High-position assembled low-water-level bottom sealing steel cofferdam for tidal influence marine environment and construction method

Abstract

The invention relates to a high-position assembled low-water-level bottom sealing steel cofferdam under the tidal influence marine environment and a construction method. The high-position assembled low-water-level bottom sealing steel cofferdam comprises an outer protection construction mechanism and an inner supporting and protecting mechanism. The cofferdam top sealing device has the beneficial effects that the driving assembly drives the rotating assembly to drive the reinforcing column to rotate, the reinforcing column drives the adjusting plate and the protection plate to rotate, the adjusting plate, the side edge plate and the protection plate are combined into a whole plane, and therefore top sealing operation can be conducted on a cofferdam structure, the waterproof protection effect can be achieved, and meanwhile the whole operation is simple and convenient; if water flow occurs at the top sealing part, the water flow can enter the water collecting hopper through the drainage hole and is drained outwards through the drainage equipment, and the problem that water is accumulated in the cofferdam structure due to water accumulation is further solved; due to the fact that the low-tide-level construction time is limited, in order to ensure that the construction progress meets the requirement, the cofferdam and the hanging system are assembled in the high-water-level state, and therefore the construction period can be effectively shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of steel cofferdam construction, and particularly relates to a high-position assembled steel cofferdam with low-water-level bottom sealing in a marine environment affected by tides and a construction method thereof. Background Art

[0002] When carrying out the construction operation of a steel cofferdam in a marine environment, it is often significantly affected by the tidal phenomenon, which undoubtedly brings great inconvenience to the bottom sealing treatment of the steel cofferdam, further increasing the construction difficulty and prolonging the project period. What is more complicated is that once it rains during the construction period, the rainwater often easily penetrates into the internal operation area of the steel cofferdam, which not only disrupts the established construction rhythm, affects the overall progress, but also poses a potential threat to the construction quality.

[0003] In addition, the support structure adopted inside the traditional steel cofferdam is often limited to the support function in a single direction and lacks the necessary mutual support and force sharing mechanism. This limitation makes it difficult for the support system to fully exert its due effectiveness when facing complex and changeable load conditions, and the support effect is thus greatly reduced. To sum up, the construction of steel cofferdams in a marine environment not only faces natural challenges brought by tides and weather, but is also restricted by the technical bottlenecks of traditional support structures, and there is an urgent need for more advanced and efficient construction technologies and support schemes to address these problems. Summary of the Invention

[0004] The purpose of the invention is to overcome the deficiencies in the prior art and provide a high-position assembled steel cofferdam with low-water-level bottom sealing in a marine environment affected by tides and a construction method thereof.

[0005] This high-position assembled steel cofferdam with low-water-level bottom sealing in a marine environment affected by tides includes an outer protection construction mechanism and an inner support and protection mechanism; the outer protection construction mechanism includes a cofferdam assembly, a side protection assembly is assembled on the inner wall of the cofferdam assembly, and a plurality of casing pipes penetrate through the side protection assembly; a water collecting hopper is connected to the inner wall of the cofferdam assembly at the bottom of the side protection assembly; the inner support and protection mechanism includes guide rails, the guide rails are installed on the upper part of the outer wall of the cofferdam structure, a driving component slides on the top of the guide rails, the driving component meshes with a rotating component through a gear; a reinforcing column is connected to the rotating component by a shaft; adjustable protection and reinforcement components and reinforcement components are connected to the side wall of the reinforcing column, the reinforcement components are attached to the casing pipes; a longitudinal support component and a transverse support component are arranged below the adjustable protection and reinforcement components and support on the inner wall of the cofferdam assembly.

[0006] Preferably, the cofferdam assembly includes a cofferdam structure, the water collecting hopper is installed on the inner wall of the cofferdam structure, the precast bottom plates are assembled in multiple pieces and are formed into a whole by pouring, precast holes are provided on the precast bottom plates, the casing pipes penetrate through the precast holes, the precast bottom plates are installed at the bottom of the cofferdam structure, and the cofferdam structure is composed of a plurality of cofferdam side plates.

[0007] Preferably, the side protection component includes side plates. Multiple arc-shaped holes are formed in the side plates, and the side plates are attached to the casing through multiple arc-shaped parts. The side plates are fixedly installed on the inner wall of the cofferdam component. Three fixed buckle heads are installed along the edge line of the arc-shaped holes at the top of the side plates. A plurality of drain holes are provided at the top of the side plates in contact with the inner wall of the cofferdam component. A drainage device is installed on the side wall of the cofferdam structure above the side plates, and one end of the drainage device passes through the drain hole and extends into the water collecting hopper.

[0008] Preferably, the transverse support component includes transverse columns, and the longitudinal support component includes longitudinal columns. Both ends of the transverse columns and the longitudinal columns are installed on the inner wall of the cofferdam structure. The longitudinal columns are fixed on the top of the transverse columns. Lower fasteners are fixed on the side walls of the transverse columns. Lower buckle heads are fixed on the side walls of the longitudinal columns, and the lower buckle heads are fitted together with the lower fasteners. Upper buckle heads are fixedly connected to the central side walls of the longitudinal columns on the opposite side of the lower buckle heads. The adjustable protection and reinforcement component includes a rolling outer ring. The rolling outer ring is formed on one side wall of the cofferdam structure. A rotating member rotates in the rolling outer ring, and a reinforcement column is fixed between the rotating members. One side wall of the reinforcement column is fixedly connected to a guard plate, and the other side wall is fixedly connected to an adjustment plate. Adjustment buckle members are installed along the edge line of the adjustment plate surface, and the adjustment buckle members are fitted with the upper buckle heads.

[0009] Preferably, arc-shaped holes are formed in the side walls of the guard plate and the adjustment plate. A plurality of balls are provided on both sides of the adjustment plate and the guard plate, and the balls roll on the inner wall of the cofferdam structure.

[0010] Preferably, a set of reinforcement components includes two wheel rods. The wheel rods are fixedly connected to the reinforcement column, and a pulley is installed at the connection of the two wheel rods. The pulley is tangent to the outer wall of the casing.

[0011] Preferably, the rotating component includes a rotating rod, and the rotating rod is connected through the reinforcement column. Gears are fixedly connected to both ends of the rotating rod. The driving component includes a hydraulic seat. The hydraulic seat is fixedly connected to the outer wall above the guide rail of the cofferdam structure. A two-way electric hydraulic rod passes through the hydraulic seat. Tooth rods are fixedly connected to both ends of the two-way electric hydraulic rod. The tooth rods are engaged with the gears. Guide wheels are fixed at the bottom of the tooth rods, and the guide wheels slide on the guide rail.

[0012] This construction method of a high-position assembled and low-water-level sealed steel cofferdam affected by tides in the marine environment includes the following steps:

[0013] S1. Weld and assemble brackets on the casing above the high water level elevation, and hoist the bottom of the cofferdam component onto the brackets.

[0014] S2. After splicing the side plates of the cofferdam into a whole, install hanging equipment on the casing. Use the hanging equipment to lift the cofferdam structure by a certain distance and level it. Cut off the brackets of the cofferdam bottom plate and then slowly lower the cofferdam structure to the design elevation.

[0015] S3. During the waterproof operation, the driving component meshes with the rotating component through gears to form an integral body of the side protection component and the adjustable protection and reinforcement component to seal the cofferdam structure;

[0016] S4. When water flows into the sealed part, the water will be discharged into the water collecting hopper and the liquid will be discharged when drainage is required.

[0017] Preferably, in step S3, the side protection component includes side plates which are fixedly installed on the inner wall of the cofferdam component; one side wall of the reinforcement column is fixedly connected with a guard plate, and the other side wall is fixedly connected with an adjustment plate; adjustment buckle pieces are installed along the edge line of the adjustment plate surface, and the adjustment buckle pieces are embedded with upper buckle heads; the rotating component includes a rotating rod which penetrates and is connected in the reinforcement column, and gears are fixedly connected to both ends of the rotating rod; the driving component includes a hydraulic seat which is fixedly connected to the outer wall above the guide rail of the cofferdam structure, a two-way electric hydraulic rod penetrates through the hydraulic seat, and toothed rods are fixedly connected to both ends of the two-way electric hydraulic rod, and the toothed rods are meshed with the gears.

[0018] Preferably, in step S3, the toothed rod is driven to move by a double-axis electric hydraulic rod, the toothed rod is in transmission with the gear, so that the gear drives the rotating rod and the reinforcement column to rotate, the reinforcement column drives the adjustment plate and the guard plate to rotate, so that the adjustment plate drives the adjustment buckle piece to engage with the fixed buckle head, the adjustment plate is docked with the side plate on the casing, and similarly, the two guard plates are docked on the casing, so that the adjustment plate, the side plate and the guard plate form an integral plane to seal the cofferdam structure.

[0019] The beneficial effects of the present invention are:

[0020] 1) In the present invention, the driving component drives the rotating component to rotate, the rotating component drives the reinforcement column to rotate, the reinforcement column drives the adjustment plate and the guard plate to rotate, so that the adjustment plate is docked and enclosed with the side plate on the casing. Similarly, the two guard plates are turned over, docked and enclosed on the casing, so that the adjustment plate, the side plate and the guard plate are combined into a flat integral body, thereby the cofferdam structure can be sealed, and thus the waterproof protection can be achieved. At the same time, the whole operation is simple and convenient. Secondly, if there is water flow in the sealed part, the water flow can enter the water collecting hopper through the drainage holes and be drained outwards through the drainage equipment, further reducing the problem of water accumulation in the cofferdam structure caused by water accumulation. Secondly, due to the limited construction time at low tide level, in order to ensure that the construction progress meets the requirements, the cofferdam and the hanging system are assembled under the high water level state, thereby effectively shortening the construction period.

[0021] 2) In the present invention, the lower buckle is fitted with the lower fastener to connect the transverse column and the longitudinal column. At the same time, the upper buckle is fitted with the adjustable buckle component to connect the longitudinal column and the reinforcement column. By increasing the connection nodes in this way, the longitudinal column, the transverse column and the reinforcement column are connected. At the same time, the pulley is connected to the reinforcement column through the wheel rod and contacts the protective cylinder, thereby increasing the support points, changing the overall rigidity and stability of the structure, effectively dispersing the load, reducing the stress on a single structure, and enhancing the overall force balance of the structure.

[0022] 3) In the present invention, the driving component drives the rotating component to rotate, so that the adjustable protection and reinforcement component drives the guard plate to rotate, and the adjustable protection and reinforcement component is docked with the side plate. At the same time, the guard plates remain docked with each other, thereby realizing the capping operation of the cofferdam structure. At the same time, the adjustable protection and reinforcement component is also fitted with the side protection component, so that the entire enclosed plane can play the roles of waterproofing and supporting the cofferdam structure, effectively improving the support effect of the cofferdam structure and enhancing the safety of the cofferdam structure, thus meeting the safety and stability requirements of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the construction of the cofferdam structure in the present invention;

[0024] Figure 2 It is a schematic structural diagram of the top view construction of the cofferdam structure in the present invention;

[0025] Figure 3 It is a schematic structural diagram of the overall three-dimensional section in the present invention;

[0026] Figure 4 It is a schematic structural diagram of the connection between the cofferdam component and the side protection component in the present invention;

[0027] Figure 5 It is a schematic structural diagram of the connection between the driving component and the rotating component in the present invention;

[0028] Figure 6 It is a schematic three-dimensional sectional view of the cofferdam component in the present invention;

[0029] Figure 7 It is a schematic three-dimensional sectional view of the cofferdam structure in the present invention;

[0030] Figure 8 It is a schematic structural diagram of the separation of the longitudinal support component and the transverse support component in the present invention;

[0031] Figure 9 It is a schematic three-dimensional view of the adjustable protection and reinforcement component in the present invention;

[0032] Figure 10 It is a schematic three-dimensional view of the driving component in the present invention;

[0033] Figure 11 Schematic diagram of the precast bottom plate installed in the casing in the present invention;

[0034] Figure 12 Schematic diagram of the combination of the precast bottom plates in the present invention.

[0035] Description of reference numerals: 100, outer protection construction mechanism; 101, cofferdam assembly; 1011, cofferdam structure; 1012, precast bottom plate; 1013, precast hole; 102, side protection assembly; 1021, side plate; 1022, fixed buckle head; 1023, drain hole; 103, water collecting hopper; 104, drainage equipment; 200, inner support and protection mechanism; 201, guide rail; 202, drive assembly; 2021, hydraulic seat; 2022, bidirectional electric hydraulic rod; 2023, rack; 2024, guide wheel; 203, rotating assembly; 2031, rotating rod; 2032, gear; 204, adjustable protection and reinforcement assembly; 2041, reinforcement column; 2042, adjustment buckle; 2043, adjustment plate; 2044, rotating member; 2045, rolling outer ring; 205, transverse support assembly; 2051, transverse column; 2052, lower fastener; 206, longitudinal support assembly; 2061, longitudinal column; 2062, lower buckle; 2063, upper buckle; 207, protection plate; 208, reinforcement assembly; 2081, pulley; 2082, wheel rod; 209, ball; 300, casing. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0037] Embodiment 1

[0038] As an embodiment, as Figures 1 to 12As shown in the figure, this high-position assembled and low-water-level sealed steel cofferdam affected by tides in the marine environment includes an outer protection construction mechanism (100) and an inner support and protection mechanism (200); the outer protection construction mechanism (100) includes a cofferdam component (101), the inner wall of the cofferdam component (101) is equipped with a side protection component (102), and a plurality of casing pipes (300) penetrate through the side protection component (102); a water collecting hopper (103) is connected to the inner wall of the cofferdam component (101) at the bottom of the side protection component (102); the inner support and protection mechanism (200) includes a guide rail (201), the guide rail (201) is installed on the upper part of the outer wall of the cofferdam structure (1011), a driving component (202) slides on the top of the guide rail (201), and the driving component (202) meshes with a rotating component (203) through a gear (2032); the rotating component (203) is connected to a reinforcing column (2041) by a shaft; an adjustable protection and reinforcement component (204) and a reinforcement component (208) are connected to the side wall of the reinforcing column (2041), and the reinforcement component (208) is attached to the casing pipe (300); a longitudinal support component (206) and a transverse support component (205) are arranged below the adjustable protection and reinforcement component (204) and support on the inner wall of the cofferdam component (101).

[0039] As Figures 1 to 6 , Figures 9 to 12 shown, this high-position assembled and low-water-level sealed steel cofferdam affected by tides in the marine environment includes an outer protection construction mechanism 100, and an inner support and protection mechanism 200 is arranged on the outer protection construction mechanism 100;

[0040] The external protection construction mechanism 100 includes a cofferdam assembly 101. The cofferdam assembly 101 includes a cofferdam structure 1011 and a precast bottom plate 1012. The guide rail 201 is installed outside the cofferdam structure 1011, and the water collecting hopper 103 is installed inside the cofferdam structure 1011. The water collecting hopper 103 can play a role in collecting water, avoiding the accumulation of water flowing downward at the precast bottom plate 1012. The precast bottom plate 1012 is composed of multiple pieces and is formed into a whole by pouring. There are precast holes 1013 on the precast bottom plate 1012. The protection cylinder 300 can pass through the precast holes 1013, which is convenient for direct combined use. The precast holes 1013 are arranged outside the protection cylinder 300. The cofferdam structure 1011 is installed on the precast bottom plate 1012. The precast bottom plate 1012 adopts a thin bottom seal structure design, which can greatly reduce the bottom seal pouring time on the premise of ensuring the stress requirements of the cofferdam structure 1011. The cofferdam structure 1011 is composed of multiple cofferdam side plates. The cofferdam structure 1011 is formed by enclosing with the cofferdam side plates, which can play a role in enclosing. The cofferdam assembly 101 is assembled outside multiple protection cylinders 300. Side protection components 102 are assembled on both sides inside the cofferdam assembly 101. The side protection component 102 includes a side plate 1021. The side plate 1021 is attached to the protection cylinder 300 through multiple arc-shaped parts. The side plate 1021 is fixedly installed on the inner wall of the cofferdam structure 1011. There are three fixed buckle heads 1022 installed on the side plate 1021. The fixed buckle heads 1022 are adapted to the adjustable buckle parts 2042, and then the adjustable plate 2043 can be combined with the side plate 1021, which is convenient for sharing the stress of the cofferdam structure 1011. There are multiple drainage holes 1023 on the side plate 1021 and near the inner wall of the cofferdam structure 1011. A drainage device 104 is installed on the side wall of the cofferdam structure 1011. The water flow above can be guided into the water collecting hopper 103 through the drainage holes 1023 and can be discharged through the drainage device 104. One end of the drainage device 104 passes through the drainage holes 1023 and extends into the water collecting hopper 103. The water collecting hopper 103 is assembled inside the cofferdam assembly 101;

[0041] The inner support and protection mechanism 200 includes a guide rail 201 and two drive components 202. The guide rail 201 and the water collecting bucket 103 can be assembled or installed as a whole according to the needs. After installation, the guide rail 201 and the water collecting bucket 103 are enclosed on the four sides of the cofferdam structure 1011, thereby enhancing the stability of the cofferdam structure 1011 and preventing the cofferdam structure 1011 from deforming. The drive component 202 includes two hydraulic seats 2021, and the two hydraulic seats 2021 are fixedly connected to the cofferdam structure 1011. Two-way electric hydraulic rods 2022 are installed on the two hydraulic seats 2021. The two-way electric hydraulic rods 2022 drive the gear rod 2023 to move, so that the gear The rod 2023 is driven by the gear 2032 to realize power transmission, so as to drive the rotating rod 2031 to rotate. Both ends of the bidirectional electric hydraulic rod 2022 are fixedly connected with the gear rod 2023, and the gear rod 2023 is meshed with the gear 2032. A guide wheel 2024 is fixed below the gear rod 2023, and the guide wheel 2024 slides on the guide rail 201. The guide wheel 2024 can roll on the guide rail 201, so that the gear rod 2023 can move smoothly. The driving assembly 202 is arranged above the guide rail 201, and the two driving assemblies 202 are connected with the two rotating assemblies 203. The rotating assembly 203 is penetrated by the cofferdam, and the rotating assembly 203 is provided with a cofferdam. An adjustable protection and reinforcement component 204 is provided, and the adjustable protection and reinforcement component 204 includes a reinforcement column 2041 and two rolling outer rings 2045, the two rolling outer rings 2045 are installed on the cofferdam structure 1011, and a rotating member 2044 is rotated in the two rolling outer rings 2045, and the rotating member 2044 can rotate on the rolling outer rings 2045, so that the reinforcement column 2041 can rotate smoothly, the two rotating members 2044 are fixed to the two ends of the reinforcement column 2041, the guard plate 207 is fixedly connected to the reinforcement column 2041, and an adjustment plate 2043 is fixedly installed below the reinforcement column 2041, and the adjustment plate 2043 and the guard plate 207 are connected. A plurality of balls 209 are arranged on both sides, and the friction resistance between the adjustment plate 2043 and the guard plate 207 and the cofferdam structure 1011 can be reduced by the balls 209, so that the adjustment plate 2043 and the guard plate 207 can be adjusted smoothly. The balls 209 roll on the inner wall of the cofferdam structure 1011. Three adjustment buckles 2042 are installed below the adjustment plate 2043, and one of the adjustment buckles 2042 is engaged with the upper buckle head 2063. A guard plate 207 is arranged above the adjustable protection and reinforcement component 204, and reinforcement components 208 are arranged on both sides of the adjustable protection and reinforcement component 204, and the reinforcement components 208 are attached to the casing 300;

[0042] A longitudinal support assembly 206 is disposed below the adjustable protection reinforcement assembly 208 . The two longitudinal support assemblies 206 are combined with the lateral support assembly 205 below to provide internal support for the cofferdam assembly 101 .

[0043] In this embodiment, the bidirectional electro-hydraulic rod 2022 drives the rack 2023 to move. The rack 2023 is in transmission with the gear 2032, so that the gear 2032 drives the rotating rod 2031 and the reinforcing column 2041 to rotate. The reinforcing column 2041 drives the adjusting plate 2043 and the guard plate 207 to rotate, so that the adjusting plate 2043 is butted against the side plate 1021 and encloses the casing 300. Similarly, the two guard plates 207 are turned over and butted to enclose the casing 300, so that the adjusting plate 2043, the side plate 1021 and the guard plate 207 are combined into a flat integral body, so that the capping operation can be carried out on the cofferdam structure 1011, thus playing a role in waterproof protection. At the same time, the whole operation is simple and convenient. Secondly, if there is water flow in the capping part, the water flow can enter the water collecting hopper 103 through the drain hole 1023 and be drained outwards through the drainage device 104, further reducing the problem of water accumulation in the cofferdam structure 1011 caused by water accumulation. Secondly, due to the limited construction time at low tide level, in order to ensure that the construction progress meets the requirements, the cofferdam and the hanging system are assembled under the high water level state, so that the construction period can be effectively shortened.

[0044] Embodiment 2

[0045] As another embodiment, this Embodiment 2 is proposed on the basis of Embodiment 1, and a more specific high-position assembling and low-water-level bottom-sealing steel cofferdam affected by tides is provided.

[0046] As Figures 7 to 9 shown, the transverse support assembly 205 includes a transverse column 2051, the transverse column 2051 is installed on the cofferdam structure 1011, and a lower fastener 2052 is fixedly installed above the transverse column 2051;

[0047] The longitudinal support assembly 206 includes a longitudinal column 2061. An upper fastener 2063 is fixedly connected above the longitudinal column 2061. Both ends of the longitudinal column 2061 are installed on the inner wall of the cofferdam structure 1011. Two lower fasteners 2062 are fixedly connected below the longitudinal column 2061. The two lower fasteners 2062 are fitted with the lower fastener 2052. By fitting the lower fastener 2062 and the lower fastener 2052 together, the transverse column 2051 and the longitudinal column 2061 are connected, increasing the support points and facilitating stress sharing;

[0048] The reinforcing assembly 208 includes two wheel rods 2082. The two wheel rods 2082 are fixedly connected to the reinforcing column 2041, and a same pulley 2081 is installed at one end of the two wheel rods 2082. The pulley 2081 can reduce the frictional resistance with the casing 300 and keep the operation smooth. Moreover, a triangular structure is formed between the two wheel rods 2082, so that the reinforcing effect can be achieved and the support effect can be improved. The pulley 2081 is lapped on the casing 300;

[0049] The adjustable protection and reinforcement component 204 includes a reinforcement column 2041 and two rolling outer rings 2045. The two rolling outer rings 2045 are installed on the cofferdam structure 1011, and rotating members 2044 are rotatably installed in both of the two rolling outer rings 2045. The two rotating members 2044 are fixed to the two ends of the reinforcement column 2041. The guard plate 207 is fixedly connected to the reinforcement column 2041. An adjusting plate 2043 is fixedly installed below the reinforcement column 2041. The adjusting plate 2043 and the guard plate 207 are both provided with arc-shaped edges, so that the adjusting plate 2043 and the guard plate 207 can be smoothly attached to the casing 300. At the same time, a sealing layer can be added on the arc-shaped edges to increase the sealing performance. A plurality of rolling balls 209 are arranged on both sides of the adjusting plate 2043 and the guard plate 207. The rolling balls 209 roll on the inner wall of the cofferdam structure 1011. Three adjusting buckle members 2042 are installed below the adjusting plate 2043. By fitting the adjusting buckle members 2042 with the upper buckle 2063, the longitudinal column 2061 can be connected to the reinforcement column 2041, and one of the adjusting buckle members 2042 is engaged with the upper buckle 2063.

[0050] In this embodiment, the transverse column 2051 is connected to the longitudinal column 2061 by fitting the lower buckle 2062 with the lower fastener 2052. At the same time, the longitudinal column 2061 is connected to the reinforcement column 2041 by fitting the upper buckle 2063 with the adjusting buckle member 2042. In this way, by increasing the connection nodes, the longitudinal column 2061, the transverse column 2051 and the reinforcement column 2041 are connected. At the same time, the pulley 2081 is connected to the reinforcement column 2041 through the wheel rod 2082 and contacts the casing 300, so as to increase the support points, thereby changing the overall rigidity and stability of the structure, effectively dispersing the load, reducing the stress on a single structure, and thus enhancing the overall stress balance of the structure.

[0051] It should be noted that the parts that are the same or similar to those in Embodiment 1 in this embodiment can be referred to each other and will not be described in detail in this application.

[0052] Embodiment 3

[0053] As another embodiment, this Embodiment 3 is proposed on the basis of Embodiment 2, and a more specific high-position assembled and low-water-level sealed steel cofferdam affected by tides in the marine environment.

[0054] Such as Figure 3 、 Figure 4 and Figure 7As shown in the figure, the inner support and protection mechanism 200 includes a guide rail 201 and two driving components 202. The driving components 202 are arranged above the guide rail 201. The two driving components 202 are in transmission connection with two rotating components 203. The rotating components 203 are arranged through the cofferdam. An adjustable protection and reinforcement component 204 is arranged on the rotating component 203. A guard plate 207 is arranged above the adjustable protection and reinforcement component 204. Reinforcement components 208 are arranged on both sides of the adjustable protection and reinforcement component 204. The reinforcement components 208 are attached to the casing 300. A longitudinal support component 206 is arranged below the adjustable protection and reinforcement component 208. The two longitudinal support components 206 and the transverse support component 205 below are combined to support the inside of the cofferdam component 101.

[0055] In this embodiment: The driving component 202 drives the rotating component 203 to rotate, so that the adjustable protection and reinforcement component 204 drives the guard plate 207 to rotate, so that the adjustable protection and reinforcement component 204 is butted against the side plate 1021. At the same time, the guard plates 207 are kept butted against each other, so as to realize the capping operation of the cofferdam structure 1011. At the same time, the adjustable protection and reinforcement component 204 is also embedded with the side protection component 102, so that the entire enclosed plane can achieve the functions of waterproofing and supporting the cofferdam structure 1011, effectively improving the supporting effect of the cofferdam structure 1011 and enhancing the safety of the cofferdam structure 1011, so as to meet the safety and stability requirements of the project.

[0056] It should be noted that the parts that are the same or similar to those in Embodiment 2 in this embodiment can be referred to each other and will not be elaborated in this application.

[0057] Embodiment 4

[0058] As another embodiment, this Embodiment 4 is proposed on the basis of Embodiment 3. The construction method of the high-position assembly and low-water-level bottom-sealing steel cofferdam affected by tides in this marine environment is as Figures 1 to 12 shown, and includes the following steps:

[0059] S1. Before the construction of the cofferdam structure 1011, precast the bottom slab 1012 in blocks at the backfield. After the precast bottom slab 1012 is formed, it is transported to the construction pier position. According to the length of the low tide, choose to construct at high water level or low tide. At a height above the high water level elevation, use a crawler crane to weld and assemble the bracket on the casing 300. Then, hoist the precast bottom slab 1012 in blocks onto the assembled bracket. After the hoisting of the precast soil bottom slab is completed, adjust the elevation and horizontal position of the precast bottom slab 1012, and weld the temporary connection limit between the precast bottom slab 1012 and the casing 300. Construct concrete at the joints of the precast bottom slab 1012 to connect the precast bottom slab 1012 into a whole. After the concrete strength of the wet joint of the precast bottom slab 1012 reaches the design strength, hoist the cofferdam side plates in blocks and splice the cofferdam side plates into a whole. The joints between the cofferdam side plates and the joints between the cofferdam side plates and the precast bottom slab 1012 are constructed with leak-proof rubber sheets and tightened.

[0060] S2. After the installation of the cofferdam side plates is completed, install the hanging equipment on the casing 300. Use the hanging equipment to lift the cofferdam structure 1011 by a certain distance, and then level the cofferdam structure 1011. Cut off the bracket of the cofferdam bottom slab. Slowly lower the cofferdam structure 1011 as a whole through the hanging system. After the cofferdam structure 1011 is lowered to the design elevation, immediately shim between the precast bottom slab 1012 and the casing 300 to ensure that the cofferdam structure 1011 does not swing. Then, construct the connection between the cofferdam bottom slab and the casing 300 for system conversion.

[0061] S3. When performing the waterproof operation, drive the rack 2023 to move through the double-axis electro-hydraulic rod. The rack 2023 is in transmission with the gear 2032, so that the gear 2032 drives the rotating rod 2031 and the reinforcing column 2041 to rotate. The reinforcing column 2041 drives the adjusting plate 2043 and the guard plate 207 to rotate, so that the adjusting plate 2043 drives the adjusting buckle 2042 to engage with the fixed buckle head 1022, and the adjusting plate 2043 is butted against the side plate 1021 on the casing 300. Similarly, the two guard plates 207 are butted against the casing 300. The adjusting plate 2043, the side plate 1021 and the guard plate 207 form an integral plane to seal the cofferdam structure 1011.

[0062] S4. When water flows into the sealed part, the drain hole 1023 guides the water to flow downward and discharge it into the water collecting hopper 103. When drainage is required, the liquid in the water collecting hopper 103 is discharged through the drainage device 104.

[0063] It should be noted that the same or similar parts in this embodiment and Embodiment 3 can be referred to each other and will not be elaborated in this application.

[0064] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

Claims

1. A tidal impact marine environment high-level assembly low-water level bottom steel cofferdam, characterized in that: include: External protection construction mechanism and internal support and protection mechanism; the external protection construction mechanism includes a cofferdam assembly, the inner wall of the cofferdam assembly is equipped with a side protection assembly, and the side protection assembly is penetrated by multiple casings; the inner wall of the cofferdam assembly at the bottom of the side protection assembly is connected with a water collecting bucket; the internal support and protection mechanism includes a guide rail, the guide rail is installed on the upper part of the outer wall of the cofferdam structure, and a driving assembly slides on the top of the guide rail, and the driving assembly is engaged with a rotating assembly through gears; the rotating assembly shaft is connected with a reinforcement column; the side wall of the reinforcement column is connected with an adjustable protection and reinforcement assembly and a reinforcement assembly, and the reinforcement assembly is attached to the casing; a longitudinal support assembly and a transverse support assembly are arranged below the adjustable protection reinforcement assembly and are supported on the inner wall of the cofferdam assembly.

2. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 1 is characterized in that: The cofferdam assembly includes a cofferdam structure, the water collecting bucket is installed on the inner wall of the cofferdam structure, the prefabricated bottom plate is composed of multiple pieces assembled and cast into a whole, the prefabricated bottom plate is provided with a prefabricated hole, the prefabricated hole is penetrated by a casing, a prefabricated bottom plate is installed at the bottom of the cofferdam structure, and the cofferdam structure is composed of multiple cofferdam side plates.

3. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 1 is characterized in that: The side protection assembly includes a side plate, which is provided with a plurality of arc-shaped holes, and the side plate is fitted on the casing through a plurality of arc-shaped portions; the side plate is fixedly mounted on the inner wall of the cofferdam assembly, and three fixed buckle heads are mounted on the top of the side plate along the edge of the arc-shaped holes, and a plurality of drainage holes are provided on the top of the side plate that fits the inner wall of the cofferdam assembly; a drainage device is installed on the side wall of the cofferdam structure above the side plate, and one end of the drainage device extends through the drainage hole into the water collecting bucket.

4. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 1 is characterized in that: The transverse support assembly includes a transverse column, and the longitudinal support assembly includes a longitudinal column; both ends of the transverse column and the longitudinal column are installed on the inner wall of the cofferdam structure; the longitudinal column is fixed to the top of the transverse column; the side wall of the transverse column is fixed with a lower fastener; the side wall of the longitudinal column is fixed with a lower buckle head, and the lower buckle head and the lower fastener are embedded together; the central side wall of the longitudinal column on the opposite side of the lower buckle head is fixed with an upper buckle head; the adjustable protection and reinforcement assembly includes a rolling outer ring, the rolling outer ring is arranged on the side wall of one side of the cofferdam structure, a rotating part rotates in the rolling outer ring, and a reinforcement column is fixed between the rotating parts; a guard plate is fixedly connected to the side wall on one side of the reinforcement column, and an adjustment plate is fixedly connected to the side wall on the other side; an adjustment fastener is installed along the edge line of the adjustment plate surface, and the adjustment fastener is embedded with the upper buckle head.

5. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 4 is characterized in that: Arc holes are opened on the side walls of the guard plate and the adjustment plate, and multiple balls are arranged on both sides of the adjustment plate and the guard plate, and the balls roll on the inner wall of the cofferdam structure.

6. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 1 is characterized in that: The reinforcement assembly comprises two wheel rods which are fixedly connected to the reinforcement column. A pulley is installed at the connection between the two wheel rods, and the pulley is tangent to the outer wall of the casing.

7. The tidal impact marine environment high-level assembly low-water level bottom sealing steel cofferdam according to claim 1 is characterized in that: The rotating assembly includes a rotating rod, which is connected through the reinforcement column, and gears are fixedly connected at both ends of the rotating rod. The driving assembly includes a hydraulic seat, which is fixedly connected to the outer wall above the guide rail of the cofferdam structure, and a two-way electric hydraulic rod is passed through the hydraulic seat, and gear rods are fixedly connected at both ends of the two-way electric hydraulic rods, which mesh with gears, and a guide wheel is fixed at the bottom of the gear rod, and the guide wheel slides on the guide rail.

8. The construction method of tidal-affected marine environment high-level assembly low-water-level bottom-sealing steel cofferdam according to claim 1 is characterized in that: The steps include: S1. Weld the assembled bracket on the casing above the high water level and hoist the bottom of the cofferdam assembly onto the assembled bracket; S2. After the cofferdam side plates are assembled into a whole, the hanging equipment is installed on the casing, and the cofferdam structure is hoisted a certain distance and leveled by the hanging equipment. The cofferdam bottom plate is cut off and the corbel is assembled, and then the cofferdam structure is slowly lowered to the designed elevation; S3. During waterproofing operation, the driving component is engaged with the rotating component through gears to form a whole with the side protection component and the adjustable protection and reinforcement component to cap the cofferdam structure; S4. When the water flows into the capping part, the water will be discharged into the water collecting bucket and the liquid will be discharged when drainage is required.

9. The construction method of high-level assembly of low-water-level bottom-sealing steel cofferdams in a tidal marine environment according to claim 8 is characterized in that: In step S3, the side protection assembly includes a side plate, which is fixedly installed on the inner wall of the cofferdam assembly; a guard plate is fixedly connected to the side wall on one side of the reinforcement column, and an adjustment plate is fixedly connected to the side wall on the other side; an adjustment clip is installed along the edge line of the adjustment plate surface, and the adjustment clip is engaged with the upper buckle head; the rotating assembly includes a rotating rod, which is connected through the reinforcement column, and gears are fixedly connected at both ends of the rotating rod; the driving assembly includes a hydraulic seat, which is fixedly connected to the outer wall above the guide rail of the cofferdam structure, and a bidirectional electric hydraulic rod is passed through the hydraulic seat, and gear rods are fixedly connected at both ends of the bidirectional electric hydraulic rod, and the gear rods are meshed with the gears.

10. The construction method of high-level assembly of low-water-level bottom-sealing steel cofferdams in a tidal marine environment according to claim 9 is characterized by: In step S3, the gear rod is driven to move by a dual-axis electric hydraulic rod, and the gear rod is transmitted with a gear, so that the gear drives the rotating rod and the reinforcement column to rotate, and the reinforcement column drives the adjustment plate and the guard plate to rotate, so that the adjustment plate drives the adjustment buckle to engage with the fixed buckle head, so that the adjustment plate and the side plate are docked on the casing, and the two guard plates are docked on the casing in the same way, so that the adjustment plate, the side plate and the guard plate form an overall plane to cap the cofferdam structure.

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