A reusable multifunctional deepwater steel cofferdam

Abstract

The utility model discloses a kind of reusable multifunctional deepwater steel cofferdams, belong to hydraulic engineering technical field, the utility model includes steel cofferdam whole, steel cofferdam whole includes upper section cofferdam and lower section cofferdam, upper section cofferdam is arranged at the top end of lower section cofferdam, the bottom end of upper section cofferdam is provided with arc locating block, the top end of lower section cofferdam is provided with arc locating groove, arc locating block is matched with arc locating groove, the bottom end inboard of upper section cofferdam is provided with a plurality of thread sleeve one, and thread sleeve one is matched with fastening bolt in, the top end inboard of lower section cofferdam is provided with a plurality of thread sleeve two, and the bottom end outer surface of fastening bolt is matched with the inner ring of thread sleeve two, the utility model can conveniently separate each section cofferdam by detachable mechanical connection design, guarantee the integrity of each section structure and original performance, solve the problem that separation of welding position becomes very difficult when cofferdam needs to be removed for repeated use.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to a reusable multifunctional deep-water steel cofferdam. Background Technology

[0002] Underwater construction has always been a difficult problem in water conservancy construction. When the working gates of a hydropower station encounter flood discharge, in order to ensure the normal opening and closing of the working gates, it is necessary to add maintenance gates in front of the five flood discharge gates of the hydropower station so as to maintain and repair the working gates in a timely manner and ensure their normal operation. Therefore, it is necessary to add maintenance gates to the surface gates of the hydropower station. The addition of maintenance gates is achieved by using underwater installation and sealing of steel cofferdams. In deep-water water conservancy construction, steel cofferdams are a common temporary water-retaining structure, which provides key guarantees for dry construction of underwater foundation pits. In order to adapt to different water depth conditions and facilitate transportation and installation, deep-water steel cofferdams are often designed as multi-segment structures and spliced ​​on the construction site.

[0003] Currently, to ensure that multi-segment cofferdams have sufficient overall rigidity and excellent sealing performance in deep water environments, the common practice is to weld the edges of adjacent segments together on-site and supplement them with sealing materials. While this welding connection method can effectively guarantee the integrity and water-stopping effect of the structure under water pressure, the separation of the welded parts becomes very difficult when the cofferdam needs to be dismantled for reuse after the project is completed. This not only consumes a lot of manpower and time for cutting, but may also damage the parent material, affecting the integrity and original performance of the steel cofferdam structure, thus significantly reducing its economic value and practicality for recycling. Utility Model Content

[0004] The purpose of this invention is to provide a reusable, multifunctional deep-water steel cofferdam. Through a detachable mechanical connection design, each section of the cofferdam can be easily separated, ensuring the integrity and original performance of each segment. This solves the problem that separating the welded parts becomes very difficult when the cofferdam needs to be dismantled for reuse.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model is a reusable multifunctional deep-water steel cofferdam, including an overall steel cofferdam, which includes an upper cofferdam section and a lower cofferdam section, with the upper cofferdam section located at the top of the lower cofferdam section.

[0007] The bottom of the upper section of the cofferdam is equipped with an arc-shaped positioning block, and the top of the lower section of the cofferdam is equipped with an arc-shaped positioning groove. The arc-shaped positioning block and the arc-shaped positioning groove are matched. Multiple threaded sleeves are provided on the inner side of the bottom of the upper section of the cofferdam, and fastening bolts are fitted inside the threaded sleeves. Multiple threaded sleeves are provided on the inner side of the top of the lower section of the cofferdam, and the outer surface of the bottom end of the fastening bolt is matched with the inner ring of the threaded sleeve.

[0008] Furthermore, an arc-shaped sealing gasket is fitted inside the arc-shaped positioning groove, and the bottom surface of the arc-shaped positioning block mates with the arc-shaped sealing gasket.

[0009] Furthermore, inserts are provided on both sides of the bottom of the upper section of the cofferdam, and slots are provided on both sides of the top of the lower section of the cofferdam, with the inserts and slots fitting together.

[0010] Furthermore, three pins are installed on the outer side of the bottom end of the upper section of the cofferdam, and three fixed columns are installed on the outer side of the top end of the lower section of the cofferdam. The fixed columns have pin holes, and the pins are engaged with the pin holes.

[0011] Furthermore, multiple horizontal and vertical ribs are provided on the inner sides of both the upper and lower cofferdam sections. The horizontal and vertical ribs are welded alternately to the inner surfaces of the upper and lower cofferdam sections. Multiple figure-eight supports are provided inside both the upper and lower cofferdam sections. The figure-eight supports are made of two 16# I-beams hinged together.

[0012] Furthermore, two lifting lugs and two suspension lugs are welded to the outer top of both the upper and lower cofferdam sections, and an adjusting lug is welded to the middle of the outer bottom of the lower cofferdam section.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model adopts a modular, detachable mechanical connection design. The upper and lower sections of the cofferdam are quickly and accurately aligned through the cooperation of arc-shaped positioning blocks and arc-shaped positioning grooves. The multiple mechanical fastening methods, including fastening bolts, inserts and slots, and pins and fixing columns, replace the traditional welding connection. After the project is completed, the sections of the cofferdam can be easily separated by simple reverse operation. This ensures that the cofferdam parent material is not damaged by cutting operations during the entire construction process, and guarantees the integrity and original performance of each section structure. The cofferdam components after this disassembly and assembly only require simple maintenance before being put into subsequent projects, which greatly increases the turnover of materials and reduces the cost and waste of resources from repeated manufacturing.

[0015] 2. This utility model, through comprehensive structural reinforcement, forms a strong reinforcing grid by staggered horizontal and vertical ribs on the inner side of the steel cofferdam. Combined with the V-shaped support members made of H-beams, it forms an efficient spatial force-bearing system that can evenly distribute and effectively resist huge water and soil pressures, preventing structural instability and excessive deformation. This reduces the technical risks of underwater construction and broadens its application scope in high-standard projects such as hydropower station maintenance.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall assembly structure of the steel cofferdam.

[0018] Figure 2 This is a schematic diagram of the overall structure of the steel cofferdam.

[0019] Figure 3 This is a schematic diagram of the overall top structure of the steel cofferdam.

[0020] Figure 4 This is a schematic diagram of the cofferdam structure in the previous section.

[0021] Figure 5 This is a schematic diagram of the installation structure of the upper section of the cofferdam.

[0022] In the diagram: 1. Overall steel cofferdam; 2. Upper cofferdam section; 201. Insert plate; 3. Lower cofferdam section; 301. Arc-shaped positioning groove; 302. Slot; 303. Adjusting lug; 4. Arc-shaped positioning block; 5. Threaded sleeve one; 501. Fastening bolt; 6. Threaded sleeve two; 7. Arc-shaped sealing gasket; 8. Pin rod; 9. Fixing column; 10. Horizontal rib plate; 11. Vertical rib plate; 12. V-shaped support. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a reusable multifunctional deep-water steel cofferdam, comprising a steel cofferdam assembly 1, which includes an upper cofferdam 2 and a lower cofferdam 3. The upper cofferdam 2 is located at the top of the lower cofferdam 3. Multiple horizontal ribs 10 and vertical ribs 11 are provided on the inner sides of both the upper and lower cofferdam 2 and 3. The horizontal ribs 10 and vertical ribs 11 are staggered and welded to the inner surfaces of the upper and lower cofferdam 3, ensuring uniform stress distribution between the upper and lower cofferdam 2 and 3, and guaranteeing the strength and safety factor of the steel cofferdam assembly 1. The upper section of the cofferdam 2 and the lower section of the cofferdam 3 have a panel thickness of 12mm, a horizontal rib plate 10 with a height of 150mm and a web thickness of 12mm, a spacing of 500mm between two adjacent horizontal rib plates 10, and a vertical rib plate 11 with a thickness of 12mm. Both the upper section of the cofferdam 2 and the lower section of the cofferdam 3 are equipped with multiple V-shaped supports 12. The V-shaped supports 12 are made of two 16# I-beams hinged together. The ends of the 16# I-beams are hinged to the inner surfaces of the upper section of the cofferdam 2 and the lower section of the cofferdam 3, which can further ensure the structural rigidity and stability of the steel cofferdam as a whole 1.

[0025] An arc-shaped positioning block 4 is provided at the bottom of the upper cofferdam 2, and an arc-shaped positioning groove 301 is provided at the top of the lower cofferdam 3. The arc-shaped positioning block 4 cooperates with the arc-shaped positioning groove 301, and an arc-shaped sealing gasket 7 is fitted inside the arc-shaped positioning groove 301. The bottom surface of the arc-shaped positioning block 4 cooperates with the arc-shaped sealing gasket 7, which can ensure the sealing between the upper cofferdam 2 and the lower cofferdam 3. The cross-sections of the arc-shaped positioning block 4, the arc-shaped positioning groove 301, and the arc-shaped sealing gasket 7 are all "W" shaped. This design effectively improves the sealing connection between the upper cofferdam 2 and the lower cofferdam 3. Multiple threaded sleeves 5 are installed on the inner side of the bottom end of the upper cofferdam 2, with fastening bolts 501 fitted inside each threaded sleeve. Multiple threaded sleeves 6 are installed on the inner side of the top end of the lower cofferdam 3, with the outer surface of the bottom end of the fastening bolts 501 engaging with the inner ring of the threaded sleeves 6. Inserts 201 are installed on both sides of the bottom end of the upper cofferdam 2, and slots 302 are opened on both sides of the top end of the lower cofferdam 3. The insert 201 and slot 302 work together to ensure a precise connection between the upper cofferdam 2 and the lower cofferdam 3, improving the stability of the connection. Three pins 8 are provided on the outer bottom of the upper cofferdam 2, and three fixing columns 9 are provided on the outer top of the lower cofferdam 3. Pin holes are provided on the fixing columns 9, and the pins 8 work with the pin holes to ensure the rigidity of the steel cofferdam 1. Two lifting lugs and two suspension lugs are welded to the outer top of both the upper cofferdam 2 and the lower cofferdam 3 to facilitate the hoisting and installation of the upper cofferdam 2 and the lower cofferdam 3. An adjusting lug 303 is welded to the middle position of the outer bottom of the lower cofferdam 3 to facilitate the adjustment of the vertical angle of the lower cofferdam 3. Assembly plates are provided on both sides of the upper cofferdam 2 and the lower cofferdam 3, and side water seals are provided on the surface of the assembly plates. A bottom water seal is provided at the bottom of the lower cofferdam 3 to achieve overall sealing of the steel cofferdam 1 during underwater installation.

[0026] At the site where underwater construction is required, the upper cofferdam 2 and the lower cofferdam 3 are first hoisted to their designed positions one by one. Then, the upper cofferdam 2 is hoisted, and the upper cofferdam 2 and the lower cofferdam 3 are initially aligned by the cooperation of the arc-shaped positioning block 4 and the arc-shaped positioning groove 301. At the same time, the arc-shaped positioning block 4 compresses the arc-shaped sealing gasket 7 in the arc-shaped positioning groove 301 to form the first seal. Next, the operators enter the inner connection between the upper cofferdam 2 and the lower cofferdam 3, which has been initially sealed, and use special tools to tighten all the fastening bolts 501 connecting the upper cofferdam 2 and the lower cofferdam 3 in sequence, so that the two are mechanically fixed together. The cooperation of the insert 201 and the slot 302 and the pin 8 The insertion of the fixed column 9 further enhances the shear and overturning resistance of the connection node. Similarly, when disassembling the entire steel cofferdam 1, the above operation is repeated in the reverse order to achieve convenient separation between the upper cofferdam 2 and the lower cofferdam 3. Since the connection method is a detachable mechanical connection, the entire process will not cause damage to the cofferdam parent material as it would to cutting welding points. Each section of the cofferdam structure is intact. After simple inspection and maintenance, it can be transported to the next construction site for reuse, which greatly improves the turnover rate of materials and reduces project costs. This design is particularly suitable for scenarios such as the installation of maintenance gates in hydropower stations that require the rapid construction and dismantling of temporary water-retaining structures.

[0027] During the underwater use of the steel cofferdam 1, the intersecting horizontal ribs 10, vertical ribs 11, and V-shaped supports 12 inside the upper cofferdam 2 and the lower cofferdam 3 work together to ensure that the steel cofferdam 1 has sufficient strength and rigidity when subjected to huge water pressure and soil pressure, and avoids instability or excessive deformation.

[0028] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A reusable, multifunctional deep-water steel cofferdam, comprising an integral steel cofferdam (1), characterized in that: The steel cofferdam as a whole (1) includes an upper cofferdam (2) and a lower cofferdam (3), wherein the upper cofferdam (2) is located at the top of the lower cofferdam (3); The bottom end of the upper section of the cofferdam (2) is provided with an arc-shaped positioning block (4), and the top end of the lower section of the cofferdam (3) is provided with an arc-shaped positioning groove (301). The arc-shaped positioning block (4) cooperates with the arc-shaped positioning groove (301). Multiple threaded sleeves (5) are provided on the inner side of the bottom end of the upper section of the cofferdam (2). Fastening bolts (501) are fitted inside the threaded sleeves (5). Multiple threaded sleeves (6) are provided on the inner side of the top end of the lower section of the cofferdam (3). The outer surface of the bottom end of the fastening bolt (501) cooperates with the inner ring of the threaded sleeves (6).

2. The reusable multifunctional deep-water steel cofferdam according to claim 1, characterized in that, An arc-shaped sealing gasket (7) is fitted inside the arc-shaped positioning groove (301), and the bottom surface of the arc-shaped positioning block (4) fits with the arc-shaped sealing gasket (7).

3. The reusable multifunctional deep-water steel cofferdam according to claim 1, characterized in that, The upper section of the cofferdam (2) has inserts (201) on both sides of its bottom end, and the lower section of the cofferdam (3) has slots (302) on both sides of its top end. The inserts (201) and slots (302) are engaged.

4. A reusable, multifunctional deep-water steel cofferdam according to claim 3, characterized in that, Three pins (8) are provided on the outer side of the bottom end of the upper section cofferdam (2), and three fixed columns (9) are provided on the outer side of the top end of the lower section cofferdam (3). The fixed columns (9) are provided with pin holes, and the pins (8) cooperate with the pin holes.

5. A reusable multifunctional deep-water steel cofferdam according to any one of claims 1-4, characterized in that, The inner sides of the upper cofferdam (2) and the lower cofferdam (3) are provided with multiple horizontal ribs (10) and vertical ribs (11). The horizontal ribs (10) and vertical ribs (11) are welded alternately to the inner surfaces of the upper cofferdam (2) and the lower cofferdam (3). The upper cofferdam (2) and the lower cofferdam (3) are provided with multiple figure-eight supports (12). The figure-eight supports (12) are made of two 16# I-beams hinged together.

6. A reusable, multifunctional deep-water steel cofferdam according to claim 5, characterized in that, The top outer sides of both the upper section cofferdam (2) and the lower section cofferdam (3) are welded with two lifting lugs and two suspension lugs, and the middle position of the bottom outer side of the lower section cofferdam (3) is welded with an adjusting lug (303).

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