used to discharge the salty water in the first lock chamber into the downstream navigation channel, and the first salty water discharge channel is arranged at the tail of the first lock chamber.
[0018] Wherein, in step S3, preferably, the second salty drainage channel is used to discharge the brine in the second lock chamber into the downstream navigation channel; the second salty drainage channel is arranged at the tail of the second lock chamber.
[0019] Preferably, one end of the first water transfer corridor is arranged at the bottom of the collection pit, and the other end is arranged at the bottom of the first lock chamber near the upper gate position.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] 1. The salt-prevention and salt-draining method of the present invention is based on the coordination of the double ship lock structure, salt-collecting pit, water delivery corridor and salt-draining channel, and specifically adjusts the opening sequence and time of the two ship locks so that the two ship locks can cooperate with each other when they are activated, thereby being able to send the salt water flowing upstream in the lock chamber into the lock chamber to the greatest extent and discharge it into the seawater, significantly improving the problem of salt water flowing upstream caused by the use of the ship lock, and playing a positive role in the prevention and control of seawater intrusion.
[0022] 2. The method for preventing and discharging salt water of the present invention has high navigation efficiency, simple operation and is suitable for large-scale application. DETAILED DESCRIPTION
[0023] The present invention is further described in detail below in conjunction with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0024] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation of the present invention.
[0025] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.
[0026] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.
[0027] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.
[0028] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.
[0029] Embodiment 1:
[0030] A method for preventing and discharging salt water using a double ship lock based on a salt water collecting pit comprises the following steps:
[0031] S1. Open the miter gate of the first ship lock, and the salt water in the first lock chamber flows upstream into the salt collection pit of the upstream pilot channel; at the same time, the water in the salt collection pit of the upstream pilot channel is poured into the second lock chamber through the second water transfer corridor until the water level in the second lock chamber is the same as that in the upstream pilot channel;
[0032] The collection pit is arranged in the upstream pilot channel, and the length of the collection pit is 70% of the length of the upstream pilot channel.
[0033] The saltwater collection pit includes a first-level saltwater collection pit and a second-level saltwater collection pit, and the height between the bottom of the first-level saltwater collection pit and the bottom of the upstream navigation channel is 0.6 times the height between the bottom of the second-level saltwater collection pit and the bottom of the upstream navigation channel; the second-level saltwater collection pit is arranged at one end of the pit close to the gate, and the first-level saltwater collection pit is arranged at the end far from the gate; the water volume contained in the saltwater collection pit is not less than the water volume poured into the lock chamber; the second water conveyance corridor is used to transport the saltwater in the saltwater collection pit to the second lock chamber; one end of the second water conveyance corridor is arranged at the bottom of the saltwater collection pit, and the other end is arranged at the bottom of the second lock chamber close to the upper gate; the interface between the first-level saltwater collection pit and the second-level saltwater collection pit is arranged as an inclined surface; the inclination angle of the inclined surface is 135°;
[0034] S2, close the miter gate of the first ship lock, and discharge the water in the first lock chamber into the downstream navigation channel through the first salt discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, open the miter gate of the second ship lock, and the salt water in the second lock chamber flows upstream into the salt collection pit of the upstream navigation channel;
[0035] The first salty discharge channel is used to discharge the salt water in the first lock chamber into the downstream navigation channel, and the first salty discharge channel is arranged at the tail of the first lock chamber;
[0036] S3, close the miter gate at the upper gate of the second ship lock, and discharge the water in the second lock chamber into the downstream navigation channel through the second salt water discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, fill the water in the salt water collection pit of the upstream navigation channel into the first lock chamber through the first water transfer corridor until the water level of the first lock chamber is the same as that of the upstream navigation channel;
[0037] The second salty discharge channel is used to discharge the salt water in the second lock chamber into the downstream navigation channel; the second salty discharge channel is arranged at the tail of the second lock chamber;
[0038] One end of the first water transfer corridor is arranged at the bottom of the collection pit, and the other end is arranged at the bottom of the first lock chamber near the upper gate.
[0039] Example 2
[0040] A method for preventing and discharging salt water using a double ship lock based on a salt water collecting pit comprises the following steps:
[0041] S1. Open the miter gate of the first ship lock, and the salt water in the first lock chamber flows upstream into the salt collection pit of the upstream pilot channel; at the same time, the water in the salt collection pit of the upstream pilot channel is poured into the second lock chamber through the second water transfer corridor until the water level in the second lock chamber is the same as that in the upstream pilot channel;
[0042] The collection pit is arranged in the upstream navigation channel, and the length of the collection pit is 75% of the length of the upstream navigation channel.
[0043] The saltwater collection pit includes a first-level saltwater collection pit and a second-level saltwater collection pit, and the height between the bottom of the first-level saltwater collection pit and the bottom of the upstream navigation channel is 0.5 times the height between the bottom of the second-level saltwater collection pit and the bottom of the upstream navigation channel; the second-level saltwater collection pit is arranged at one end of the pit close to the gate, and the first-level saltwater collection pit is arranged at the end far from the gate; the water volume contained in the saltwater collection pit is not less than the water volume poured into the lock chamber; the second water conveyance corridor is used to transport the saltwater in the saltwater collection pit to the second lock chamber; one end of the second water conveyance corridor is arranged at the bottom of the saltwater collection pit, and the other end is arranged at the bottom of the second lock chamber close to the upper gate; the interface between the first-level saltwater collection pit and the second-level saltwater collection pit is arranged as an inclined surface; the inclination angle of the inclined surface is 150°;
[0044] S2, close the miter gate of the first ship lock, and discharge the water in the first lock chamber into the downstream navigation channel through the first salt discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, open the miter gate of the second ship lock, and the salt water in the second lock chamber flows upstream into the salt collection pit of the upstream navigation channel;
[0045] The first salty discharge channel is used to discharge the salt water in the first lock chamber into the downstream navigation channel, and the first salty discharge channel is arranged at the tail of the first lock chamber;
[0046] S3, close the miter gate at the upper gate of the second ship lock, and discharge the water in the second lock chamber into the downstream navigation channel through the second salt water discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, fill the water in the salt water collection pit of the upstream navigation channel into the first lock chamber through the first water transfer corridor until the water level of the first lock chamber is the same as that of the upstream navigation channel;
[0047] The second salty discharge channel is used to discharge the salt water in the second lock chamber into the downstream navigation channel; the second salty discharge channel is arranged at the tail of the second lock chamber;
[0048] One end of the first water transfer corridor is arranged at the bottom of the collection pit, and the other end is arranged at the bottom of the first lock chamber near the upper gate.
[0049] Example 3
[0050] A method for preventing and discharging salt water using a double ship lock based on a salt water collecting pit comprises the following steps:
[0051] S1. Open the miter gate of the first ship lock, and the salt water in the first lock chamber flows upstream into the salt collection pit of the upstream pilot channel; at the same time, the water in the salt collection pit of the upstream pilot channel is poured into the second lock chamber through the second water transfer corridor until the water level in the second lock chamber is the same as that in the upstream pilot channel;
[0052] The collection pit is arranged in the upstream navigation channel, and the length of the collection pit is 65% of the length of the upstream navigation channel.
[0053] The saltwater collection pit includes a first-level saltwater collection pit and a second-level saltwater collection pit, and the height between the bottom of the first-level saltwater collection pit and the bottom of the upstream navigation channel is 0.7 times the height between the bottom of the second-level saltwater collection pit and the bottom of the upstream navigation channel; the second-level saltwater collection pit is arranged at one end of the pit close to the gate, and the first-level saltwater collection pit is arranged at the end far from the gate; the volume of water contained in the saltwater collection pit is not less than the volume of water poured into the lock chamber; the second water conveyance corridor is used to transport the saltwater in the saltwater collection pit to the second lock chamber; one end of the second water conveyance corridor is arranged at the bottom of the saltwater collection pit, and the other end is arranged at the bottom of the second lock chamber close to the upper gate; the interface between the first-level saltwater collection pit and the second-level saltwater collection pit is arranged as an inclined surface; the inclination angle of the inclined surface is 120°;
[0054] S2, close the miter gate of the first ship lock, and discharge the water in the first lock chamber into the downstream navigation channel through the first salt discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, open the miter gate of the second ship lock, and the salt water in the second lock chamber flows upstream into the salt collection pit of the upstream navigation channel;
[0055] The first salty discharge channel is used to discharge the salt water in the first lock chamber into the downstream navigation channel, and the first salty discharge channel is arranged at the tail of the first lock chamber;
[0056] S3, close the miter gate at the upper gate of the second ship lock, and discharge the water in the second lock chamber into the downstream navigation channel through the second salt water discharge channel until the water level is the same as that of the downstream navigation channel; at the same time, fill the water in the salt water collection pit of the upstream navigation channel into the first lock chamber through the first water transfer corridor until the water level of the first lock chamber is the same as that of the upstream navigation channel;
[0057] The second salty discharge channel is used to discharge the salt water in the second lock chamber into the downstream navigation channel; the second salty discharge channel is arranged at the tail of the second lock chamber;
[0058] One end of the first water transfer corridor is arranged at the bottom of the collection pit, and the other end is arranged at the bottom of the first lock chamber near the upper gate.
[0059] A three-dimensional numerical simulation experiment was carried out on the double-ship lock method for preventing and draining salty water based on the salt collection pit in Examples 1-3. After 30 simulated locks, the salt water concentration at the inlet of the upstream navigation channel was no higher than 0.1‰. It can be seen that the double-ship lock method for preventing and draining salty water based on the salt collection pit of the present invention has a significant effect in preventing and draining salty water.
Claims
1. A method for preventing and discharging salt water using double ship locks based on a salt water collection pit, characterized in that: The following steps are involved: S1. Open the miter gate of the first ship lock, and the salt water in the first lock chamber flows upstream into the salt collection pit of the upstream pilot channel; at the same time, the water in the salt collection pit of the upstream pilot channel is poured into the second lock chamber through the second water transfer corridor until the water level in the second lock chamber is the same as that in the upstream pilot channel; S2, close the miter gate of the first ship lock, and discharge the water in the first lock chamber into the downstream navigation channel through the first salt discharge channel; at the same time, open the miter gate of the second ship lock, and the salt water in the second lock chamber flows upstream into the salt collection pit of the upstream navigation channel; S3. Close the miter gate at the upper gate of the second ship lock, and discharge the water in the second lock chamber into the downstream navigation channel through the second salt discharge channel; at the same time, fill the water in the salt collection pit of the upstream navigation channel into the first lock chamber through the first water transfer corridor until the water level in the first lock chamber is the same as that in the upstream navigation channel.
2. The method for preventing and discharging salty water from double ship locks according to claim 1, characterized in that: In step S1, the collecting pit is arranged in the upstream pilot channel, and the length of the collecting pit is 65%-75% of the length of the upstream pilot channel.
3. The method for preventing and discharging salty water from double ship locks according to claim 2, characterized in that: The described collection pit is a multi-level collection pit.
4. The method for preventing and discharging salty water from double ship locks according to claim 3, characterized in that: The depth of the collection pit gradually increases as it approaches the gate; the collection pit close to the gate is the deepest collection pit.
5. The method for preventing and discharging salty water from double ship locks according to claim 4, characterized in that: The collection pit includes a first-level collection pit and a second-level collection pit, and the height from the bottom of the first-level collection pit to the bottom of the upstream navigation channel is 0.5-0.7 times the height from the bottom of the second-level collection pit to the bottom of the upstream navigation channel.
6. The method for preventing and discharging salty water from double ship locks according to claim 5, characterized in that: The interface between the first-level collection pit and the second-level collection pit is set as an inclined surface; the inclination angle of the inclined surface is 120-150 degrees.
7. The design method of the ship lock anti-salty air curtain structure according to claim 1 is characterized in that: In step S1, the second water transfer corridor is used to transport the brine in the salt collection pit to the second lock chamber; one end of the second water transfer corridor is arranged at the bottom of the salt collection pit, and the other end is arranged at the bottom of the second lock chamber near the upper gate position.
8. The method for preventing and discharging salty water from double ship locks according to claim 1, characterized in that: In step S2, the first salty water discharge channel is used to discharge the salty water in the first lock chamber into the downstream navigation channel, and the first salty water discharge channel is arranged at the tail of the first lock chamber.
9. The method for preventing and discharging salty water from double ship locks according to claim 1, characterized in that: In step S3, the second salty drainage channel is used to discharge the brine in the second lock chamber into the downstream navigation channel; the second salty drainage channel is arranged at the tail of the second lock chamber.
10. The method for preventing and discharging salty water from double ship locks according to claim 1, characterized in that: In step S3, one end of the first water transfer corridor is arranged at the bottom of the collection pit, and the other end is arranged at the bottom of the first lock chamber near the upper gate position.