Bidirectional water retaining gate dam project

Abstract

The utility model discloses a two-way water retaining gate dam project which is composed of a water retaining panel, a hinge system, a rubber dam bag, a bottom plate, a pier wall, an energy dissipation and scour prevention system and a control system. The gate dam is characterized in that the outer side of the gate dam is surrounded by the water retaining panels to form a prism, the water retaining panels are connected through hinges, the water retaining panels and the bottom plate are connected through hinges, the rubber dam bag is located on the inner sides of the water retaining panels, one end of the dam bag adhesive tape is connected with the water retaining panels, the other end of the dam bag adhesive tape is connected with the bottom plate, the water retaining panels can protect the rubber dam bag, and the service life is prolonged. Ice and sharp floating objects can pass through the rubber dam bag, and the water retaining panel is controlled to rise and fall by controlling the volume of media filled in the rubber dam bag.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, and specifically relates to a two-way water retaining sluice dam project. Background Technique

[0002] The two-way water retaining sluice dam project is generally used at the estuary position, serving as a drainage sluice or a tide-blocking sluice. It is commonly found at the estuary of a river and is used for blocking the sea tide and discharging the flood of the river course.

[0003] The two-way water retaining sluice dam project built at the estuary of a river generally has multiple functions. It is necessary to store the river water, discharge the flood of the river course, and at the same time block the sea tide. The purpose of blocking the sea tide is, on the one hand, to prevent the intrusion of sea water into the river course and pollute the stored fresh water, and on the other hand, to prevent the damage to the river course and water conservancy projects caused by the impact of sea waves.

[0004] When the tide level is lower than the river storage level, the two-way water retaining sluice dam blocks the river water or opens the sluice to discharge the flood; when the tide level is higher than the river storage level or the tide level is equal to the river storage level, the two-way water retaining sluice dam blocks the sea water, and generally it is necessary to always prevent the backflow of sea water.

[0005] Divided from the structural type, the sluice dam project mainly has structural types such as miter gates, radial gates, flap gates, hydraulic gates, lifting flat gates, pneumatic shield dams, rubber dams, goggle gates, floating body gates, and sector gates.

[0006] From the perspective of construction cost and operation effect, the flap gate is prone to malfunction due to being stuck by sundries and is not suitable for two-way water retaining. The opening and closing equipment of miter gates, radial gates, flap gates, hydraulic gates, lifting flat gates, goggle gates, floating body gates, and sector gates has a complex structure, a large construction difficulty, a high cost, and a complex and cumbersome operation and management.

[0007] The rubber dam has certain advantages compared with the above sluice dam structures: it is easy to construct, and both the construction and operation and maintenance costs are relatively low. However, the rubber dam belongs to a flexible thin-wall structure and is prone to wear during operation. Especially when discharging water over the dam, it is prone to vibration and wear, and is also easily punctured and torn by floating trees and stones in the river, resulting in dam break disasters; during the process of the rubber dam collapsing, a small amount of remaining water in the dam bag is wrapped by the dam bag downstream of the dam axis and is difficult to discharge, forming a small dam water blocking phenomenon, which is not conducive to the flood discharge of the river course; when the water levels upstream and downstream are both high, the dam bag of the rubber dam will float under the action of buoyancy and is not easy to collapse flat, which also affects the flood discharge; limited by the strength of the dam bag rubber material, the designed dam height of the rubber dam generally does not exceed 5 meters, and the goal of tide blocking cannot be achieved for the estuary of a river with a relatively high tide level.

[0008] The air shield dam combines the respective advantages of flap gates and rubber dams. It has a simple structure and is easy to install. However, debris is easily accumulated on the backwater side of the air shield dam, which may damage the inflatable dam bag. Especially when used as a tidal dam, seawater or river water will impact mud and sand onto the backwater side of the air shield dam, making it impossible for the gate plate to be completely collapsed, affecting the river flood discharge.

[0009] Based on the above reasons, the existing tide-blocking dams at river estuaries all have various drawbacks, and there is an urgent need to develop a bidirectional dam that is easy to construct, requires less investment, has a good tide-blocking effect, and is simple to operate and manage. Utility Model Content

[0010] In order to solve the above problems, the utility model provides a bidirectional water retaining dam project. The technical solution of the utility model is as follows:

[0011] The bidirectional water retaining dam project is composed of a water retaining panel, an articulated system, a rubber dam bag, a bottom plate, a pier wall, an energy dissipation and anti-scouring system, and a control system. It is characterized in that a bottom plate is constructed at the estuary of the river, the water retaining panel is on the upper side of the bottom plate, the bottom plate and the water retaining panel and the water retaining panel are connected by an articulated system, the pier walls are at both ends of the water retaining panel and the rubber dam bag, the energy dissipation and anti-scouring system is on the downstream side of the bottom plate, and the control system is on the bank outside the river channel, and the control system is connected to the rubber dam bag through a pipeline.

[0012] The bidirectional water retaining dam project is characterized in that the outer side of the dam is surrounded by a water retaining panel, the water retaining panels and the water retaining panels and the bottom plate are connected by hinges, the rubber dam bag is located on the inner side of the water retaining panel, one end of the dam bag tape is connected to the water retaining panel, and the other end is connected to the bottom plate, the water retaining panel can protect the rubber dam bag and extend its service life, and can allow ice and sharp floating objects to pass through, and the rise and fall of the water retaining panel is controlled by controlling the volume of the medium filled in the rubber dam bag.

[0013] The material of the water retaining panel can be metal or other high-strength materials. There are 4 water retaining panels, namely the upstream upper panel, the upstream lower panel, the downstream upper panel, and the downstream lower panel. The upstream upper panel and the upstream lower panel, the upstream upper panel and the downstream upper panel, the downstream upper panel and the downstream lower panel, the upstream lower panel and the bottom plate, and the downstream lower panel and the bottom plate are all connected by a hinge system to form a closed prism. Due to the hinge effect, the water retaining panel can move within a certain range. When it is necessary to discharge flood water, it can be folded and laid flat on the bottom plate. When it is necessary to retain water, it can be restored to a prism. Furthermore, in order to strengthen the bending stiffness of the water retaining panel, reinforcing ribs are arranged on the outside of the water retaining panel perpendicular to the axial direction of the dam.

[0014] The hinge system is divided into an upper hinge, a middle hinge and a lower hinge. The upper hinge is used to connect the upstream upper panel and the downstream upper panel. The middle hinge is used to connect the upstream upper panel and the upstream lower panel, the downstream upper panel and the downstream lower panel. The lower hinge is used to connect the upstream lower panel and the bottom plate, the downstream lower panel and the bottom plate. In order to limit the reverse folding of the water retaining panel, a limit baffle is set on the inner upper part of the upstream lower panel and the downstream lower panel. In order to prevent external water from penetrating into the water retaining panel through the hinge system, water stops are set at various hinge systems.

[0015] The rubber dam bag is located on the inner side of the water retaining panel, and is divided into an upstream dam bag and a downstream dam bag, which are arranged symmetrically. The material of the rubber dam bag is a multi-layer adhesive tape with rubber layers inside and outside and fiber woven fabric in the middle. One end of the dam bag adhesive tape is anchored to the water retaining panel, and the other end is anchored to the bottom plate. It is inflated by filling air or water into the inside to prop up the water retaining panel to block water; or it is deflated by discharging air or water to the outside to lay down or fold the water retaining panel to discharge flood water. The upstream dam bag and the downstream dam bag cooperate to inflate or deflate to jointly control the water retaining panel to be propped up or laid down. The two ends of the rubber dam bag are fan-shaped dam heads, and the two radius edges of the fan-shaped dam head are anchored to the upstream lower side panel, the downstream lower side panel, and the bottom plate, and the arc edge of the fan-shaped dam head is not anchored. In order to prevent water from entering the prism and affecting the control and adjustment of the water retaining panel, triangular waterproof adhesive tapes are set at both ends of the prism and anchored to the double-sided water retaining panels and the bottom plate.

[0016] The bottom plate is the foundation of the bidirectional sluice dam project and is constructed of concrete, reinforced concrete and stone masonry.

[0017] The pier walls are located at both ends of the water retaining panel and the rubber dam bag, and the pier walls and the water retaining panel jointly retain water.

[0018] The energy dissipation and anti-scouring system is located downstream of the bottom plate and is used for dissipating energy of water flowing over the dam and preventing scouring.

[0019] The control system is a system for filling and draining the rubber dam bag, or filling and exhausting, so as to control the water retaining and leveling of the bidirectional water retaining dam project, and is generally arranged on the bank outside the river channel. It mainly includes power distribution facilities, monitoring facilities, power facilities, filling and draining or filling and exhausting pipelines, control facilities, and safety insurance facilities. The power distribution facilities are power supply and power distribution facilities. The monitoring facilities are various video monitoring, sensors, etc., which are used to monitor the river water level, tide level, dam height, and internal pressure of the rubber dam bag. The power facilities are water pumps or air compressors. The filling and draining or filling and exhausting pipelines are pipelines for conveying or discharging water or gas for the rubber dam bag. The control facilities are automatic control cabinets. The safety insurance facilities are overpressure alarms, overpressure overflow pipes or pressure reducing valves to prevent the rubber dam bag from being damaged due to excessive internal pressure after overcharging.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] (1) The two-way water retaining sluice dam project can retain water in both directions, not only store river water, but also discharge flood in the river course. At the same time, it can also block the sea tide and prevent seawater intrusion.

[0022] (2) The water retaining panel can protect the rubber dam bag and extend its service life, allowing ice floes and sharp floating objects to pass over the dam safely.

[0023] (3) The water retaining panels of the two-way water retaining sluice dam project and between them and the bottom slab are connected by hinges, and the internal rubber dam bag support serves as a buffer, with strong toughness. It will not cause system failure and loss of normal operation ability due to foundation deformation, and has stronger resistance to sea waves, earthquakes, typhoons, impacts of sand and gravel and large floating objects. It can be widely used in coastal tide protection, strong earthquake areas, and treatment of mountain flood river courses.

[0024] (4) The outside of the two-way water retaining sluice dam project is a closed prism surrounded by water retaining panels. It is not easy to generate siltation under the dam, and there will be no phenomenon of siltation at the downstream anchorage end of the rubber dam causing wear of the dam bag, nor will there be a phenomenon of siltation on the downstream side of the flap gate or pneumatic shield dam causing jamming of the opening and closing.

[0025] (5) The two-way water retaining sluice dam project can build a sluice dam with a height exceeding 5 meters, which can achieve water retaining at high water levels and is suitable for tide protection and power generation.

[0026] (6) The two-way water retaining sluice dam project is not restricted by the single-span span and can build large-span sluice dams.

[0027] (7) When the two-way water retaining sluice dam project retains water and overflows, there will be no vibration and flapping, avoiding tearing and dam breakage due to vibration wear.

[0028] (8) The two-way water retaining sluice dam project has a fast speed of raising and lowering the sluice dam, is flexible and can adjust the opening height arbitrarily according to the project needs, facilitating the control of water level and flow rate.

[0029] (9) When the water levels of the upstream and downstream of the two-way water retaining sluice dam project are both high, it will not be unable to collapse flat due to the buoyancy effect and does not affect flood discharge. When it collapses flat, it completely adheres to the bottom slab, does not block water, and is conducive to flood passage.

[0030] (10) Compared with the rubber dam and pneumatic shield dam, the two-way water retaining sluice dam project has a shorter perimeter of the dam bag, which can save the amount of dam bag adhesive tape used.

[0031] (11) The structure of the two-way water retaining sluice dam project is reasonably stressed, not easy to generate stress concentration, can give full play to the mechanical properties and advantages of rigid materials and flexible materials, the opening and closing equipment has a simple structure, low construction difficulty, small investment, and is convenient for operation, maintenance and management, so as to achieve the purpose of saving investment and improving project benefits. Description of the Drawings

[0032] Figure 1 It is the front water retaining profile view of the designed dam height for the two-way water retaining sluice dam project;

[0033] Figure 2 It is the front elevation view of the two-way water retaining sluice dam project;

[0034] Figure 3 It is the reverse water retaining profile view of the designed dam height for the two-way water retaining sluice dam project;

[0035] Figure 4 It is the upper hinge profile view;

[0036] Figure 5 It is the middle hinge profile view;

[0037] Figure 6 It is the lower hinge profile view;

[0038] Figure 7 It is the front water retaining profile view of the relatively lower dam height for the two-way water retaining sluice dam project;

[0039] Figure 8 It is the discharge profile view of the two-way water retaining sluice dam project;

[0040] Figure 9 It is the inverted horizontal discharge profile view of the two-way water retaining sluice dam project;

[0041] Figure 10 It is the reverse water intake profile view of the two-way water retaining sluice dam project.

[0042] In the figure: 1 - water retaining panel; 2 - hinge system; 3 - rubber dam bag; 4 - bottom slab; 5 - pier wall; 6 - energy dissipation and erosion prevention system; 7 - control system; 8 - upper upstream panel; 9 - lower upstream panel; 10 - upper downstream panel; 11 - lower downstream panel; 12 - upper hinge; 13 - middle hinge; 14 - lower hinge; 15 - upstream side dam bag; 16 - downstream side dam bag; 17 - limit baffle; 18 - fan-shaped dam head; 19 - waterproof adhesive tape; 20 - safety insurance facility; 21 - stiffening rib. Specific implementation manners

[0043] The present utility model provides a two-way water retaining sluice dam project. It is applicable to be constructed at the estuary position and used as a drainage sluice or a tide-blocking sluice for the project of blocking sea tides and discharging river floods. Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0044] The bidirectional water retaining dam project is composed of a water retaining panel 1, an articulated system 2, a rubber dam bag 3, a bottom plate 4, a pier wall 5, an energy dissipation and anti-scouring system 6, and a control system 7. It is characterized in that a bottom plate 4 is constructed at the estuary of the river, the water retaining panel 1 is on the upper side of the bottom plate 4, the bottom plate 4 and the water retaining panel 1 and the water retaining panel 1 are connected by an articulated system 2, pier walls 5 are at both ends of the water retaining panel 1 and the rubber dam bag 3, the energy dissipation and anti-scouring system 6 is on the downstream side of the bottom plate 4, and the control system 7 is on the outer bank of the river channel, and the control system 7 is connected to the rubber dam bag 3 through a pipeline. Figure 1 , 2 , as shown in Figure 3.

[0045] The bidirectional water retaining dam project is characterized in that the outer side of the dam is surrounded by a water retaining panel 1, the water retaining panels 1 and the water retaining panel 1 and the bottom plate 4 are connected by hinges, the rubber dam bag 3 is located on the inner side of the water retaining panel, one end of the dam bag tape is connected to the water retaining panel 1, and the other end is connected to the bottom plate 4, the water retaining panel 1 can protect the rubber dam bag 3 and extend its service life, and can allow ice and sharp floating objects to pass through, and the rise and fall of the water retaining panel 1 is controlled by controlling the volume of the medium filled in the rubber dam bag 3.

[0046] The material of the water retaining panel 1 can be metal or other high-strength materials. The water retaining panel 1 has a total of 4 pieces, namely the upstream upper panel 8, the upstream lower panel 9, the downstream upper panel 10, and the downstream lower panel 11. The upstream upper panel 8 and the upstream lower panel 9, the upstream upper panel 8 and the downstream upper panel 10, the downstream upper panel 10 and the downstream lower panel 11, the upstream lower panel 9 and the bottom plate 4, and the downstream lower panel 11 and the bottom plate 4 are all connected by a hinge system 2 to form a closed prism. Due to the hinge effect, the water retaining panel 1 can move within a certain range. When it is necessary to discharge flood water, it can be folded and laid flat on the bottom plate. When it is necessary to retain water, it can be restored to a prism. Further, in order to strengthen the bending stiffness of the water retaining panel 1, a reinforcing rib 21 is arranged on the outer side of the water retaining panel 1 perpendicular to the axial direction of the dam.

[0047] The hinge system 2 is divided into an upper hinge 12, a middle hinge 13 and a lower hinge 14. Figure 4 , 5 , 6. The upper hinge 12 is used to connect the upstream upper panel 8 and the downstream upper panel 10, the middle hinge 13 is used to connect the upstream upper panel 8 and the upstream lower panel 9, the downstream upper panel 10 and the downstream lower panel 11, and the lower hinge 14 is used to connect the upstream lower panel 9 and the bottom plate 4, the downstream lower panel 11 and the bottom plate 4. In order to limit the reverse folding of the water retaining panel, a limit baffle 17 is set on the upper inner side of the upstream lower panel 9 and the downstream lower panel 11. In order to prevent external water from penetrating into the water retaining panel 1 through the hinge system 2, water stops are set at various locations of the hinge system 2.

[0048] The rubber dam bag 3 is located inside the water retaining panel 1 and is divided into an upstream dam bag 15 and a downstream dam bag 16, which are symmetrically arranged. The material of the rubber dam bag 3 is a multi-layer adhesive cloth with a rubber layer on the inside and outside and a fiber woven cloth pressed in the middle. One end of the dam bag adhesive cloth is anchored to the water retaining panel 1, and the other end is anchored to the bottom plate 4. It is inflated by filling air or water into it, and the water retaining panel 1 is propped up to retain water; or the air or water is discharged outward to deflate it, and the water retaining panel 1 is laid down and folded to discharge flood. The upstream dam bag 15 and the downstream dam bag 16 need to be inflated or deflated cooperatively to jointly control the propping up or laying down of the water retaining panel 1. The two end parts of the rubber dam bag 3 are fan-shaped dam heads 18. The two radius sides of the fan-shaped dam head 18 are anchored to the upstream lower side panel 9, the downstream lower side panel 11, and the bottom plate 4, and the arc side of the fan-shaped dam head 18 is not anchored. In order to prevent water from entering the prism and affecting the control and adjustment of the water retaining panel 1, triangular waterproof adhesive cloths 19 are arranged at both ends of the prism and are anchored together with the double-sided water retaining panel 1 and the bottom plate 4.

[0049] The bottom plate 4 is the foundation of the two-way water retaining sluice dam project and is built with concrete, reinforced concrete, or masonry.

[0050] The pier walls 5 are at both ends of the water retaining panel 1 and the rubber dam bag 3, and the pier walls 5 and the water retaining panel 1 jointly retain water.

[0051] The energy dissipation and scour prevention system 6 is located downstream of the bottom plate 4 and is used for energy dissipation of the water flow passing over the dam and preventing scour.

[0052] The control system 7 is a system that fills or drains water or fills or exhausts air for the rubber dam bag 3, thereby controlling the water retaining and laying flat of the two-way water retaining sluice dam project, and is generally arranged on the outer bank of the river channel. It mainly includes power distribution facilities, monitoring facilities, power facilities, filling and draining water or filling and exhausting air pipelines, control facilities, and safety insurance facilities 20. The power distribution facilities are power supply and power transformation and distribution facilities. The monitoring facilities are various video monitors, sensors, etc., which are used to monitor the river water level, tide level, sluice dam height, and the internal pressure of the rubber dam bag. The power facilities are water pumps or air compressors. The filling and draining water or filling and exhausting air pipelines are pipelines for conveying or discharging water or air for the rubber dam bag. The control facilities are automatic control cabinets. The safety insurance facilities 20 are overpressure alarms, overpressure overflow pipes, or pressure reducing valves to prevent the internal pressure of the rubber dam bag from being too large and damaged after overfilling.

[0053] As Figure 1 、 2 、3、7、8、9 shown, the specific operation procedure of the two-way water retaining sluice dam project is as follows.

[0054] When the sluice dam needs to be laid flat for flood discharge, first discharge some air or water from the downstream dam bag 16 to make it deflated. Wait until the downstream water retaining panel folds slightly inward, then discharge some air or water from the upstream dam bag 15 to make it deflated. Continue to discharge the air or water in the downstream dam bag 16 and the upstream dam bag 15 until the water retaining panel 1 is laid down and folded as Figure 9 shown. During the process of discharging the air or water in the dam bag, it is necessary to ensure that the air volume or water volume in the upstream dam bag 15 is always larger than that in the downstream dam bag 16, and the pressure in the dam bag is relatively balanced.

[0055] When the dam needs to be erected to retain water, first slightly inflate the upstream dam bag 15. After the upstream water retaining panel is slightly lifted, then inflate the downstream dam bag 16. Continue to fill the downstream dam bag 16 and the upstream dam bag 15 with air or water until the water retaining panel unfolds and stands upright as Figure 1 、 2 、shown in Figure 3. During the process of filling the dam bag with air or water, it is necessary to ensure that the air volume or water volume in the upstream dam bag 15 is always larger than that in the downstream dam bag 16, and the pressure in the dam bag is relatively balanced.

[0056] When the two-way water retaining sluice dam project is used for tide blocking and flood discharge with the change of tide level, there is no difference from the operation procedure of general tide blocking sluice dams. It is necessary to adjust the height of the sluice dam with the change of tide level for tide blocking or flood discharge.

[0057] The two-way water retaining sluice dam project can not only retain water in two directions, but also control the flow rate in two directions. When it is necessary to divert water from downstream to upstream, it can be adjusted to the Figure 10 shown style for reverse water diversion.

[0058] The present invention will be further described below in conjunction with Embodiments 1-2.

[0059] Embodiment 1: If the inflation medium in the rubber dam bag 3 of the two-way water retaining sluice dam project is water, then the power facility of the control system 7 is a water pump, and the rubber dam bag 3 is controlled for inflation and drainage through the inflation and drainage pipeline. The safety insurance facility 20 is an overpressure alarm and an overpressure overflow pipe.

[0060] Embodiment 2: If the inflation medium in the rubber dam bag 3 of the two-way water retaining sluice dam project is air, then the power facility of the control system 7 is an air compressor, and the rubber dam bag 3 is controlled for inflation and exhaust through the inflation and exhaust pipeline. The safety insurance facility 20 is an overpressure alarm and a pressure reducing valve.

[0061] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A bidirectional water retaining dam project, characterized in that: The outside of the dam is surrounded by a water retaining panel, which is connected to each other and to the bottom plate by a hinge system. The rubber dam bag is located on the inside of the water retaining panel. One end of the dam bag tape is connected to the water retaining panel, and the other end is connected to the bottom plate. The water retaining panel can protect the rubber dam bag and extend its service life. It can allow ice and sharp floating objects to pass through. The rise and fall of the water retaining panel is controlled by controlling the volume of the medium filled in the rubber dam bag.

2. A bidirectional water retaining dam project according to claim 1, characterized in that: It consists of a water retaining panel, an articulated system, a rubber dam bag, a base plate, a pier wall, an energy dissipation and anti-impact system, and a control system.

3. A bidirectional dam project according to claim 1, characterized in that: There are four water retaining panels in total, namely the upstream upper panel, the upstream lower panel, the downstream upper panel, and the downstream lower panel. The upstream upper panel and the upstream lower panel, the upstream upper panel and the downstream upper panel, the downstream upper panel and the downstream lower panel, the upstream lower panel and the bottom plate, and the downstream lower panel and the bottom plate are all connected by a hinge system to form a closed prism. Due to the hinge effect, the water retaining panel can move within a certain range. When it is necessary to discharge flood water, it can be folded and laid flat on the bottom plate. When it is necessary to retain water, it can be restored to a prism.

4. A bidirectional dam project according to claim 1, characterized in that: The hinge system is divided into an upper hinge, a middle hinge and a lower hinge. The upper hinge is used to connect the upstream upper side panel with the downstream upper side panel, the middle hinge is used to connect the upstream upper side panel with the upstream lower side panel, the downstream upper side panel with the downstream lower side panel, and the lower hinge is used to connect the upstream lower side panel with the bottom plate, and the downstream lower side panel with the bottom plate.

5. A bidirectional water retaining dam project according to claim 1, characterized in that: The rubber dam bag is located on the inner side of the water retaining panel and is divided into an upstream dam bag and a downstream dam bag, which are arranged symmetrically. The material of the rubber dam bag is a multi-layer adhesive tape with rubber layers inside and outside and fiber woven cloth in the middle. One end of the dam bag adhesive tape is anchored and connected to the water retaining panel, and the other end is anchored and connected to the bottom plate. It is inflated by filling air or water into the inside to prop up the water retaining panel, or air or water is discharged outward to shrink it, and the water retaining panel is laid down or folded to discharge flood water. The upstream dam bag and the downstream dam bag are inflated or deflated in coordination to jointly control the propping up or laying down of the water retaining panel. The two side ends of the rubber dam bag are fan-shaped dam heads, and the two radius edges of the fan-shaped dam head are anchored to the upstream lower side panel, the downstream lower side panel, and the bottom plate, and the arc edge of the fan-shaped dam head is not anchored. In order to prevent water from entering the prism and affecting the control and adjustment of the water retaining panel, triangular waterproof adhesive tapes are arranged at both ends of the prism to be anchored to the double-sided water retaining panels and the bottom plate.

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