Deepwater foundation combined steel sheet pile cofferdam construction device

Abstract

The utility model relates to the technical field of cofferdam devices, in particular to a deepwater foundation combined type steel sheet pile cofferdam construction device which comprises Larsen steel sheet piles and further comprises a steel jacket box mechanism arranged on one side of the Larsen steel sheet piles and used for forming a cofferdam. The buffering mechanism is arranged on one side of the Larsen steel sheet pile and used for buffering the impact of water flow on the cofferdam; the inner supporting assemblies are arranged on the inner sides of the first side plate and the second side plate and used for reinforcing the structural strength of the steel jacket box. The problems that in the using process of an existing deepwater foundation combined steel sheet pile cofferdam construction device, steel jacket boxes are usually assembled in a welding mode, the steps are tedious, meanwhile, disassembly is inconvenient, the construction period is greatly prolonged, rapid water flow cannot be prevented from continuously impacting the cofferdam, the stability of the cofferdam structure is damaged, and the construction cost is low are solved. And cofferdam components cannot be recycled in other construction projects, so that the waste of material resources is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cofferdam devices, in particular to a deep-water foundation combined steel sheet pile cofferdam construction device. Background Art

[0002] In bridge construction, deepwater foundation construction is a vital part of bridge engineering construction, and in deepwater foundation construction, steel cofferdam construction technology plays an important role. However, due to the difficulty, long construction period and low safety factor in deepwater environment, bridge construction still faces many problems. The flow rate in the river is slow, the water level is deep, the sand and gravel cover is thick, and the presence of rock layers increases the difficulty of embedding the cofferdam. These objective geological and hydrological conditions are great challenges for deepwater foundation construction in bridge construction, and are also one of the current exploration and research directions of scientific researchers in deepwater foundation construction technology.

[0003] Compared with the traditional cofferdam construction method, the use of single-arm bottomless steel casing reduces the amount of earth excavation and backfilling, and reduces damage to the environment. In addition, its reusability also reduces construction costs and meets the requirements of environmental protection and energy conservation. During the use of the existing deep-water foundation combined steel sheet pile cofferdam construction device, the steel casing is usually assembled by welding, which has cumbersome steps and is not easy to disassemble, greatly prolonging the construction period, and cannot prevent the turbulent water flow from constantly impacting the cofferdam, which destroys the stability of the cofferdam structure, and the cofferdam components cannot be recycled in other construction projects, increasing the waste of material resources. Utility Model Content

[0004] The utility model aims to provide a deep-water foundation combined steel sheet pile cofferdam construction device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a deep-water foundation combined steel sheet pile cofferdam construction device, including Larsen steel sheet piles, and also including: a steel casing mechanism arranged on one side of the Larsen steel sheet pile for forming a cofferdam, the steel casing mechanism including a first side plate arranged on one side of the Larsen steel sheet pile, a second side plate arranged on one side of the first side plate, a splicing piece arranged on one side of the first side plate and the second side plate, and a mounting plate fixedly connected to the other side of the first side plate and the second side plate; a buffer mechanism arranged on one side of the Larsen steel sheet pile for buffering the impact of water flow on the cofferdam, the buffer mechanism including a buffer member fixed on one side of the Larsen steel sheet pile, a buffer shield fixedly connected to one side of the buffer member; an inner support assembly arranged on the inner side of the first side plate and the second side plate for strengthening the structural strength of the steel casing; a bottom sealing concrete beam is arranged on the inner bottom of the steel casing mechanism, a cap is arranged on the inner side of the bottom sealing concrete beam, and a rock and soil layer is fixedly connected to the bottom of the Larsen steel sheet pile.

[0006] Preferably, the splicing piece includes a first connecting block fixed to one side of the first side plate, a sealing groove opened on one side of the first connecting block, and a clamping groove fixed to one side of the first connecting block.

[0007] Preferably, the splicing piece further includes a second connecting block fixed to one side of the second side plate, and a clamping block clamped to the inner side of the clamping slot.

[0008] Preferably, the buffer member includes a fixing seat fixed to one side of the Larsen steel sheet pile, and a bolt arranged on one side of the fixing seat.

[0009] Preferably, the buffer component further includes a fixing block clamped on the inner side of the fixing seat, and a damping rod arranged on one side of the fixing block.

[0010] Preferably, the buffer member further includes a spring sleeved on the outside of the damping rod, and a connecting plate fixed to the other end of the damping rod.

[0011] Preferably, the inner support assembly includes a steel purlin fixed to the inner side of the steel casing mechanism, and a corbel beam arranged on the inner side of the steel purlin.

[0012] Preferably, the inner support assembly also includes a connecting seat fixed to one end of the corbel beam, and a bracing rod fixed to the inner side of the steel purlin.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model realizes the remarkable characteristics of low investment in large-scale mechanical equipment, high construction safety, convenient, quick and time-saving installation and dismantling of the steel casing cofferdam, and multiple turnover use by arranging a steel casing mechanism. By arranging a buffer mechanism, the impact of water flow on the cofferdam structure is mitigated, and the stability of the cofferdam structure is improved. By arranging Larsen steel plate columns and single-wall steel casings, they can be recycled in multiple construction projects, saving construction time and improving work efficiency. The use of materials such as concrete and wood can be reduced, and the generation of waste can be reduced. The amount of steel used is reduced, and the construction cost is reduced. The grooving process is reduced, and the bottom sealing concrete and excavation volume are reduced. The damage to the natural environment is reduced, land excavation and vegetation damage are reduced, and the integrity of the ecosystem is protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a preferred embodiment of a deep-water foundation combined steel sheet pile cofferdam construction device provided by the utility model;

[0016] Figure 2 A schematic diagram of the top structure of the device provided by the utility model;

[0017] Figure 3 This is a schematic diagram of the steel casing mechanism structure provided by the utility model;

[0018] Figure 4 A schematic diagram of the structure of the buffer mechanism provided by the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the inner support assembly provided by the utility model;

[0020] Figure 6 This is a schematic diagram of the back structure of the Larsen steel sheet pile provided by the utility model.

[0021] In the figure: 1. Larsen steel sheet pile; 2. Steel casing mechanism; 21. First side plate; 22. Second side plate; 23. Splicing piece; 231. First connecting block; 232. Sealing groove; 233. Clamping groove; 234. Second connecting block; 235. Clamping block; 24. Mounting plate; 3. Buffer mechanism; 31. Buffer piece; 311. Fixed seat; 312. Bolt; 313. Fixed block; 314. Damping rod; 315. Spring; 316. Connecting plate; 32. Buffer shield; 4. Internal support assembly; 41. Steel purlin; 42. Corbel beam; 43. Connecting seat; 44. Bracing rod; 5. Bottom concrete surrounding beam; 6. Capping platform; 7. Geotechnical layer. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] See also Figure 1-6 As shown, a deep-water foundation combined steel sheet pile cofferdam construction device includes a Larsen steel sheet pile 1, and also includes: a steel casing mechanism 2 arranged on one side of the Larsen steel sheet pile 1 for forming a cofferdam, the steel casing mechanism 2 includes a first side plate 21 arranged on one side of the Larsen steel sheet pile 1, a second side plate 22 is arranged on one side of the first side plate 21, a splicing piece 23 is arranged on one side of the first side plate 21 and the second side plate 22, and a mounting plate 24 is fixedly connected to the other side of the first side plate 21 and the second side plate 22; a buffer mechanism 3 is arranged on one side of the Larsen steel sheet pile 1 for buffering the impact of water flow on the cofferdam, the buffer mechanism 3 includes a buffer member 31 fixed on one side of the Larsen steel sheet pile 1, and a buffer shield 32 is fixedly connected to one side of the buffer member 31; an inner support assembly 4 is arranged on the inner side of the first side plate 21 and the second side plate 22 for strengthening the strength of the steel casing structure; a bottom sealing concrete surrounding beam 5 is arranged on the inner bottom of the steel casing mechanism 2, a cap 6 is arranged on the inner side of the bottom sealing concrete surrounding beam 5, and a rock and soil layer 7 is fixedly connected to the bottom of the Larsen steel sheet pile 1.

[0024] refer to Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the splicing piece 23 includes a first connecting block 231 fixed to one side of the first side plate 21, a sealing groove 232 opened on one side of the first connecting block 231, and a clamping groove 233 fixed to one side of the first connecting block 231; the splicing piece 23 also includes a second connecting block 234 fixed to one side of the second side plate 22, and a clamping block 235 clamped to the inner side of the clamping groove 233; by providing the clamping groove 233 and the clamping block 235, it is convenient to assemble and connect the first side plate 21 and the second side plate 22, so as to form a single-wall bottomless steel casing. The sealing groove 232 is arranged to facilitate the injection of glue through the sealing groove 232 after the first side panel 21 and the second side panel 22 are assembled, so that the joints of the assembled steel casing are sealed and waterproof. The splicing piece 23 is arranged to facilitate the assembly and closure of the first side panel 21 and the second side panel 22. The sealing design of the joints of the side panels of the steel casing is simple and effective. In addition, the block-assembled single-wall bottomless steel casing also has the remarkable characteristics of low investment in large-scale machinery and equipment, high construction safety, convenient, fast and time-saving installation and dismantling of the steel casing cofferdam, and multiple turnover use.

[0025] refer to Figure 1 , Figure 2 and Figure 4 As shown, the buffer member 31 includes a fixing seat 311 fixed to one side of the Larsen steel sheet pile 1, and a bolt 312 arranged on one side of the fixing seat 311; the buffer member 31 also includes a fixing block 313 clamped on the inner side of the fixing seat 311, and a damping rod 314 arranged on one side of the fixing block 313; the buffer member 31 also includes a spring 315 sleeved on the outer side of the damping rod 314, and a connecting plate 316 fixed to the other end of the damping rod 314; by arranging the bolt 312, it is convenient to connect and fix the fixing seat 311 and the fixing block 313, by arranging the buffer shield 32, it is convenient to block the water flow, by arranging the damping rod 314 and the spring 315, it is convenient to support the buffer shield 32, thereby reducing the impact of the water flow on the cofferdam structure and improving the stability of the cofferdam structure.

[0026] refer to Figure 1 , Figure 2 and Figure 5 As shown, the inner support assembly 4 includes a steel purlin 41 fixed to the inner side of the steel casing mechanism 2, and a corbel beam 42 arranged on the inner side of the steel purlin 41; the inner support assembly 4 also includes a connecting seat 43 fixed to one end of the corbel beam 42, and a brace rod 44 fixed to the inner side of the steel purlin 41; by arranging the steel purlin 41, it is convenient to support the inner side of the steel casing after splicing is completed, and by arranging the corbel beam 42 and the brace rod 44, the structural strength of the steel purlin 41 is improved, and the stability of the cofferdam structure is strengthened.

[0027] Working principle: When in use, first determine the position and size of the steel casing at the construction site according to the design requirements, then connect the first connecting block 231 on the first side panel 21 and the second connecting block 234 on the second side panel 22 through the cooperation of the card slot 233 and the card block 235 to form a single-wall bottomless steel casing. After the assembly is completed, use a crane or other appropriate equipment to place the steel casing in a predetermined position to ensure verticality and horizontality. Then, fill the sealing groove 232 with glue to seal and stop the joints of the steel casing, ensure the sealing of the joints, and improve the waterproof performance of the cofferdam. After the single-wall bottomless steel casing is installed and fixed, use a vibrating hammer to install the Larsen steel sheet piles 1 one by one to ensure that the connection between the Larsen steel sheet piles 1 and the steel casing is firm, and reinforce it by using high-strength bolts. Before the installation process of the Larsen steel sheet piles 1, add transverse connectors inside the steel casing to enhance the stability and rigidity of the steel casing. The steel purlin 41 is welded to the inner side of the steel casing to provide support for the cofferdam. The corbel beam 42 and the support rod 44 enhance the structural strength of the steel purlin 41, so that it can better withstand external loads. After the overall reinforcement of the steel casing is completed, the inside of the cofferdam is drained and the bottom of the cofferdam is cleaned. A bottom concrete beam 5 is arranged inside the cofferdam to increase the stability of the maintenance structure. To ensure the strength, density, integrity and water tightness of the bottom concrete beam 5, the bottom concrete beam 5 must be poured uninterruptedly at one time, and then the construction of the pedestal 6 can be carried out. According to the design requirements, the concrete is poured and formed. When the water flow impacts the cofferdam, the buffer shield 32 first plays a blocking role. The combination of the damping rod 314 and the spring 315 can support the buffer shield 32, reduce the impact of the water flow on the cofferdam, and protect the stability of the cofferdam structure. This design significantly reduces the impact of the water flow on the cofferdam and improves the stability of the cofferdam.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A deepwater foundation combined steel sheet pile cofferdam construction device, comprising Larsen steel sheet piles (1), characterized in that: Also includes: A steel casing mechanism (2) is arranged on one side of a Larsen steel sheet pile (1) for forming a cofferdam, the steel casing mechanism (2) comprising a first side plate (21) arranged on one side of the Larsen steel sheet pile (1), a second side plate (22) being arranged on one side of the first side plate (21), a splicing piece (23) being arranged on one side of the first side plate (21) and the second side plate (22), and a mounting plate (24) being fixedly connected to the other side of the first side plate (21) and the second side plate (22); A buffer mechanism (3) is arranged on one side of the Larsen steel sheet pile (1) for buffering the impact of water flow on the cofferdam, the buffer mechanism (3) comprising a buffer member (31) fixed to one side of the Larsen steel sheet pile (1), and a buffer shield (32) is fixedly connected to one side of the buffer member (31); An inner support assembly (4) is arranged inside the first side plate (21) and the second side plate (22) for reinforcing the strength of the steel casing structure; a bottom sealing concrete beam (5) is arranged at the bottom inside the steel casing structure (2); a cap (6) is arranged inside the bottom sealing concrete beam (5); and a rock and soil layer (7) is fixedly connected to the bottom of the Larsen steel sheet pile (1).

2. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 1, characterized in that: The splicing piece (23) comprises a first connecting block (231) fixed to one side of the first side plate (21), a sealing groove (232) opened on one side of the first connecting block (231), and a clamping groove (233) fixed to one side of the first connecting block (231).

3. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 2, characterized in that: The splicing piece (23) further comprises a second connecting block (234) fixed to one side of the second side plate (22), and a clamping block (235) clamped to the inner side of the clamping slot (233).

4. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 1, characterized in that: The buffer member (31) comprises a fixing seat (311) fixed to one side of the Larsen steel sheet pile (1), and a bolt (312) arranged on one side of the fixing seat (311).

5. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 4, characterized in that: The buffer member (31) further comprises a fixing block (313) clamped on the inner side of the fixing seat (311), and a damping rod (314) arranged on one side of the fixing block (313).

6. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 4, characterized in that: The buffer member (31) further comprises a spring (315) sleeved on the outside of the damping rod (314), and a connecting plate (316) fixed to the other end of the damping rod (314).

7. The deepwater foundation combined steel sheet pile cofferdam construction device according to claim 1 is characterized by: The inner support assembly (4) comprises a steel purlin (41) fixed to the inner side of the steel casing mechanism (2), and a corbel beam (42) arranged on the inner side of the steel purlin (41).

8. A deepwater foundation combined steel sheet pile cofferdam construction device according to claim 7, characterized in that: The inner support assembly (4) further comprises a connecting seat (43) fixed to one end of the corbel beam (42), and a bracing rod (44) fixed to the inner side of the steel purlin (41).

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