Light telescopic anti-collision and anti-wave cofferdam for inland waterway construction

Abstract

The invention relates to a light telescopic anti-collision and anti-wave cofferdam for inland waterway construction. The light telescopic anti-collision and anti-wave cofferdam comprises an anti-collision system and a cofferdam body. The anti-collision system comprises anti-collision columns, vertical supports and connecting pieces, the upper portions of the vertical supports are connected with the upper portions of the corresponding anti-collision columns through first connecting pieces, the adjacent anti-collision columns are connected through second connecting pieces, the adjacent vertical supports are connected through third connecting pieces, and stable anti-collision lattice units are formed. The cofferdam body is formed by connecting a plurality of cofferdam units, and each cofferdam unit comprises a panel and a transverse support which are arranged from the upstream face to the downstream face. The vertical supports are tightly attached to the downstream face of the cofferdam body. The panel comprises an outer side plate and a middle inserting plate arranged in the outer side plate, and the middle inserting plate can move up and down in the vertical direction relative to the outer side plate. The anti-collision, supporting and stabilizing effects of the single-layer light cofferdam can be improved, the height of the cofferdam can be flexibly adjusted, meanwhile, clay does not need to be filled in the middle, and the cofferdam is detachable and more economical and environmentally friendly.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of inland waterway engineering, specifically a lightweight retractable anti-collision and wave-breaking cofferdam for inland waterway construction. Background Art

[0002] A cofferdam refers to a temporary retaining structure built during the construction of water conservancy or waterway projects to create dry land conditions for the construction of permanent hydraulic structures. The cofferdam is generally dismantled after the permanent structure is completed.

[0003] However, practice has shown that, unlike water conservancy projects in general rivers, when constructing in inland navigable waterways, the cofferdams must not only consider the impact of the construction water level, but also block the impact of ship waves as high as 0.5-1.2m, and prevent collision and damage from passing ships. Therefore, the conventional practice in the past was to "make the main structure of the cofferdam higher and bigger" and the anti-collision facilities at one time, that is, to use a curtain double-row steel pipe pile or steel sheet pile cofferdam with a clay layer in the middle, and then set up anti-collision facilities separately on the outside. This set of independently set anti-collision facilities and the powerful double-layer cofferdam main structure can achieve multiple functions such as water blocking, wave prevention and anti-collision to ensure construction safety. Obviously, this traditional "bulky" cofferdam structure increases the material consumption and has low construction efficiency. At the same time, it isolates the structural connection between the anti-collision facilities and the cofferdam, and has the disadvantages of being environmentally unfriendly and uneconomical. Summary of the invention

[0004] In order to solve the problems that cofferdams are uneconomical, environmentally unfriendly, bulky and heavy in the construction of high-grade inland waterways, the present invention provides a light and retractable anti-collision and anti-wave cofferdam for inland waterway construction.

[0005] Compared with the prior art, the invention has the advantages of being economical, environmentally friendly and highly safe.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A light and retractable anti-collision and wave-breaking cofferdam for inland waterway construction comprises an anti-collision system and a cofferdam body, wherein the cofferdam body and the anti-collision system are arranged in parallel; the anti-collision system comprises anti-collision columns and vertical supports which are arranged at intervals and vertically from the water-facing side to the water-receiving side, wherein the anti-collision columns and the vertical supports are arranged correspondingly in number and position, the upper part of the vertical support is connected to the upper part of the corresponding anti-collision column by a connecting piece 1, the adjacent anti-collision columns are connected by a connecting piece 2, and the adjacent vertical supports are connected by a connecting piece 3, so as to form a stable anti-collision lattice unit; the cofferdam body is formed by connecting a plurality of cofferdam units, each of which comprises a panel arranged from the water-facing side to the water-receiving side, and a transverse support, and the panel is arranged on the water-receiving side of the anti-collision column; the vertical support is arranged in close contact with the water-receiving side of the cofferdam body; the panel comprises an outer plate and an intermediate plug plate arranged in the outer plate, and the intermediate plug plate can move up and down in the vertical direction relative to the outer plate.

[0008] Furthermore, as a preferred technical solution, the horizontal support and the vertical support are both made of aluminum alloy, the panel is made of high-strength honeycomb aluminum alloy, and the connector one, connector two, and connector three are all made of aluminum alloy.

[0009] Furthermore, as a preferred technical solution, the number of lateral supports in each cofferdam unit is 3-5, and the number of vertical supports attached to the back water surface of each cofferdam unit is 1-2.

[0010] Furthermore, as a preferred technical solution, two adjacent cofferdam units are spliced ​​together by inserting two adjacent panels into the left and right grooves of the same aluminum alloy H-profile; the two ends of the lateral support are respectively connected to the back water surfaces of the two adjacent aluminum alloy H-profiles.

[0011] Furthermore, as a preferred technical solution, the connection method is that a protruding component is welded on the outer side of the back water surface of the aluminum alloy H-profile, and a plurality of holes 1 are arranged on the protruding component along the plane direction, and a plurality of holes 2 are also arranged at both ends of the lateral support along the plane direction. Hole 1 and hole 2 correspond to each other in number and position, and the lateral support and the aluminum alloy H-profile are fixed by inserting a wedge-shaped pin into hole 1 and hole 2 at the same time.

[0012] Furthermore, as a preferred technical solution, a sealing plate is provided on a side of the lateral support close to the panel.

[0013] Furthermore, as a preferred technical solution, a damping rubber strip is arranged between the outer plate and the middle plug plate, and the damping rubber strip is adhered to the outer plate. Several groups of spring clips are arranged on both ends of the middle plug plate so that the middle plug plate can be fixed in the required position when it is displaced in the vertical direction in the outer plate.

[0014] Furthermore, as a preferred technical solution, a water-stopping rubber airbag is arranged between the ends of the aluminum alloy H-profile and the panel, and a water-stopping rubber strip is pasted at the places where the aluminum alloy H-profile is attached to the panel.

[0015] Furthermore, as a preferred technical solution, a solar strobe light is provided at the upper end of the anti-collision column.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] (1) The panel of the present invention includes an outer panel and a middle plug plate arranged in the outer panel. The middle plug plate can move up and down in the vertical direction relative to the outer panel to realize the retractable panel, so that the overall structural height of the cofferdam can be flexibly adjusted according to the water level changes, which is well adapted to the influence of the waves of the ship in the channel or the extreme weather, and the height and safety of the cofferdam are increased without increasing the cost.

[0018] (2) The present invention is composed of a plurality of cofferdam units spliced ​​together through the cofferdam body. Preferably, two adjacent panels can be inserted into the left and right grooves of the same aluminum alloy H-profile. All components are made of aluminum alloy. Most of the components weigh less than 20 kg and can be carried and assembled quickly by hand. This cofferdam unit splicing structure can be easily installed and dismantled on site, making the construction convenient and "small, fast and flexible", and improving the construction efficiency. There is no need to fill clay in the middle, no slag is generated, and no water pollution is caused. These materials can be reused after dismantling, which is light and environmentally friendly.

[0019] (3) The anti-collision system of the present invention adopts a lattice structure, has a good anti-collision effect, and is separated from the cofferdam body. The anti-collision system can prevent ships from colliding with the cofferdam body itself, which largely avoids the safety risks of passing ships colliding with the cofferdam and the risk of collapse after the collision. At the same time, the present invention sets a solar flashing light on the upper end of the anti-collision column instead of installing a flashing light on the traditional cofferdam body, which can warn passing ships to avoid it and allow ships to have a certain amount of room for maneuver and reaction, which is safer for the cofferdam body.

[0020] (4) The upper part of the vertical support of the present invention is connected to the upper part of the corresponding anti-collision column by a connecting piece, and the two adjacent anti-collision columns and the two adjacent vertical supports are connected by connecting pieces, so that the two adjacent vertical supports and the corresponding two adjacent anti-collision columns form a stable frame structure, which is firm and reliable. During the construction process, part of the force of the cofferdam body collapsing inward due to water pressure will be transmitted to the anti-collision column through the vertical support that is closely fitted with the lateral support through the tension connecting piece, and then shared by the anti-collision column and the cofferdam main structure. In this way, the safety margin factor of the single-layer cofferdam is higher. When a ship scrapes against the cofferdam, the anti-collision column will first block the ship, which generally does not affect the overall safety of the cofferdam. Even if the anti-collision system is greatly deformed, the anti-collision column drives the vertical support to move backward as a whole, and the vertical support and the cofferdam lateral support are tightly fitted (not rigidly connected) and separated instantly, releasing part of the safety margin of the cofferdam body. The cofferdam as a whole can still be self-sustaining and stable in a short time, and there will be no safety accidents such as the cofferdam becoming unstable and collapsing instantly. Therefore, this method of using a powerful "idle" anti-collision system to increase the safety factor reserve of the cofferdam body allows the cofferdam body to achieve a high structural strength with only a single layer, and has the safety and stability of a traditional double-layer cofferdam. At the same time, since the vertical supports do not need to be set up in a circle along the cofferdam body in a close proximity, two adjacent vertical supports can be set at a certain distance, which also reduces the use of materials and reduces costs. In short, this stable frame structure can not only enhance the anti-collision function, but also play a role in supporting and stabilizing the cofferdam.

[0021] (5) A damping rubber strip is provided between the outer plate and the middle plug plate of the present invention. The damping rubber strip is adhered to the outer plate. A plurality of groups of spring buckles are provided at both ends of the middle plug plate. The damping rubber strip can fix the middle plug plate in a desired position when the middle plug plate is displaced in the vertical direction in the outer plate and does not easily displace. When the middle plug plate is pulled out, the corresponding spring buckle pops out of the outer plate, so that the middle plug plate will not easily fall down.

[0022] (6) A water-stopping rubber airbag is arranged between the end of the aluminum alloy H-profile and the panel of the present invention, and a water-stopping rubber strip is pasted on the part where the aluminum alloy H-profile is attached to the panel. The water-stopping rubber airbag can be inflated to fill the gap between the groove of the aluminum alloy H-profile and the end of the panel, and together with the water-stopping rubber strip, it forms a sealed flexible water-stop strip, thereby achieving waterproofing of the cofferdam body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view schematic diagram of the present invention;

[0024] Figure 2 is a schematic cross-sectional view of the cofferdam (AA);

[0025] Figure 3 It is a schematic diagram of the cofferdam from top view;

[0026] Figure 4 This is a schematic diagram of the cofferdam end looking down;

[0027] Figure 5 It is a schematic diagram of the left side view of the protruding member of the cofferdam;

[0028] Figure 6 This is a schematic diagram of the horizontal support of the cofferdam;

[0029] Figure 7 It is a left view schematic diagram of the anti-collision column and the vertical support of the cofferdam;

[0030] Figure 8 It is a schematic diagram of the inner telescopic panel;

[0031] In the figure, 1-anti-collision system; 11-anti-collision column; 12-vertical support; 13-connector one; 14-connector two; 15-connector three, 16-solar flashing light; 2-cofferdam body; 21-panel; 211-outer plate; 212-middle plug plate; 213-damping rubber strip; 214-spring buckle; 22-lateral support; 221-hole two; 222-sealing plate; 23-aluminum alloy H-profile; 231-left groove; 232-right groove; 24-protruding member; 241-hole one; 25-wedge-shaped pin; 26-water-stop rubber airbag; 27-water-stop rubber strip. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-4 As shown, a light-weight retractable anti-collision and wave-breaking cofferdam for inland waterway construction comprises an anti-collision system 1 and a cofferdam body 2. The cofferdam body 2 is arranged in parallel with the anti-collision system 1. The anti-collision system 1 is separated from the cofferdam body 2. The anti-collision system 1 can prevent ships from colliding with the cofferdam body itself, thereby largely avoiding the safety risks of passing ships colliding with the cofferdam and the risk of overall collapse after collision. At the same time, the vertical support of the anti-collision system 1 is separated from the crossbeam of the cofferdam body 2 but fits tightly, and the anti-collision system is used to further stabilize the cofferdam body.

[0034] The anti-collision system 1 includes anti-collision columns 11 and vertical supports 12 that are spaced and vertically arranged from the water-facing side to the water-receiving side. The anti-collision columns 11 and the vertical supports 12 are arranged correspondingly in number and position. The upper part of the vertical support 12 is connected to the upper part of the corresponding anti-collision column 11 by a connector 13; two adjacent anti-collision columns 11 are connected by a connector 2 14, and two adjacent vertical supports 12 are connected by a connector 3 15, forming a stable anti-collision lattice unit. The cofferdam body 2 is formed by connecting a plurality of cofferdam units, each of which includes a panel 21 and a lateral support 22 arranged from the water-facing side to the water-receiving side, and the panel 21 is arranged on the water-receiving side of the anti-collision column 11; the vertical support 12 is arranged tightly on the water-receiving side of the cofferdam body 2.

[0035] The anti-collision column 11 can be a single 16m long φ40*5 aluminum alloy pipe pile, each weighing about 23kg. It is 3-8m away from the cofferdam body 2, and one is set every 2m to form a pile structure with a step distance of 2m. A single horizontal support 22 can be an aluminum alloy groove profile (80mm*43mm*5mm), with a length of 2m and a weight of about 5kg; the vertical support 12 can be a 12m long φ30*5 aluminum alloy pipe pile, each weighing 12kg; the connector 13 can be an aluminum alloy groove profile (50mm*37mm*4.5mm), with a length of 5-8m and a weight of about 10kg; the connector 2 14 can be an aluminum alloy groove profile (80mm*43mm*5mm), with a length of 2m and a weight of about 5kg; the connecting piece 3 15 can be an aluminum alloy groove profile (50mm*37mm*4.5mm), a single piece is 2m long and weighs about 4kg; the connecting piece 1, the connecting piece 2 and the connecting piece 3 are all rigidly connected by welding, and the vertical support 12 is arranged every 2m along the cofferdam direction, and the vertical support 12 is arranged in the middle position of the transverse support 22, and is tightly applied with the transverse support 22 of the cofferdam body to form a nearly vertical structure, which can withstand the positive head pressure transmitted by the transverse support 22 and stabilize the cofferdam body.

[0036] The two adjacent vertical supports 12 and the corresponding two adjacent anti-collision columns 11 form a stable frame structure through various connecting parts, which is firm and reliable. Part of the risk of the cofferdam body 2 collapsing inward during the construction process will be transmitted to the anti-collision columns through the tightly fitting vertical supports 12 and the connecting piece 13. The anti-collision columns 11 share the force of the cofferdam body 2 collapsing inward due to the external water pressure, thereby preventing the cofferdam body 2 from collapsing inward. When a ship scrapes against a cofferdam, the anti-collision system 1 will first block the ship, which generally does not affect the safety of the cofferdam body 2. Even if the anti-collision system 1 is greatly deformed, the anti-collision column 11 drives the vertical support 12 to move backward as a whole, and the vertical support 12 and the lateral support 22 of the cofferdam body 2 are tightly fitted (not rigidly connected) and separated instantly, the cofferdam body 2 can still be self-stable, and there will be no safety accidents such as the cofferdam instantly becoming unstable and collapsing. Therefore, this use of the anti-collision system 1 to increase the safety of the cofferdam body 2, coupled with the lateral support 22, means that the cofferdam body 2 only needs one layer of aluminum alloy honeycomb high-strength panel 21 to achieve higher structural strength and safety, which is safe and economical, without the need for a "tall, bulky" structure like a traditional double-layer cofferdam, which is time-consuming and labor-intensive.

[0037] The panel 21 includes an outer plate 211 and an intermediate plug plate 212 disposed in the outer plate 211, and the intermediate plug plate 212 can move up and down in the vertical direction relative to the outer plate 211. The intermediate plug plate can be pulled out as needed to realize the retractable panel, so that the cofferdam body can flexibly adjust the height of the cofferdam according to the water level changes. Different adjustment heights of the intermediate plug plate can be designed according to the water depth of the channel in different construction sections, basically one gear increases by 0.4-0.5m, and the intermediate plug plate 212 is pulled out at the highest position, which is lower than the height of the connector 13. This can well adapt to the influence of water level changes caused by channel ship waves or extreme weather, prevent overtopping, and flexibly increase the height of the cofferdam body without increasing the manufacturing cost of the cofferdam.

[0038] The horizontal support 22 and the vertical support 12 are both made of aluminum alloy, the panel 21 including the outer plate 211 and the middle plug plate 212 are both made of high-strength honeycomb aluminum alloy, and the connector 1, connector 2 14, and connector 3 15 are all made of aluminum alloy slot profiles. Preferably, the middle plug plate 212 is a hollow plate, and the aluminum alloy material is light and environmentally friendly. Most of the components of the light structure weigh less than 20kg, and can be carried and assembled quickly by hand, which improves construction efficiency, does not require clay filling in the middle, does not pollute the water body, and these materials can be reused after dismantling.

[0039] The number of transverse supports 22 in each cofferdam unit is 3-5, and the number of vertical supports 12 attached to the back water surface of each cofferdam unit is 1.

[0040] Two adjacent cofferdam units are spliced ​​together by inserting two adjacent panels 21 into the left groove 231 and the right groove 232 of the same aluminum alloy H profile 23; the two ends of the transverse support 22 are respectively connected to the back water surface of the two adjacent aluminum alloy H profiles 23. This small unit splicing structure of the cofferdam is convenient for on-site installation and dismantling, and realizes convenient and "small, fast and flexible" construction. Taking into account the nearshore water depth of 1-2.5m for general inland high-grade waterway construction, and the safety requirement that the cofferdam structure be buried deeper than the cantilever, the length of the aluminum alloy H profile 23 (200mm*150mm*5.5mm*8mm) is selected to be 9-12m, and the weight of a single piece is about 65kg. During the construction process, half of its length can be inserted into the soil, and one is arranged every 2m along the cofferdam direction to stabilize the cofferdam body.

[0041] like Figure 5-6As shown, the connection method between the transverse support 22 and the aluminum alloy H profile 23 is that a protruding member 24 is welded on the outer side of the back surface of the aluminum alloy H profile 23, and the protruding member 24 is provided with a plurality of holes 241 along the plane direction. The two ends of the transverse support 22 are also provided with a plurality of holes 221 along the plane direction. The holes 241 and the holes 221 correspond in number and position. The transverse support 22 and the aluminum alloy H profile 23 are fixed by inserting the wedge-shaped pin 25 into the holes 241 and the holes 221 at the same time, so that the transverse support 22 can support the panel 21. The protruding member 24 is a bracket structure of an aluminum alloy slot bar, with a single length of 20 cm, connected to the aluminum alloy H profile 23 by welding, and connected to the transverse support 22 by the wedge-shaped pin 25. The length of hole 1 241 and hole 221 can be 2-3 cm, and they are arranged along the direction of the cofferdam, so that they can be quickly inserted and fixed even if there is an error. A sealing plate 222 can be welded to the side of the transverse support 22 close to the panel 21. The sealing plate 222 can be an aluminum alloy profile, so that the transverse support 22 fits tightly against the cofferdam panel 21 to facilitate force.

[0042] like Figure 2-4 As shown in Figure 8, a damping rubber strip 213 is provided between the outer plate 211 and the middle plug plate 212. The damping rubber strip 213 is pasted on the outer plate 211. Several groups of spring clips 214 are provided at both ends of the middle plug plate 212 so that the middle plug plate 212 can be fixed in the desired position when the middle plug plate 212 is displaced in the vertical direction in the outer plate 211. When the middle plug plate 212 is not pulled out, the panel 21 is 3m high and slightly less than 2m wide, leaving a little thickness margin for the H-profile 23 and the waterproof rubber airbag 26. Three groups of spring clips 214 can be provided so that together with the damping rubber strip 213, the expansion and contraction of the middle plug plate 212 can be well controlled, the middle plug plate 212 can be conveniently pulled out, and three heights can be adjusted and fixed. The lower end of the panel 21 is pointed, which is convenient for construction and insertion into the soil layer. The single panel 21 weighs 40kg, which is convenient for construction and transportation. The damping rubber strip 213 can fix the required position of the middle plug plate 212 when it is displaced in the vertical direction in the outer plate 211, and prevent it from being displaced easily. When the middle plug plate 212 is pulled out, the corresponding spring buckle 214 pops out of the outer plate 211, and the middle plug plate 212 will not fall down easily.

[0043] A water-stop rubber airbag 26 is arranged between the ends of the aluminum alloy H-profile 23 and the panel 21, and a water-stop rubber strip 27 is pasted on the aluminum alloy H-profile 23 where it is attached to the panel 21. The water-stop rubber airbag 26 can be a 0.1Mpa pressure-bearing, 4m long, high-strength fiber-made airbag that can be inflated and deflated to fill the gap between the aluminum alloy H-profile 23 and the end of the panel 21, and together with the water-stop rubber strip 27, it forms a sealed flexible water-stop belt, thereby achieving waterproofing of the cofferdam body 2.

[0044] like Figure 7As shown, a solar powered flashing light 16 is disposed on the upper end of the anti-collision column 11 , instead of installing a flashing light on the traditional cofferdam body, which can warn passing ships to avoid it, and is safer for the cofferdam body 2 .

[0045] Before the construction of the present invention, the aluminum alloy H-profile 23, the wedge-shaped pin 25, the lateral support 22 welded with the sealing strip 222, the vertical support 12, the grooves of each connecting piece, the aluminum alloy pipe column, the protruding member 24 and the corresponding holes on the lateral support 22, the panel 21 including the middle plug plate 212, the solar flash light 16 and other materials are prepared first, and during the construction: step 1, the waterproof rubber strip 27 is pasted on the inner side of the aluminum alloy H-profile 23, and the protruding member 24 is welded on the outer side; step 2, 2 aluminum alloy H-profiles 23 with a length of 12m welded with the protruding member 24 are driven into the water, one is driven every 2m, and the depth of insertion into the soil is about 6m-7m; step 3, the panel 21 with a height of about 3m and the waterproof rubber airbag 26 are respectively inserted into the left and right grooves of the two adjacent aluminum alloy H-profiles 23, wherein the depth of the panel into the soil is 0.2-0 .5m; Step 4, place the transverse support 22 on the protruding member 24, and insert the wedge-shaped pin 25 from top to bottom into the hole 2 (221) of the transverse support 22 and the hole 1 (241) of the protruding member 24 to overlap the transverse support 22; Step 5, arrange one vertical support 12 every 2m along the cofferdam direction, and set it in the middle position of each cofferdam unit, and tightly apply it to the transverse support 22 of the cofferdam body; Step 6, set up the anti-collision column 11, and the connection line between it and the vertical support 12 is basically perpendicular to the panel 21; Step 7, weld the aluminum alloy groove 13 between the anti-collision column 11 and the vertical support 12 as a connecting piece 1; Step 8, weld the groove between two adjacent anti-collision piles 11 as a connecting piece 2 14, and weld the groove between the vertical supports 12 as a connecting piece 3 15, and repeat the erection in sequence to form a stable cofferdam, and finally pump water inside the cofferdam.

[0046] The component size selected in the embodiment of the present invention is suitable for most inland waterway construction conditions. In case of extreme terrain or water depth, the material, quantity, size, burial depth, etc. of the selected components can be appropriately adjusted according to the actual project.

Claims

1. A light and retractable anti-collision and anti-wave cofferdam for inland waterway construction, characterized in that: The invention comprises an anti-collision system (1) and a cofferdam body (2), wherein the cofferdam body (2) is arranged in parallel with the anti-collision system (1); the anti-collision system (1) comprises anti-collision columns (11) and vertical supports (12) which are arranged at intervals from the water-facing surface to the water-receiving surface, wherein the anti-collision columns (11) and the vertical supports (12) are arranged correspondingly in number and position, the upper part of the vertical supports (12) is connected to the upper part of the corresponding anti-collision columns (11) by a first connecting member (13), the adjacent anti-collision columns (11) are connected by a second connecting member (14), and the adjacent vertical supports (12) are connected by a third connecting member (15). ) are connected to form a stable anti-collision lattice unit; the cofferdam body (2) is formed by connecting a plurality of cofferdam units, each of the cofferdam units comprises a panel (21) and a transverse support (22) arranged from the water-facing side to the water-receiving side, and the panel (21) is arranged on the water-receiving side of the anti-collision column (11); the vertical support (12) is arranged in close contact with the water-receiving side of the cofferdam body (2); the panel (21) comprises an outer plate (211) and an intermediate plug plate (212) arranged in the outer plate (211), and the intermediate plug plate (212) can move up and down in the vertical direction relative to the outer plate (211).

2. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 1, characterized in that: The transverse support (22) and the vertical support (12) are both made of aluminum alloy, the panel (21) is made of high-strength honeycomb aluminum alloy, and the connecting piece 1 (13), the connecting piece 2 (14), and the connecting piece 3 (15) are all made of aluminum alloy.

3. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 2, characterized in that: The number of the transverse supports (22) in each cofferdam unit is 3-5, and the number of the vertical supports (12) attached to the back water surface of each cofferdam unit is 1-2.

4. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 2, characterized in that: Two adjacent cofferdam units are spliced ​​together by inserting two adjacent panels (21) into the left and right grooves (231, 232) of the same aluminum alloy H-profile (23), respectively; and the two ends of the transverse support (22) are respectively connected to the back water surfaces of the two adjacent aluminum alloy H-profiles (23).

5. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 4, characterized in that: The connection method is as follows: a protruding member (24) is welded on the outer side of the back surface of the aluminum alloy H-profile (23); the protruding member (24) is provided with a plurality of first holes (241) along the plane direction; and both ends of the transverse support (22) are also provided with a plurality of second holes (221) along the plane direction; the first holes (241) and the second holes (221) correspond in number and position; and the transverse support (22) and the aluminum alloy H-profile (23) are fixed by inserting a wedge-shaped pin (25) into the first holes (241) and the second holes (221) at the same time.

6. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 4 or 5, characterized in that: A sealing plate (222) is provided on a side of the transverse support (22) close to the panel (21).

7. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 6, characterized in that: A damping rubber strip (213) is arranged between the outer plate (211) and the middle plug plate (212), and the damping rubber strip (213) is adhered to the outer plate (211). A plurality of groups of spring buckles (214) are arranged at both left and right ends of the middle plug plate (212), so that the middle plug plate (212) can be fixed at a desired position when a vertical displacement occurs in the outer plate (211).

8. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 7, characterized in that: A water-stopping rubber airbag (26) is arranged between the ends of the aluminum alloy H-shaped material (23) and the panel (21), and a water-stopping rubber strip (27) is pasted at the locations where the aluminum alloy H-shaped material (23) is attached to the panel (21).

9. A light-duty retractable anti-collision and anti-wave cofferdam for inland waterway construction as claimed in claim 2, characterized in that: A solar powered flashing light (16) is arranged at the upper end of the anti-collision column (11).

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