Variable-span multi-section combined type tide gate system and construction method

Abstract

The invention relates to the field of water conservancy projects, and discloses a variable-span multi-section combined type tide gate system and a construction method thereof. The system comprises a concrete main body structure arranged at the river mouth, the concrete main body structure extends in the width direction of the river mouth, a plurality of containing grooves are formed in the main body structure at intervals, and a gate unit capable of ascending and descending independently is arranged in each containing groove and used for forming a tide blocking structure in the ascending state and being stored in the containing grooves in the folding state. The system further comprises an opening and closing mechanism used for driving the gate unit to move between the water retaining position and the storage position. An openable sealing cabin cover is arranged at the top of the accommodating groove, and a water spraying device is arranged to remove sediments; a gap is formed between every two adjacent gate units, and the telescopic lateral water stop structures are used for blocking the gaps. A maintenance channel and a water pumping device are arranged in the main body structure, and system maintenance and operation are facilitated.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, specifically to a variable span multi-section combined tide gate system and its construction method. Background Technology

[0002] Seawater intrusion is a common natural phenomenon in estuaries and coastal areas. Especially during storm surges, abnormal tides, spring tides, or insufficient upstream water flow, seawater can flow upstream along river channels, causing flooding, water salinization, and damage to infrastructure in coastal areas. Therefore, to ensure flood control safety in coastal areas, floodgate systems have become important hydraulic engineering facilities and have been widely used in water conservancy projects throughout history.

[0003] Existing moisture-proof gates come in a variety of structural forms, mainly including the following categories: Vertical lift gates: These gates are typically installed above river channels or mouths, and are vertically raised and lowered from the upper support structure using a winch or hydraulic system. While simple in construction, the gate body remains above the water surface when not in a tidal state, potentially interfering with navigation. Furthermore, their long-term exposure to the external environment leads to corrosion and maintenance difficulties.

[0004] Rotary opening and closing gates: These include single-sided hinged or double-sided symmetrical opening gate structures, which can be stored on both sides of the gate pier under normal conditions and closed by rotation when needed. This type of structure is suitable for small to medium span waterways, but for large span waterways, the project is more difficult to implement due to the limited gate length and high rotational resistance.

[0005] Rotating arc gates: A typical example is the tide gate in the Dutch Delta project, which uses a large-span arc gate to rotate from the bank to the middle of the estuary to cut off the water flow. These gates have high structural strength and good compressive strength, but they usually require large-scale permanent support structures on the riverbank or in the water, resulting in large-scale engineering projects, high investment, and significant impacts on river ecology and navigation.

[0006] Although existing technologies have achieved good moisture-proof effects in different application scenarios, they generally have the following shortcomings: Occupying water surface space and affecting navigation: Most existing moisture-proof structures need to be installed in or above the river channel for a long time, which hinders normal navigation. Difficult to adapt to ultra-large span estuaries: Current technical solutions are mostly concentrated on the scale of tens of meters, which is difficult to implement effectively for estuary areas with spans of hundreds of meters or even several kilometers. The basic structure is huge and the amount of river channel modification is large: In order to realize the opening and closing function, it is often necessary to lay permanent civil engineering structures such as piers, tracks, and flow guides in the river channel, which will interfere with the natural water flow pattern.

[0007] Therefore, there is an urgent need for a new type of tide-proof system that can reliably open and close, provide good water-stopping performance, and be easy to maintain, without affecting river navigation, occupying water surface space, and adapting to any span. In particular, for the application scenario of large-span unobstructed river estuaries, there is still a lack of a modular, fully submersible, and adaptable ultra-large tide-blocking gate system that can adapt to complex terrain changes. Summary of the Invention

[0008] To address the aforementioned shortcomings or defects in the existing technology, this invention provides a variable-span, multi-section, combined tide gate system, as well as a method for constructing the system. The tide gate system allows for flexible adjustment of its length through unit combination, and the entire system is installed below the riverbed, thus not affecting river navigation.

[0009] To achieve the above objectives, the present invention provides a variable span multi-section combined tide gate system, comprising: The main structure is located at the river mouth and extends along the width of the river mouth to form a tide-blocking structure across the river channel. Multiple receiving tanks are arranged at intervals along the main structure inside the main structure, and the receiving tanks are located below the riverbed. Multiple gate units are set in the receiving tank. Each gate unit can be raised and lowered independently to form a moisture barrier structure when raised and to be stored in the receiving tank when retracted. An opening and closing mechanism, which is installed in or connected to the main concrete structure, is used to drive the gate unit to move between the water-blocking position and the storage position.

[0010] Preferably, the top of the receiving groove is provided with an openable and closable sealing cover, which opens when the gate is raised and closes when the gate is retracted, so as to seal the top of the receiving groove when the gate unit is in the retracted state, forming a sealed space; The upper side of the sealing cover is configured as an upwardly protruding conical or arc-shaped structure; a water spraying device is provided on the upper side of the sealing cover, and the water spraying device sprays water to rinse the top of the sealing cover. The main structure is equipped with a pumping device to pump out water accumulated in the receiving tank when the receiving tank is sealed.

[0011] Preferably, multiple gate units are spaced apart along the main structure, and when all the gates are raised, they form a continuous tide-blocking structure to cut off the river. A gap is provided between adjacent gate units, and at least one side of each gate unit is provided with a retractable lateral water-stop structure, which extends after the gate unit is raised and cooperates with the water-stop structure of the adjacent gate unit to seal the gap.

[0012] Preferably, the lateral water-stopping structure includes a water-stopping plate that can slide laterally along the gate, a pushing device, and a sealing element. The pushing device is used to control the water-stopping plate to extend in the water-blocking state and press the adjacent water-stopping plates to form a sealing contact. The pushing device is an electric push rod mechanism or a hydraulic telescopic cylinder, which is linked to the control system to execute the extension and retraction of the water-stopping structure. The sealing element of the water-stopping structure is made of elastic material and has multiple flexible contact surfaces to compensate for the relative offset between the gates.

[0013] Preferably, the main structure is an integral or segmented prefabricated structure, located below the riverbed, with its top flush with the riverbed. The main structure is a trough structure, with multiple receiving slots arranged sequentially along the length of the main structure inside. The main structure is provided with a through maintenance channel along its extension direction, and a water pumping device is provided in the maintenance channel to pump out the water accumulated in the receiving tank when the receiving tank is sealed. The maintenance passage is equipped with a side door structure that communicates with the receiving tank. When the receiving tank is pumped out, the water can be entered through the side door.

[0014] Preferably, the opening and closing mechanism includes a hydraulic lifting device disposed in the main structure, used to lift the gate unit from below to the water-blocking position; and to store it in the receiving groove when the gate body is in the retracted state.

[0015] Preferably, the hydraulic lifting device is located inside the gate unit, driving the gate unit to rise and fall along the vertical direction of the receiving groove; The hydraulic cylinder and piston rod of the hydraulic lifting device are respectively connected to the gate unit and the bottom of the receiving tank; the gate unit is equipped with a hydraulic cylinder body, which is connected to an external liquid supply system, and a piston rod is set at the bottom of the gate. The piston rod is driven by the pressure change in the cylinder body to drive the gate to rise and fall.

[0016] Preferably, each gate unit is provided with guide devices on both sides, and the guide devices cooperate with the sidewall of the corresponding receiving groove to provide lateral constraints during the raising and lowering of the gate unit; The guiding device includes a guide rail and a guide slider. The guide rail is disposed on the inner wall of the receiving groove, and the guide slider is disposed on the side of the gate unit and slides along the guide rail.

[0017] Preferably, each gate unit is provided with a retractable outrigger structure, which extends to support the gate after the gate is raised to the water-blocking position; The retractable support leg structure is located on the front and / or rear side of the gate unit, including a hydraulic telescopic arm and a support foot. After being extended, the support foot contacts the top of the main structure to form a triangular support structure. When the gate is in the retracted state, the support leg structure can be completely retracted into the gate body or close to the side of the gate body. The outrigger structure is linked to the opening and closing mechanism, automatically extending after the gate is raised to the water-blocking position and automatically retracting before the gate descends.

[0018] This invention also proposes a method for constructing a variable-span, multi-section combined tide-blocking gate system, comprising the following steps: Multiple precast concrete main structure segments are constructed, each segment including several receiving slots for installing gate units, and the top of the precast structure is open. The prefabricated main structure sections were moved to the construction site at the river mouth by water transport. The structural section was lowered below the riverbed using either water ballast or floating crane methods, ensuring its top was flush with the riverbed. The structural sections are sealed together by mechanical connection or wet joint, forming a continuous channel structure that extends along the width of the river mouth. A sealed hatch assembly and an automatic water spray system are installed on top of the main structure. Gate units are installed sequentially in each receiving tank and connected to a preset opening and closing mechanism; An inspection passage, a drainage system, and a hydraulic opening and closing system are installed within the main structure. Complete system integration and sealing testing to form a working moisture barrier gate system.

[0019] This invention provides a variable-span, multi-section combined tide gate system, which can solve the problems of limited layout, navigation obstruction, complex construction, and difficult maintenance of existing tide gates in large-span estuary scenarios. It has the following significant technical advantages and beneficial effects: Unobstructed navigation and meeting the requirements for flood control in estuaries with ultra-large spans. This system features a main structure deployed below the riverbed, with multiple independent containment tanks within it. When not in operation, each gate unit is completely concealed beneath the riverbed, occupying no surface or channel space and ensuring continuous navigation at the estuary. The system employs a multi-section modular design, allowing for flexible gate unit placement based on estuary width, achieving "stepless variable span." It is particularly suitable for tidal defense in estuaries with widths ranging from hundreds of meters to kilometers, overcoming the dimensional limitations of traditional gate structures.

[0020] The overall system is highly scalable and adaptable to various terrains and functional upgrade requirements. The main structure can be designed as a straight or curved layout according to the estuary terrain, and the arrangement of the containment tanks is flexible, making it suitable for areas with complex terrain. The system supports the addition of sensor control, intelligent linkage, anti-corrosion coating, or remote operation and maintenance systems in the future, and has good potential for technological expansion.

[0021] The combination of concealed structure and modular design enhances system adaptability and ease of maintenance. All gate units are housed in independent receiving tanks located below the riverbed. When the gates are retracted, they are roughly flush with the riverbed, ensuring unimpeded natural water flow and preserving the ecological landscape. The modular arrangement of multiple receiving tanks facilitates prefabrication, transportation, and placement during construction, and also allows for later localized maintenance or expansion.

[0022] The independent lifting and lowering of the gates, in conjunction with adjacent water-stopping structures, improves the overall sealing effect and operational stability. Each gate unit can be independently raised and lowered, providing excellent scheduling flexibility during local maintenance or partial water blocking. A certain gap is designed between adjacent gates to eliminate the risk of gate jamming due to foundation settlement or structural deformation. Combined with a retractable lateral water-stopping structure, the water-stopping plate and elastic sealing element effectively seal gaps, ensuring the continuity and airtightness of the overall water-blocking surface.

[0023] The sealed structure design enhances durability and silt resistance. The sealed cover at the top of the containment tank forms a closed space after the gate is retracted, effectively preventing river water and silt from entering the tank and avoiding corrosion or blockage caused by prolonged immersion or burial of the equipment. The sealing cover is designed with a conical arched structure and an automatic water spray device at the top, which can clean the top sediment before tides or during maintenance, preventing sand and mud accumulation from affecting opening and closing operations and enhancing the system's self-cleaning ability.

[0024] In summary, the variable span multi-section combined tide gate system provided by this invention has significant advantages in terms of structural design, sealing performance, adaptability, construction and maintainability. It is especially suitable for tide and flood control projects under complex conditions such as wide river mouths, large navigation volumes, and strong tidal impacts, and has broad application prospects and engineering value.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the gate unit of the tide-blocking gate system of the present invention in the retracted state; Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the tide-blocking gate system with the gate unit raised. Figure 3 This is a top view of the tide-blocking gate system.

[0027] Explanation of reference numerals in the attached figures 1-Main structure; 2-Gate unit; 3-Opening and closing mechanism; 4-Sealing cover; 5-Side water-stopping structure; 6-Retractable support leg structure; 7-Corner. Detailed Implementation

[0028] The following provides a detailed description of specific embodiments of the present invention. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0029] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0030] This invention provides a variable span multi-section combined tide gate system, which is suitable for use in wide water areas such as river estuaries to cope with sudden hydrological risks such as storm surges, high tides, and seawater backflow, while also ensuring the smooth flow of ship navigation and daily river water.

[0031] The system is laid out laterally along the width of the river mouth, and consists of multiple structural units arranged continuously to form a continuous tide-blocking system. When not in operation, the entire system is "invisible," with all structures concealed below the riverbed, not affecting navigation or natural water flow. When tide blocking is required, multiple gate units 2 can rise synchronously or sequentially from the seabed to form a continuous tide-blocking structure, exhibiting extremely high adaptability and reliability.

[0032] Reference Appendix Figure 1-3 The moisture-blocking system mainly includes the following core components: Main Structure 1: This structure is a trough-type concrete structure laid below the riverbed and extending along the width of the river mouth. The main structure 1 contains multiple receiving troughs to accommodate the gate units 2, arranged at intervals and continuously along the system direction. The main structure 1 is entirely submerged below the riverbed, with its top flush with the riverbed, ensuring that it does not affect normal river flow or navigation when not blocking tides.

[0033] Gate Unit 2: Multiple independently movable tide-blocking gates. Each gate unit 2 is installed in a corresponding receiving slot and can switch between a "retracted state" (gate retracted into the slot) and a "raised state" (gate raised to the tide-blocking position) driven by a hydraulic or other opening and closing mechanism 3. Multiple gate units 2 can be controlled independently or synchronously according to actual hydrological and navigation needs to achieve continuous tide-blocking function.

[0034] Opening and closing mechanism 3: An execution component used to drive the gate unit 2 to rise and fall. Its location can be inside the main structure 1 or integrated into the gate structure. It can take the form of a hydraulic lifting device, an electric push rod, a winch mechanism, etc. The specific structure can be flexibly adjusted according to the engineering conditions.

[0035] Sealing cover 4: To ensure complete closure of the containment tank when the gate unit 2 is retracted, preventing sediment deposition and biological entry, the system is equipped with an openable and closable sealing cover 4 structure on top of each containment tank. Furthermore, to further reduce sediment accumulation, a water spray device is installed on top of the sealing cover 4. This water spray device is supplied with water by a pump located inside the system, allowing for periodic cleaning of the surface of the sealing cover 4.

[0036] Lateral water-stopping structure 5: Since the system adopts a structure scheme in which multiple gate units 2 are set independently, in order to ensure the flexibility of lifting and lowering operations between each unit and the tolerance of structural tolerances, a reasonable gap needs to be set between multiple adjacent gates to avoid structural interference or jamming. To solve the problem of water leakage caused by the gap, this system is equipped with a retractable lateral water-stopping structure 5 on at least one side of each gate unit 2.

[0037] Guiding and support structure: Used to ensure the stability of the gate unit 2 during lifting and lowering and the safety of its load-bearing capacity when raised. Includes guide rails and sliders on both sides of the gate body, and retractable support leg structures 6 to withstand forward and backward water pressure.

[0038] Maintenance and repair structure: The main structure 1 has a through-type maintenance passage, which facilitates personnel access, equipment maintenance, and drainage of sealed chambers. It also integrates necessary supporting facilities such as pumping system, hydraulic system, and control system.

[0039] Main structure 1: Located at the river mouth, extending along the width of the river mouth, it is used to cross the river channel to form a tide-blocking structure. The main structure 1 is set below the riverbed, with its top flush with the riverbed, so that when the gate unit 2 is in the retracted state, it will not affect the flow of river water or the passage of ships.

[0040] Location: The main structure 1 is horizontally positioned at the river mouth, extending along the width of the river mouth to form a continuous water-retaining barrier. The riverbed depth typically increases gradually from the bank to the middle of the river; therefore, the height of the main structure 1 can be designed according to the changes in riverbed depth, ensuring that each receiving tank has sufficient space below the riverbed to accommodate the gate unit 2. The main structure 1 can be prefabricated as a whole and then sunk, or it can be prefabricated in sections and sunk segment by segment, forming a continuous structure through mechanical connections or wet joints.

[0041] Structural Features: The main structure 1 is a tank structure, generally elongated or modularly segmented. The cross-section of the tank can be optimized according to the water flow and gate size to ensure structural strength and stability. The inner wall and bottom of the main structure 1 are made of reinforced concrete to meet the requirements for long-term underwater load-bearing and corrosion resistance. The main structure 1 has a continuous maintenance passage along its length for later maintenance, repair, and pumping / drainage operations.

[0042] The main structure 1 can be cast as a whole or prefabricated in sections and then sunk below the riverbed. The prefabricated section layout facilitates transportation and installation, while reducing the difficulty of underwater construction and improving construction accuracy and safety. The top opening of each structural section is used to accommodate the installation of the gate unit 2 and the arrangement of the sealing cover 4 components.

[0043] Receiving troughs: Multiple receiving troughs are spaced along the length of the main structure 1, each trough accommodating one gate unit 2. The number, size, and spacing of the receiving troughs can be designed according to the river width, riverbed depth, and required water-retaining height. The top of the receiving troughs is below the riverbed, ensuring that the gate unit 2 does not protrude from the riverbed surface when retracted.

[0044] Each receiving tank is relatively independent, and its internal space can be divided by the walls of the main structure 1 or supported by reinforcing ribs to form a stable structure, ensuring that it will not deform under the action of gate lifting and tidal forces. The bottom of the receiving tank is fixedly connected to the base plate of the main structure 1, and the top is reserved for subsequent installation of the sealing cover 4 and the opening and closing mechanism 3.

[0045] The receiving tanks are arranged sequentially along the length of the main structure 1, forming multiple parallel functional units. Structural gaps exist between adjacent receiving tanks to ensure the overall stability of the main structure 1 and the independent raising and lowering of the gate units 2. These structural gaps can be formed by reinforced concrete walls of appropriate thickness or by pre-reserved gaps in the segmented prefabricated structure. The overall extension direction of the main structure 1 is roughly perpendicular to the river flow direction, but it can also be designed to extend in a curved manner depending on the shape of the river mouth and construction conditions, to adapt to special river or waterway requirements. The consistent arrangement of the receiving tanks along the extension direction facilitates the installation, raising and lowering of the gate units 2, as well as subsequent maintenance and management.

[0046] The main structure 1 features a continuous maintenance passageway along its extension direction, allowing personnel and equipment access to each containment tank for maintenance and repair. The maintenance passageway connects to the containment tanks via side doors or inspection ports, facilitating entry after water drainage. A pumping device and drainage system can be installed inside the maintenance passageway to ensure safe operation during drainage work within the sealed containment tanks.

[0047] Gate Unit 2: Reference Appendix Figure 1 and attached Figure 2When the gate unit 2 is raised, it forms a tide-blocking structure, cutting off the river and achieving the functions of tide prevention and flood control; when it is retracted, the gate unit 2 is stored in the receiving tank, allowing the river water to flow normally without obstructing navigation.

[0048] The gate unit 2 is installed in the receiving groove of the main structure 1, and each gate unit 2 can be raised and lowered independently. Multiple gate units 2 are arranged sequentially at intervals along the length of the main structure 1. The interval distance is designed according to the size of the gate unit 2, the lifting space and the operation safety requirements to ensure that no collision occurs when each gate unit 2 is raised and lowered independently.

[0049] Each gate unit 2 is an integral reinforced concrete or steel structure gate with sufficient strength and rigidity to withstand water pressure and tidal forces. The height and width of the gate unit 2 are designed based on the river mouth width, riverbed depth, and required water-retaining height.

[0050] An opening and closing mechanism 3 is provided between the bottom of the gate unit 2 and the bottom of the receiving groove of the main structure 1 for raising and lowering the gate unit 2. Guide devices (such as guide rails and guide sliders) are provided on both sides of the gate unit 2, which slide along the side wall of the receiving groove to ensure that the gate unit 2 maintains lateral constraint during the raising and lowering process and prevents tilting or deviation.

[0051] Lateral water-stopping structure 5: Reference Appendix Figure 3 When the gate unit 2 is in the raised state, it fills the gap between the gate units 2 to form a continuous moisture barrier structure.

[0052] In this invention, multiple gate units 2 are spaced apart along the main structure 1. When all gate units 2 are raised, a continuous tide-blocking structure is formed, effectively cutting off the river. However, to ensure that each gate unit 2 does not interfere with or collide with each other during raising and lowering, a certain gap must be reserved between adjacent gate units 2. This gap can cause water leakage when the gate is raised to form the tide-blocking structure, thus affecting the overall tide-blocking effect. To solve this problem, this invention provides a retractable lateral water-stopping structure 5 on at least one side of each gate unit 2, which extends after the gate unit 2 is raised and cooperates with the water-stopping structure of the adjacent gate unit 2 to seal the gap.

[0053] The lateral water-stopping structure 5 includes a water-stopping plate that can slide laterally along the gate, a pushing device, and a sealing element. Driven by the pushing device, the water-stopping plate can extend outwards in a water-blocking state, contacting the water-stopping plate of the adjacent gate unit 2 to form a sealing contact surface. The pushing device can be an electric push rod mechanism or a hydraulic telescopic cylinder, and the extension and retraction of the water-stopping plate are executed in conjunction with the control system. The sealing element is made of elastic material and has multiple flexible contact surfaces to compensate for slight relative misalignments between the gate units 2, thereby ensuring the reliability of the sealing effect.

[0054] During system operation, when gate unit 2 rises to the water-blocking position, the pushing device drives the water-stop plate to extend outward and press against the water-stop plate of the adjacent gate unit 2, thereby sealing the gap and preventing water leakage. When gate unit 2 descends to the retracted position, the pushing device controls the water-stop plate to retract into the gate body or close to the side of the gate body, ensuring that the gate is smoothly retracted without interfering with the lifting and lowering operation of the adjacent gate unit 2.

[0055] The sealing element of the water-stop structure is made of elastic material, which can maintain close contact with the adjacent water-stop plate during the raising and lowering of the gate unit 2, thereby effectively preventing water leakage. The sealing element has multiple flexible contact surfaces, each of which can elastically deform with slight relative displacement between the gate units 2 to compensate for displacement caused by installation errors, structural settlement, or operational vibration, thus ensuring that the water-stop structure has a reliable sealing effect under different operating conditions. In addition, the elastic material of the sealing element can withstand the long-term action of river water and external erosion, ensuring that the lateral water-stop structure 5 maintains stable performance during multiple raising and lowering cycles.

[0056] Through the above design, the lateral water-stopping structure 5 of the present invention can achieve effective moisture-blocking function when there is a gap in the gate unit 2, while ensuring smooth gate lifting and lowering and the safety of system operation, and facilitating inspection and maintenance through the maintenance channel.

[0057] Opening and closing mechanism 3: The opening and closing mechanism 3 of this invention is disposed in or connected to the main structure 1, and is used to drive the gate unit 2 to move between the water-blocking position and the retracted position, thereby realizing the lifting and lowering control of the gate unit 2. Specifically, the opening and closing mechanism 3 includes a hydraulic lifting device, which can be disposed inside the gate unit 2 or inside the main structure 1. By connecting with the gate unit 2, it realizes the function of lifting the gate from below to the water-blocking position. In the retracted state of the gate, the hydraulic lifting device is retracted into the receiving groove along with the gate unit 2, without affecting the passage of the river and the water flow.

[0058] The basic components of a hydraulic lifting device include a hydraulic cylinder, a piston rod, a cylinder body, and a piping system connected to an external hydraulic supply system. The hydraulic cylinder is connected to gate unit 2, and the piston rod is connected to the bottom of the receiving tank. Changes in pressure within the hydraulic cylinder drive the piston rod to move up and down, thereby raising and lowering gate unit 2 vertically. The hydraulic lifting device can employ a single-cylinder or multi-cylinder linkage configuration to meet the lifting requirements of gate units 2 of different sizes and weights.

[0059] To ensure the stability of the gate unit 2 during lifting, the hydraulic lifting device can be linked with the control system to achieve automatic lifting, limit protection, and synchronous control functions. When multiple gate units 2 are operated simultaneously, the control system can ensure that each gate unit 2 lifts and lowers synchronously along a predetermined height, avoiding lateral interference or sealing failure caused by asynchrony.

[0060] Furthermore, the hydraulic lifting device can be used in conjunction with the gate unit 2 to provide lateral restraint and lifting guidance, ensuring that the gate maintains verticality and stability during lifting. The hydraulic system of the hydraulic lifting device can be equipped with a backup pump or a multi-channel diversion system to ensure that gate operation can still be completed in the event of a failure in the main fluid supply system.

[0061] Through the design of the opening and closing mechanism 3, the present invention can achieve efficient and reliable lifting control of the multi-section gate unit 2, adapt to different water levels and moisture-proof requirements, and ensure the safety and stability of the gate system during long-term use.

[0062] Sealing cap 4: In this invention, the sealing cover 4 is disposed on the top of the receiving groove of the main structure 1. It is used to seal the top of the receiving groove when the gate unit 2 is in the retracted state, forming a sealed space to prevent water or impurities from entering the receiving groove and to ensure the safe operation of the gate and internal devices. When the gate unit 2 is raised to the water-blocking position, the sealing cover 4 automatically opens, allowing the gate to rise and block moisture normally.

[0063] The upper side of the sealing cover 4 is designed with an upward-protruding conical or arc-shaped structure, which helps reduce the impact of water flow on the surface of the sealing cover 4 and facilitates the flow of rainwater or sediment down the surface, preventing water accumulation or sedimentation on the top of the sealing cover 4. To further maintain the cleanliness of the surface of the sealing cover 4, a water spray device is provided on the upper side of the sealing cover 4. The water spray device can be connected to the water supply system inside the main structure 1 through a pipeline to spray water onto the surface of the sealing cover 4 to wash away sediment on the top of the sealing cover 4 and prevent impurities from affecting the sealing performance.

[0064] In the sealed state, a pumping device is installed within the main structure 1 to drain any water that may accumulate during the sealing of the receiving tank, ensuring the sealed space remains dry and protecting the gate unit 2 and related facilities. The pumping device works in conjunction with the sealing cover 4 to form a completely closed environment after the gate unit 2 is retracted, preventing water from seeping into the receiving tank and causing damage or corrosion to the gate unit 2 and the hydraulic opening and closing system. See attached diagram for details. Figure 1 and attached Figure 2 The sealing cover can be integrated into the top of the gate unit 2.

[0065] Through the design of the sealing cover 4 and auxiliary facilities, the present invention ensures the sealing effect of the gate unit 2 in the retracted state, while facilitating maintenance and cleaning, and improving the overall reliability and service life of the moisture barrier gate system.

[0066] Guiding device: The guiding device in this invention is disposed on both sides of each gate unit 2 to provide lateral constraints during the lifting and lowering of the gate unit 2, ensuring that the gate unit 2 lifts and lowers smoothly along the predetermined direction of the receiving groove, and avoiding interference with the receiving groove wall or adjacent gate unit 2 due to lateral offset during the lifting and lowering process.

[0067] The guiding device includes a guide rail and a guide slider. The guide rail is disposed on the inner wall of the receiving groove and extends vertically along the receiving groove; the guide slider is disposed on the side of the gate unit 2 and can slide along the guide rail. When the gate unit 2 is raised and lowered under the drive of the opening and closing mechanism 3, the guide slider slides smoothly within the guide rail, thereby achieving vertical constraint of the gate unit 2.

[0068] A gap or wear-resistant material is provided between the guide slider and the guide rail to reduce friction and wear, while allowing a certain range of tolerance to accommodate the minute displacement of the gate unit 2 caused by temperature changes or stress. The guide device ensures the safe and stable raising and lowering of the gate unit 2 in high-speed or high-flow water environments, and extends the service life of the gate unit 2 and the receiving tank.

[0069] Through the design of the above-mentioned guiding device, the gate unit 2 can maintain precise positioning in both the retracted and raised states, ensuring the overall reliability and accuracy of the gate lifting system.

[0070] Retractable outrigger structure 6: Each gate unit 2 in this invention is provided with a retractable support leg structure 6, which provides support after the gate is raised to the water-blocking position, so that the gate unit 2 remains stable when subjected to water pressure. The retractable support leg structure 6 is located on the front and / or rear side of the gate unit 2, and includes a hydraulic telescopic arm and a support foot.

[0071] After the gate is raised to the water-blocking position, the hydraulic telescopic arm drives the support feet to extend downwards and contact the bottom of the main structure 1, forming a stable support state. The support feet, the bottom of the gate, and the bottom of the main structure 1 form a triangular support structure, thereby enhancing the gate unit 2's resistance to overturning and bending.

[0072] When the gate is in the retracted state, the support leg structure can be completely retracted into the gate unit 2 or close to the side of the gate body to avoid affecting the storage space of the gate in the receiving slot. The support leg structure is linked to the opening and closing mechanism 3: it automatically extends after the gate is raised to the water-blocking position and automatically retracts before the gate is lowered to the retracted position, realizing automation and safety of operation.

[0073] Through the above design, the retractable support leg structure 6 of the present invention can provide reliable support when the gate unit 2 is raised to form a tide barrier, ensuring the stability of the gate unit 2 under the action of water flow. At the same time, it does not occupy extra space when stored, ensuring the compactness and operability of the entire tide barrier system.

[0074] Cow leg 7 structure: In this invention, each gate unit 2 is provided with an outwardly retractable bracket 7 structure at its bottom position, which is used to provide additional support when the gate is raised to the water-blocking position, thereby reducing the load pressure of the opening and closing mechanism 3 on the gate's own weight.

[0075] The bracket 7 structure can extend outward in a horizontal or inclined direction during the gate's raising process. When the gate unit 2 is raised to the predetermined water-blocking height, the receiving groove of the main structure 1 is provided with a slot near the top that cooperates with the bracket 7 structure. After the bracket 7 extends, it can automatically lock into the slot to support the gate unit 2.

[0076] Through the cooperation of the bracket 7 and the slot, the gate unit 2 can stably suspend or support its own weight when raised, thereby reducing the load on the hydraulic lifting device when the gate is in the water-blocking position and improving the durability and safety of the opening and closing system. At the same time, the bracket 7 structure can automatically retract before the gate is lowered to the storage position, avoiding interference with the gate's storage and lifting operations in the receiving slot.

[0077] The above design enables the gate unit 2 of the present invention to be lifted by the opening and closing mechanism 3 and reliably supported by the bracket 7 structure when it is in the raised state, thereby improving the stability and safety of the overall system operation.

[0078] Inspection and maintenance: In this embodiment, the main structure 1 is provided with a through maintenance passage along its extension direction. The maintenance passage facilitates the safe entry of personnel into the main structure 1 for operation during the operation or maintenance of the gate system. The maintenance passage can be connected to the outside through an entrance or side door structure, facilitating access to the various accommodating areas within the main structure 1.

[0079] The maintenance access passage is equipped with a pumping system to remove water from the sealed container, keeping both the access passage and the container dry and ensuring the safety of personnel during operation or maintenance. The pumping system may include an electric water pump, valves, and drainage pipes, and its operation is centrally managed through a control system.

[0080] Along the maintenance access route, side gate structures connected to each receiving tank are installed. These side gate structures can be opened mechanically or hydraulically, allowing personnel to enter each receiving tank for inspection, cleaning, or maintenance after the accumulated water has been pumped out. Each side gate structure should form a seal with the receiving tank to prevent water backflow into the maintenance access route during gate system operation.

[0081] In addition, pipelines, valves, and control lines can be arranged within the maintenance passage for linkage with the opening and closing mechanism 3, lateral water-stopping structure 5, support leg structure, and sealing cover 4 of gate unit 2, facilitating regular inspection, adjustment, lubrication, and system commissioning. The space and layout of the maintenance passage should meet the needs of personnel passage, operation, and maintenance, while also considering the ease of placement and use of maintenance equipment and operating tools.

[0082] With the above-mentioned inspection and maintenance structure, gate unit 2 and auxiliary devices can be regularly inspected, maintained or urgently handled without affecting the normal operation of the gate system, thereby improving the reliability, maintainability and service life of the entire variable span multi-section combined tide gate system.

[0083] Work methods: The gate is raised to the water-blocking position: When moisture blocking is required, water is first introduced into the receiving tank to fill it. Then, the opening and closing mechanism 3 drives each gate unit 2 to rise vertically along the receiving tank. When multiple gate units 2 rise to the predetermined water-blocking height, the entire gate system forms a continuous moisture-blocking structure, effectively preventing seawater backflow or river water backflow. During the gate raising process, the guide devices on both sides of each gate unit 2 ensure that the gate rises and falls smoothly in the vertical direction, avoiding lateral deviation and interference.

[0084] Gap sealing: Since gaps are required during the raising and lowering of each gate unit 2 to avoid mutual interference, the system uses a retractable lateral water-stop structure 5 that extends after the gate unit 2 is raised and cooperates with the water-stop structure of the adjacent gate unit 2 to seal the gaps and ensure moisture-proof effect. The sealing element of the water-stop structure is made of elastic material, and multiple flexible contact surfaces can compensate for the relative offset between the gates to ensure reliable sealing.

[0085] The function of the support and bracket 7 structure is as follows: After the gate is raised to the water-blocking position, the retractable bracket structure 6 automatically extends to support the gate unit 2 and forms a triangular support structure in contact with the bottom or top of the main structure 1, increasing the stability of the gate. At the same time, the retractable bracket 7 structure at the bottom of the gate unit 2 extends and engages with the slot at the top of the receiving groove of the main structure 1, realizing the self-support of the gate unit 2 and reducing the load on the opening and closing mechanism 3 in the long-term water-blocking state.

[0086] Use of the sealing cover 4 and water spray device: When the gate is in the retracted state, the openable sealing cover 4 at the top of the receiving tank is closed, forming a sealed space to prevent water from entering the receiving tank. The water spray device at the top of the sealing cover 4 can spray water to flush the cover body, remove sediment, and ensure the normal operation of the sealing cover 4. When the gate is raised to the water-blocking position, the sealing cover 4 automatically opens to make room for the gate to rise and fall.

[0087] When the sluice gate needs to be de-tide-blocking, the opening and closing mechanism 3 drives the sluice gate unit 2 to descend vertically, and the lateral water-stopping structure 5 retracts into the sluice gate unit 2, releasing the gap seal. The telescopic outrigger structure 6 automatically retracts, the bracket structure 7 disengages from the slot, and the sluice gate unit 2 smoothly retracts into the receiving tank; then the water in the receiving tank is pumped out. The entire system returns to the non-tide-blocking state, ensuring navigation or normal water flow in the river.

[0088] Control: Throughout the entire operation, the opening and closing mechanism 3, the lateral water-stopping structure 5, the support leg structure, the corbel structure 7, the guide device, and the sealing cover 4 are linked together through the control system. The system can control the raising and lowering of the gate according to water level, tidal changes, or automatic preset programs to achieve safe, reliable, and automated tide-blocking operations.

[0089] Construction method (construction method): The method for constructing a variable span multi-section combined tide gate system described in this embodiment includes the following steps: Main Structure 1 Prefabrication: Multiple concrete main structure sections are prefabricated on land. Each section includes several receiving slots for installing gate units 2. An opening is provided at the top of the prefabricated structure for subsequent installation of the sealing hatch and gate units 2. Main Structure 1 can be an integral or segmented structure to ensure stability and reliability during subsequent immersion.

[0090] Main Structure 1 Transportation: The prefabricated main structure sections will be transported to the construction site at the river mouth by water transport methods, such as barges or floating cranes, to ensure the safety and stability of each section during transportation.

[0091] Main Structure 1 Submersion: Using water ballast or floating crane methods, each structural section will be submerged below the riverbed, ensuring that the top of Main Structure 1 is flush with the riverbed. This will guarantee that the river flow and navigation are not affected when the gate is closed. During submersion, the position of each structural section must be accurate, and they should be arranged along the width of the river mouth to form a continuous channel structure.

[0092] Structural segment connection: The prefabricated structural segments are sealed together by mechanical connection or wet joint to form a continuous main structure 1 extending along the width of the river mouth. The connection should ensure watertightness and structural integrity, and meet the requirements of subsequent gate installation and opening / closing operations.

[0093] Sealing cover and auxiliary device installation: An openable and closable sealing cover assembly and an automatic water spray device are installed on the top of the main structure 1 to ensure reliable sealing of the top of the receiving tank when the gate is retracted, and to remove deposits on the sealing cover 4 in a timely manner.

[0094] Gate unit 2 installation: Gate units 2 are installed in each receiving slot in sequence and connected to the preset opening and closing mechanism 3, guide device, support leg structure and lateral water-stopping structure 5 to ensure that each gate unit 2 can be raised and lowered independently and form a continuous tide-blocking surface when raised.

[0095] Maintenance access and auxiliary system layout: A maintenance access road shall be provided within the main structure 1, and a pumping device and a hydraulic opening and closing system shall be installed. The maintenance access road shall be connected to each receiving tank, so as to facilitate access to the receiving tank for maintenance or repair when necessary through side doors.

[0096] System commissioning and sealing test: After completing the installation of gate unit 2, opening and closing mechanism 3, water-stop structure, support leg structure, and bracket 7 structure, the entire system was integrated and debugged to ensure that the operation of each component was coordinated and the sealing was reliable. Water tightness test and functional test were conducted to verify the system's operating effect in moisture-proof and retraction states.

[0097] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0098] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0099] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A variable span multi-section combined tide gate system, characterized in that, include: The main structure (1) is located at the river mouth and extends along the width of the river mouth to form a tide-blocking structure across the river channel. Multiple receiving slots are provided at intervals along the main structure (1) inside the main structure (1), and the receiving slots are located below the riverbed; Multiple gate units (2) are set in the receiving groove. Each gate unit (2) can be raised and lowered independently to form a moisture barrier structure when raised and to be stored in the receiving groove when retracted. The opening and closing mechanism (3) is located in or connected to the main structure (1) and is used to drive the gate unit (2) to move between the water blocking position and the storage position.

2. The system according to claim 1, characterized in that, The top of the receiving groove is provided with an openable and closable sealing cover (4). The sealing cover (4) opens when the gate is raised and closes when the gate is retracted, so as to seal the top of the receiving groove when the gate unit (2) is in the retracted state, forming a sealed space. The upper side of the sealing cover (4) is configured as an upwardly protruding conical or arc-shaped structure; a water spraying device is provided on the upper side of the sealing cover (4), and the water spraying device sprays water to flush the top of the sealing cover (4); The main structure (1) is equipped with a pumping device for pumping out water accumulated in the container when the container is sealed.

3. The system according to claim 1, characterized in that, Multiple gate units (2) are spaced along the main structure (1), and when all the gates are raised, a continuous tide-blocking structure is formed to cut off the river; A gap is provided between adjacent gate units (2), and at least one side of each gate unit (2) is provided with a retractable lateral water-stop structure (5) for extending after the gate unit (2) is raised and cooperating with the water-stop structure of the adjacent gate unit (2) to seal the gap.

4. The system according to claim 3, characterized in that, The lateral water-stopping structure (5) includes a water-stopping plate that can slide laterally along the gate, a pushing device, and a sealing element. The pushing device is used to control the water-stopping plate to extend in the water-blocking state and press the adjacent water-stopping plates to form a sealing contact. The pushing device is an electric push rod mechanism or a hydraulic telescopic cylinder, which is linked to the control system to execute the extension and retraction of the water-stopping structure. The sealing element of the water-stopping structure is made of elastic material and has multiple flexible contact surfaces to compensate for the relative offset between the gates.

5. The system according to claim 1, characterized in that, The main structure (1) is an integral or segmented prefabricated structure, which is set below the riverbed and its top is flush with the riverbed; the main structure (1) is a trough structure, with multiple receiving troughs arranged sequentially along the length of the main structure (1) inside. The main structure (1) is provided with a through maintenance channel along its extension direction. A water pumping device is provided in the maintenance channel to pump out the water accumulated in the storage tank when the storage tank is sealed. The maintenance passage is equipped with a side door structure that communicates with the receiving tank. When the receiving tank is pumped out, the water can be entered through the side door.

6. The system according to claim 1, characterized in that, The opening and closing mechanism (3) includes a hydraulic lifting device provided in the main structure (1) for lifting the gate unit (2) from below to the water blocking position; and storing it in the receiving groove when the gate body is in the retracted state.

7. The system according to claim 6, characterized in that, The hydraulic lifting device is installed inside the gate unit (2) and drives the gate unit (2) to rise and fall along the vertical direction of the receiving groove; The hydraulic cylinder and piston rod of the hydraulic lifting device are respectively connected to the gate unit (2) and the bottom of the receiving tank; the gate unit (2) is equipped with a hydraulic cylinder body, which is connected to the external liquid supply system. The bottom of the gate is equipped with a piston rod, which drives the gate to rise and fall by changing the pressure inside the cylinder.

8. The system according to claim 1, characterized in that, Each gate unit (2) is provided with a guide device on both sides. The guide device cooperates with the side wall of the corresponding receiving groove to provide lateral constraint during the lifting and lowering of the gate unit (2). The guiding device includes a guide rail and a guide slider. The guide rail is disposed on the inner wall of the receiving groove, and the guide slider is disposed on the side of the gate unit (2) and slides along the guide rail.

9. The system according to claim 1, characterized in that, Each gate unit (2) is provided with a retractable outrigger structure (6) for extending to support the gate after the gate is raised to the water-blocking position; The retractable support leg structure (6) is located on the front and / or rear side of the gate unit (2), including a hydraulic telescopic arm and a support foot. After the support foot is extended, it contacts the top of the main structure (1) to form a triangular support structure. When the gate is in the retracted state, the support leg structure can be completely retracted into the gate body or close to the side of the gate body. The outrigger structure is linked to the opening and closing mechanism (3) and automatically extends after the gate is raised to the water blocking position and automatically retracts before the gate is lowered.

10. A method for constructing a variable-span, multi-section combined tide-blocking gate system, characterized in that, Includes the following steps: Multiple precast concrete main structure segments are constructed, each segment including several receiving slots, which are used to install gate units (2), and the top of the precast structure is open; The prefabricated main structure sections were moved to the construction site at the river mouth by water transport. The main structural section is lowered below the riverbed by means of water ballast or floating crane, and its top is made level with the riverbed; The structural sections are sealed together by mechanical connection or wet joint, forming a continuous channel structure that extends along the width of the river mouth. A sealed hatch assembly and an automatic water spraying device are installed on the top of the main structure (1); Gate units (2) are installed sequentially in each receiving slot and connected to a preset opening and closing mechanism (3); An inspection passage, a drainage system and a hydraulic opening and closing system are provided in the main structure (1); Complete system integration and sealing testing to form a working moisture barrier gate system.

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