CN217480099U - Movable weir - Google Patents

Abstract

The utility model provides a movable weir, which comprises a movable weir body, wherein the movable weir body comprises a working gate, an opening and closing machine chamber, a floating box type bottom plate, a driving device and a buoyancy and gravity center adjusting mechanism; the hoist chamber and the buoyancy tank type bottom plate are of an integrally prefabricated empty box type structure, the working gate is arranged beside the hoist chamber, and a driving device is arranged in the hoist chamber and can drive the working gate to open and close; the buoyancy and gravity center adjusting mechanism is arranged in the buoyancy tank type bottom plate and can adjust the buoyancy and the gravity center of the movable weir body. The utility model discloses an above structural design makes and removes the overall structure scheme that the weir can adopt prefabricated, the scene is taken one's place outdoors, realizes building the dam fast, the purpose of taking one's place the use to, not need not the cofferdam in removing the weir construction period, the river course is not cut off, is navigating constantly, not only very big reduction the cost and the construction degree of difficulty, also avoided the influence to flood control, shipping and surrounding environment.

Description

Movable weir

Technical Field

The utility model relates to a hydraulic engineering technical field specifically relates to a remove weir.

Background

The gate is a control facility for closing and opening a drainage (discharging) water channel, is an important component of a hydraulic building, and can be used for intercepting water flow, controlling water level, regulating flow, discharging silt and floating objects and the like. In the prior art, common gates comprise flap gates, rubber dams, bottom shaft type gates, radial gates and other gate types. These types of gates have the following disadvantages in common use:

firstly, foundation pits need to be excavated, cofferdams need to be built, segmental diversion and the like during construction, the field construction workload is large, the temporary engineering cost is high, and the destructive power to the surrounding environment is large; secondly, during the construction of the gate, the river channel needs to be cut off and shut down, which causes serious influence on flood control and shipping; third, the gate is whole to be fixed in a certain concrete position in the river course, can't remove, and this causes the construction difficulty, maintains inconvenient scheduling problem, and in case when the former dam need demolish the condition of rebuilding appear, must pay out great cost and demolish former dam, causes very big economic loss.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a remove weir, should remove the weir construction easily, maintain convenient and cost with low costs, have very high economic benefits.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a movable weir comprises a movable weir body, wherein the movable weir body comprises a working gate, an opening and closing machine chamber, a floating box type bottom plate, a driving device and a buoyancy and gravity center adjusting mechanism;

the hoist chamber and the buoyancy tank type bottom plate are of an integrally prefabricated empty box type structure, the working gate is arranged beside the hoist chamber, and a driving device is arranged in the hoist chamber and can drive the working gate to open and close;

the buoyancy and gravity center adjusting mechanism is arranged in the buoyancy tank type bottom plate and can adjust the buoyancy and the gravity center of the movable weir body.

In the technical scheme, by adopting the structural design, the movable weir can adopt an overall structural scheme of prefabricating outside the field and positioning on the spot. In the work progress, at first utilize the empty van design of headstock gear room and flotation tank formula bottom plate to and buoyancy and focus adjustment mechanism to removing weir body buoyancy and centrobaric regulation, will remove the whole floating transportation of weir body to the appointed place in the river course, then through the buoyancy of buoyancy and focus adjustment mechanism adjustment removal weir body, make it sink, thereby realize quick dam building, the purpose of taking one's place to use, and, above process need not the cofferdam, the river course is not cut off, not disconnected, not navigation, not only very big reduction cost and the construction degree of difficulty, also avoided the influence to flood control, shipping and surrounding environment. In addition, when the movable weir body needs to be maintained or moved, the buoyancy of the movable weir body can be adjusted by the buoyancy and gravity center adjusting mechanism, so that the movable weir body floats upwards integrally, and the operation is very convenient.

Preferably, the buoyancy and gravity center adjusting mechanism comprises a plurality of weight cabins, and weights can be arranged in the weight cabins.

In the technical scheme, through adopting the structural design, when the buoyancy of the movable weir body needs to be adjusted, the operation can be realized only by adjusting the mass of the counterweight in each counterweight cabin, and the operation is very simple and convenient. And, compared with the design of single counter weight cabin, the design of a plurality of counter weight cabins can better adjust and maintain the balance stability of the mobile weir body.

Preferably, the counterweight is counterweight liquid, and the buoyancy and gravity center adjusting mechanism further comprises a liquid amount adjusting device capable of adjusting the volume of the counterweight liquid in each counterweight cabin.

In the technical scheme, through adopting the structural design, when the buoyancy of the movable weir body is required to be adjusted, the operation can be very simple and convenient only by controlling the counter weight liquid volume in each counter weight cabin through the liquid volume adjusting device.

Preferably, the liquid amount adjusting device comprises a liquid pumping device and liquid inlet/outlet pipes, each counterweight chamber is connected with the liquid pumping device through the liquid inlet/outlet pipes one by one, a vent is arranged on each counterweight chamber, and a valve is arranged on each liquid inlet/outlet pipe.

In the technical scheme, by adopting the structural design, when the counterweight liquid needs to be injected into the counterweight cabin, the air vent on the counterweight cabin and the valve on the liquid inlet/outlet pipe are opened, and the liquid pumped by the liquid pumping device enters the counterweight cabin through the liquid inlet/outlet pipe; when liquid in the counterweight cabin needs to be discharged, the air vent on the counterweight cabin and the valve on the liquid inlet/outlet pipe are opened, so that the liquid in the counterweight cabin flows out through the liquid inlet/outlet pipe, and the operation is very convenient.

Preferably, the weight chambers are disposed at the left side, the right side, the front side and the rear side of the floating box type bottom plate.

In this technical scheme, through adopting above structural design, set up a plurality of counter weight cabins in the front portion of flotation tank formula bottom plate, rear portion, left part, right part, the buoyancy of weir body is removed in the adjustment that from this can be very convenient, simultaneously, maintains the overall balance who removes the weir body, makes it more easily by the transportation by water or sink to the appointed place.

Preferably, the counterweight cabin is diagonally arranged in the floating box type bottom plate.

In this technical scheme, through adopting above structural design, set up a plurality of counter weight cabins in the front portion of flotation tank formula bottom plate, rear portion, left part, right part, buoyancy that from this can very convenient adjustment remove the weir body, simultaneously, maintain the overall balance that removes the weir body, make it more easily by the floating transportation or sink to the appointed place.

Preferably, the buoyancy and center of gravity adjustment mechanism further comprises a center of gravity counterweight for moving the weir body center of gravity counterweight.

In the technical scheme, through adopting the structural design, the gravity center of the moving weir body is stabilized at the preset position by utilizing the design of the gravity center counterweight, so that the stability of the moving weir body in the moving process is improved

Preferably, the center of gravity weight is disposed within the weight compartment.

In the technical scheme, the gravity center counterweight is arranged in the counterweight cabin by adopting the structural design, so that the overall structure of the buoyancy and gravity center adjusting mechanism is simpler.

Preferably, the center of gravity weight is formed by casting concrete grout into the weight compartment.

In the technical scheme, through the structural design, the gravity center counterweight is formed by pouring concrete slurry into the counterweight cabin, and the counterweight cabin is simple to manufacture and low in cost.

Preferably, the floating box type bottom plate and/or the hoist chamber are of an empty box type steel plate structure.

In the technical scheme, through adopting the structural design, the floating box type bottom plate and/or the headstock gear chamber are/is made of steel plates, the steel plates have higher strength, can resist low temperature and corrosion, the service life of the movable weir body is prolonged, and the structural stability of the movable weir body is guaranteed.

Preferably, the working gate comprises a gate leaf and a bottom shaft, the gate leaf is arranged on the bottom shaft, the bottom shaft is arranged on the floating box type bottom plate, and the driving device drives the bottom shaft to rotate through a crank arm arranged at the end part of the bottom shaft.

Among this technical scheme, through the structural design more than adopting, will remove the weir design for the steel dam that floats, make from this to remove the weir and can integrate conventional steel dam and landscape dam's whole functions, like adjustable water level, quick flood discharge, integrated waterscape light, fountain performance system etc to satisfy user's different demands.

Preferably, the water-facing side and the backwater side of the floating box type bottom plate are respectively provided with an upstream side steel sheet pile and a downstream side steel sheet pile.

Among this technical scheme, through the structural design more than adopting, the setting of upstream side steel sheet pile and downstream side steel sheet pile can play location and fixed effect to the sunken position of flotation tank formula bottom plate to improve the convenience of removing the weir body installation of taking one's place, and improve the stability of removing the weir body.

Preferably, after the movable weir body is sunk in place, two sides of the movable weir body are fixed and sealed through stabilizing seats.

In the technical scheme, through adopting the structural design, the two sides of the movable weir body are fixed and sealed through the stabilizing seats, and the whole sealing performance and stability of the movable weir can be ensured.

Preferably, the stabilizing base comprises a caisson and a ballast part filled in the caisson.

In the technical scheme, by adopting the structural design, the caisson can adopt the modes of off-site prefabrication and on-site sinking in place for use, and is convenient to operate and low in cost.

Preferably, after the movable weir body is sunk in place, sand bags are filled on two sides of the movable weir body.

In this technical scheme, through the structural design more than adopting, fill the sand bag at removal weir body both sides to in will removing the weir body and be fixed in the river course, thereby ensure to remove holistic leakproofness and the stability of weir, easy and simple to handle and with low costs.

Preferably, after the movable weir body is sunk in place, a plurality of lateral steel sheet piles are arranged on two sides of the movable weir body, and backfill soil is filled in an area enclosed by the lateral steel sheet piles and the river bank.

Among this technical scheme, through the structural design more than adopting, set up the side direction steel sheet pile in removal weir body both sides to utilize the backfill soil to tamp removal weir body both sides space, when guaranteeing to remove the whole leakproofness of weir, improve its stability greatly.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a remove the weir, remove the weir body and can be in mill or the processing place preparation nearby, wholly transport the engineering scene again and install and take one's place, consequently have and can realize building dam fast, dam body advantage such as highly customizable. Meanwhile, in the construction period of the movable weir, foundation pits do not need to be excavated, cofferdams do not need to be built, the river course can be used in place as long as the river course is normal and has water, the on-site construction workload is small, the river course is not disconnected in flow and navigation during construction, and the surrounding environment is not damaged.

2. The utility model provides a remove weir when needs are overhauld, only need control buoyancy and focus adjustment mechanism, the weight that reduces the flotation tank formula bottom plate makes to remove the weir body and floats to the surface of water alright go on, and it is very convenient to operate. And after the movable weir is used for a plurality of years at one place, if the original dam needs to be dismantled and rebuilt or other places have proper working conditions due to urban planning and adjustment, the movable weir body can float upwards and be integrally hauled to a new site to be put in place again, and the multiple purposes of one dam are realized.

3. The utility model provides a remove weir, buoyancy and focus adjustment mechanism not only can adjust the buoyancy of removing the weir body, but also its focus position of steerable ensures from this that to remove the weir body at the transportation by force in-process, sink or come up the balance of in-process and stable.

4. The utility model provides a remove the weir, still can further integrate conventional steel dam and the whole functions of view dam, like adjustable water level, quick flood discharge, integrated waterscape light, fountain performance system etc to satisfy user's different demands.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a front view of a moving weir body in a moving weir according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1, with the working gate in a water retaining state;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1, with the working gate in a discharge state;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a first top view of a moving weir according to an embodiment of the present invention;

fig. 6 is a second top view of the mobile weir according to the embodiment of the present invention.

The figures show that:

100-a moving weir;

20-moving the weir body;

21-a working gate;

22-an opening and closing machine chamber;

23-a pontoon type floor;

24-a drive device;

25-crank arm;

26-gate blade;

27-bottom axis;

28-sandbag;

29-upstream side steel sheet pile;

30-downstream steel sheet piles;

31-lateral steel sheet pile

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Further, all directional indicators in this application (such as up, down, left, right, front, back, bottom …) are only used to explain the relative positional relationship between the components, the motion, etc. at a particular attitude (as shown in the drawings), and if the particular attitude changes, the directional indicator changes accordingly. Further, the descriptions in this application that refer to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated.

The present embodiment provides a mobile weir 100, which is structurally designed as shown in fig. 1 to 6, and comprises a mobile weir body 20, wherein the mobile weir body 20 comprises a working gate 21, an open/close machine chamber 22, a buoyancy chamber type bottom plate 23, a driving device 24, and a buoyancy and gravity center adjusting mechanism.

As shown in fig. 1, the hoist chamber 22 and the buoyancy chamber type bottom plate 23 are integrally prefabricated empty chamber type structures, the hoist chamber 22 is two, the two hoist chambers 22 are respectively disposed above two ends of the buoyancy chamber type bottom plate 23, the working gate 21 is disposed between the two hoist chambers 22, the drive device 24 is disposed in the hoist chamber 22, and the drive device 24 can drive the working gate 21 to open and close. The buoyancy and center of gravity adjusting mechanism is disposed in the buoyancy tank type bottom plate 23, and the buoyancy and center of gravity adjusting mechanism can adjust the buoyancy and center of gravity of the movable weir body 20.

The above structural design enables the mobile weir provided by the present embodiment to adopt an overall structural scheme of prefabricating outside the field and positioning in the field. In the construction process, firstly, the empty box type design of the headstock gear chamber 22 and the floating box type bottom plate 23 is utilized, and the buoyancy and gravity center adjusting mechanism adjusts the buoyancy and gravity center of the movable weir body 20, the movable weir body 20 is wholly floated to a specified place in a river channel, then the buoyancy of the movable weir body 20 is adjusted through the buoyancy and gravity center adjusting mechanism to sink, so that the purposes of fast building a dam and in-place use are achieved, in addition, the cofferdam is not needed in the above process, the river channel is not cut off and is not in navigation, the manufacturing cost and the construction difficulty are greatly reduced, and the influence on flood control, shipping and the surrounding environment is also avoided. In addition, when the movable weir body 20 needs to be maintained or moved, the buoyancy of the movable weir body 20 can be adjusted by using the buoyancy and gravity center adjusting mechanism, so that the movable weir body is floated integrally, and the operation is very convenient.

As for the design of the working gate 21, as shown in fig. 2 to 4, the working gate 21 includes a gate leaf 26 and a bottom shaft 27, the bottom shaft 27 is mounted on the float chamber type bottom plate 23, and the driving device 24 in the hoist chamber 22 drives the bottom shaft 27 to rotate through a crank arm 25 provided at an end of the bottom shaft 27, thereby opening and closing the working gate 21. Further, as shown in fig. 4, in the present embodiment, the driving device 24 is a hydraulic cylinder, and a piston rod of the hydraulic cylinder extends to be connected to the crank arm 25, whereby the gate flap 26 is turned up and down by the telescopic action of the piston rod.

Further, as for the design of the buoyancy and gravity center adjusting mechanism, the buoyancy and gravity center adjusting mechanism comprises a plurality of weight chambers, and weight objects can be arranged in the weight chambers, and the weight objects can be weight liquid or other weight materials. As for the number of the weight compartments, the number of the weight compartments may be designed to be 4, and the 4 weight compartments are distributed at the front, rear, left, and right portions of the buoyant box-type floor 23. Or, the number of the counterweight cabins is designed to be 2, and the 2 counterweight cabins are diagonally distributed in the floating box type bottom plate 23, so that the movable weir body 20 can be ensured to be stable and balanced after counterweight objects are loaded into the counterweight cabins.

Under the condition that the counterweight is counterweight liquid, the buoyancy and gravity center adjusting mechanism further comprises a liquid amount adjusting device, and the liquid amount adjusting device can adjust the volume of the counterweight liquid in each counterweight cabin. The liquid quantity adjusting device comprises a liquid pumping device and liquid inlet/outlet pipes, each balance weight cabin is connected with the liquid pumping device through the liquid inlet/outlet pipes one by one, air vents are arranged on the balance weight cabins, and valves are arranged on the liquid inlet/outlet pipes. The structural design ensures that when the buoyancy of the movable weir body 20 needs to be adjusted, the buoyancy can be realized only by controlling the counterweight liquid volume in each counterweight chamber through the liquid volume adjusting device, specifically, when the weight of the movable weir body 20 needs to be increased to enable the movable weir body to sink, a valve arranged on the liquid inlet/outlet pipe is opened, so that the liquid pumped by the liquid pumping device enters each counterweight chamber through the liquid inlet/outlet pipe, meanwhile, a vent arranged on the counterweight chamber is opened to vent air, so that the air in the counterweight chamber is discharged outwards, the weight of the floating box type bottom plate 23 is increased, and the movable weir body 20 gradually sinks; and when the weight of the movable weir body 20 is lightened to enable the movable weir body to float upwards, the valve arranged on the liquid inlet/outlet pipe is opened, so that liquid is discharged through the liquid inlet/outlet pipe, meanwhile, the air inlet is opened through the air vent arranged on the counterweight cabin, so that the counterweight cabin is gradually filled with air, and therefore the movable weir body 20 can float upwards gradually, and the operation is very convenient.

In addition, during the floating or sinking process of the movable weir body 20, the user can properly adjust the gravity center of the movable weir body 20 according to the overall condition of the movable weir body 20 so as to keep it in a stable state of equilibrium. Specifically, if the user finds that the movable weir body 20 is inclined to the left during the sinking process, which means that the center of gravity of the movable weir body is deviated to the left, the liquid amount adjusting device can be controlled to inject more counterweight liquid into the counterweight chamber at the right of the floating box type bottom plate 23.

Further, the movable weir body 20 is subjected to not only upward buoyancy but also impact force generated by the flow of water during the floating transportation in the river. The floating stability of the mobile weir body 20 is greatly related to the position of the center of gravity, and if the center of gravity is not on the longitudinal axis of the mobile weir body 20, the mobile weir body 20 may be unstable during floating, and even the mobile weir body 20 may overturn, which may result in economic loss and endanger the life safety of constructors. Accordingly, the buoyancy and center of gravity adjustment mechanism further includes a center of gravity weight for moving the center of gravity of weir body 20, which may be formed by pouring concrete slurry into the weight compartment. If the weight of the mobile weir body 20 is to be moved out of the vessel, a predetermined weight of concrete grout can be poured into the weight chamber through the liquid amount control device, and the concrete grout should be poured toward the middle of the pontoon bottom plate 23 so as to be solidified to form a weight for balancing the weight of the mobile weir body 20, in order to stabilize the center of gravity of the mobile weir body 23 on the vertical axis.

In the construction process of the mobile weir 100 provided by this embodiment, the size of the mobile weir 100 is determined by calculating the width of the river, the hoist chamber 22, the buoyancy tank type bottom plate 23, the working gate 21 and the like are manufactured in a factory or a nearby processing site, and then the whole is transported to a construction site for installation. After reinforcing and water stopping measures are taken, the movable weir body 20 is integrally transported and placed, the high tide level is selected during transportation, ship equipment and personnel are in place in advance, and the integral placement is ensured under the tide level meeting the placement conditions.

When the movable weir body 20 enters the field, the movable weir body 20 is manually pulled to a construction site on the water surface by tools such as ships, and after the tools are put in place, counterweight liquid is injected into each counterweight cabin, so that the movable weir body 20 sinks integrally. After the movable weir body 20 is in place, the two ends of the movable weir body can be blocked and stopped by adopting a conventional method, as shown in fig. 5, the sealing performance of water retaining of the movable weir can be realized by adopting a sand bag 28 filling mode, or as shown in fig. 6, lateral steel sheet piles 31 are arranged on the two sides of the movable weir body 20, and gaps on the two sides of the movable weir body 20 are tamped by using backfilled soil, so that the whole sealing performance of the movable weir is ensured, and the stability of the movable weir is greatly improved. Of course, the user can also fix the movable weir body 20 in the river channel by using a stable seat made of a structure such as a caisson, a ballast filled in the caisson, and the like.

In addition, in view of the fact that the movable weir body 20 is transported at high tide level, the movable weir body 20 will face a large water impact force during the sinking process, and in order to ensure that the movable weir body 20 can be sunk to the preset position, as shown in fig. 5, an upstream side steel sheet pile 29 and a downstream side steel sheet pile 30 are respectively arranged on the upstream side and the downstream side of the floating box type bottom plate 23, and the upstream side steel sheet pile 29 and the downstream side steel sheet pile 30 can play a role in positioning and fixing the sinking position of the floating box type bottom plate 23, so as to improve the convenience of the in-place installation of the movable weir body 20 and improve the stability of the movable weir 100.

When the movable weir 100 needs to be maintained or moved, the floating box type bottom plate 23 can be lifted by external equipment such as a small hook machine through the lifting lugs arranged on the floating box type bottom plate 23, so that the counterweight liquid of each counterweight chamber in the floating box type bottom plate 23 flows out from the liquid inlet/outlet pipe, after the counterweight liquid is discharged, each valve is closed, the movable weir body 20 is put down, and the movable weir body 20 floats on the water surface; or, the weight liquid in the weight chambers can be pumped outwards by a liquid pumping device such as a water pump, and meanwhile, the air inlets preset on each weight chamber are opened to allow air to enter, so that the weight chambers are gradually filled with air, and the movable weir body 20 gradually floats upwards. After the movable weir body 20 floats upwards, the movable weir body can be moved or overhauled.

The embodiments of the present invention have been described, and various changes and modifications can be made by workers without departing from the technical spirit of the present invention.

Claims (16)

1. The movable weir is characterized by comprising a movable weir body (20), wherein the movable weir body (20) comprises a working gate (21), an opening and closing machine chamber (22), a buoyancy tank type bottom plate (23), a driving device (24) and a buoyancy and gravity center adjusting mechanism;

the hoist chamber (22) and the floating box type bottom plate (23) are of an integrally prefabricated empty box type structure, the working gate (21) is arranged beside the hoist chamber (22), a driving device (24) is arranged in the hoist chamber (22), and the driving device (24) can drive the working gate (21) to open and close;

the buoyancy and gravity center adjusting mechanism is arranged in the buoyancy tank type bottom plate (23), and can adjust the buoyancy and gravity center of the movable weir body (20).

2. The mobile weir of claim 1, wherein the buoyancy and center of gravity adjustment mechanism comprises a plurality of weight compartments in which weights may be disposed.

3. The mobile weir of claim 2, wherein the counterweight is a ballast fluid, and the buoyancy and center of gravity adjustment mechanism further comprises a fluid volume adjustment device capable of adjusting the volume of ballast fluid in each counterweight chamber.

4. The moving weir of claim 3, wherein the fluid volume regulating device comprises a pumping device and fluid inlet/outlet pipes, each weight chamber is connected to the pumping device through the fluid inlet/outlet pipe, the weight chamber is provided with a vent, and the fluid inlet/outlet pipe is provided with a valve.

5. The mobile weir of claim 2, wherein the ballast compartments are disposed on the left, right, front and rear sides of the pontoon floor (23).

6. The mobile weir of claim 2 wherein the ballast compartment is diagonally disposed within the pontoon floor (23).

7. The mobile weir of claim 2, wherein the buoyancy and center of gravity adjustment mechanism further comprises a center of gravity weight that weights the center of gravity of the mobile weir body (20).

8. The mobile weir of claim 7, wherein the center of gravity weight is disposed within a weight capsule.

9. The mobile weir of claim 8, wherein the center of gravity weight is formed by pouring concrete slurry into the weight capsule.

10. A mobile weir according to claim 1, characterised in that the pontoon floor (23) and/or the hoist chamber (22) are of empty box steel plate construction.

11. The mobile weir of claim 1, wherein the working gate (21) comprises a gate blade (26) and a bottom shaft (27), the gate blade (26) is disposed on the bottom shaft (27), the bottom shaft (27) is disposed on the pontoon type bottom plate (23), and the driving unit (24) drives the bottom shaft (27) to rotate via a crank arm (25) disposed at an end of the bottom shaft (27).

12. The mobile weir of claim 1, wherein the water-facing side and the water-backing side of the pontoon-type bottom plate (23) are provided with an upstream-side steel sheet pile (29) and a downstream-side steel sheet pile (30), respectively.

13. The mobile weir of claim 1, wherein the sides of the mobile weir body (20) are secured and sealed by stabilizing seats after the mobile weir body (20) is lowered into position.

14. The mobile weir of claim 13, wherein the stabilizing base comprises a caisson and a ballast filled in the caisson.

15. The mobile weir of claim 1, wherein the sides of the mobile weir body (20) are filled with sandbags (28) after the mobile weir body (20) is lowered into position.

16. The mobile weir of claim 1, wherein after the mobile weir body (20) is sunk in place, a plurality of lateral steel sheet piles (31) are arranged on two sides of the mobile weir body (20), and the area enclosed by the lateral steel sheet piles (31) and the river bank is filled with backfill soil.

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