Duplex circle type steel hanging box cofferdam

Abstract

The utility model belongs to the technical field of hanging box cofferdam construction, and particularly relates to a duplex circle type steel hanging box cofferdam which comprises a cofferdam body, and the cofferdam body comprises two first arc-shaped sections which are symmetrically arranged at intervals in the left-right direction and two second arc-shaped sections which are symmetrically arranged between the two first arc-shaped sections in the front-back direction. The inner support connecting systems are arranged in the cofferdam body in the length direction of the cofferdam body at intervals up and down, and the two ends of the inner support connecting systems are fixed to the inner walls of the second arc-shaped sections at the corresponding positions of the cofferdam body. The arc-shaped section of the cofferdam body can guide flow, so that the cofferdam body is stressed in a balanced mode, the influence of water flow on the cofferdam is reduced, and the cofferdam can be suitable for construction in water areas with rapid and deep water flow; in addition, the inner support connecting system can further enhance the water flow resistance of the cofferdam body, and meanwhile, the space occupied by the inner support connecting system is reduced, so that a large construction space can be formed in the cofferdam body, and construction of straining beams between pier columns is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of cofferdam construction for suspension boxes, and particularly relates to a double-connected circular steel cofferdam for suspension boxes. Background Technique

[0002] When constructing a bridge on the water surface, sometimes two pier columns are symmetrically and spacedly arranged at multiple positions at the bottom of the bridge, and the pier columns support the bridge. In order to make the erected bridge more stable, a tie beam connecting the two pier columns is usually arranged between the two symmetrically arranged pier columns. However, since the bottom ends of the pier columns are located in the water, it is difficult and inconvenient to construct the tie beam in the water. In the prior art, a cofferdam is mostly constructed at the position corresponding to the pier column, and an anhydrous construction environment is formed around the pier column by means of the cofferdam.

[0003] In the prior art, the cofferdam is mostly a rectangular cofferdam. Although this kind of cofferdam can provide an anhydrous construction environment, when constructing this rectangular cofferdam, a large number of internal supports are required, and the surrounding water flow will also have a great impact on the rectangular cofferdam, affecting the stability of the cofferdam. Of course, other-shaped cofferdams are also disclosed in the prior art. For example, a double-wall steel cofferdam structure disclosed in CN219710357U includes: a plurality of cofferdam structures, each of the cofferdam structures is annular, the plurality of cofferdam structures are stacked along the vertical direction, and any two adjacent cofferdam structures are fixedly connected; the bottom of the lowermost cofferdam structure is closed, and its top is open, and the tops and bottoms of the remaining cofferdam structures are through. It is undeniable that the cofferdam with two ends being arc-shaped disclosed in this patent can effectively solve the problems existing in the rectangular cofferdam, but this kind of cofferdam has a large volume, and a steel casing and a guiding structure need to be constructed during construction, the construction is cumbersome, and the steel casing occupies most of the space of the cofferdam, and it is not suitable for the construction of the tie beam of the pier column.

[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a double-connected circular steel cofferdam for suspension boxes to solve the problems existing in the double-wall steel cofferdam structure in the background art.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A double-connected circular steel cofferdam for suspension boxes, comprising:

[0008] The cofferdam body, the cofferdam body includes two first arc segments symmetrically arranged at intervals left and right and two second arc segments symmetrically arranged before and after between the two first arc segments, and each of the second arc segments is fixed between one ends of the two first arc segments; wherein, the convex directions of the two first arc segments are away from each other, and the convex directions of the two second arc segments are close to each other;

[0009] A plurality of internal support connection systems arranged at intervals up and down along the length direction of the cofferdam body inside the cofferdam body, and both ends of the internal support connection system are fixed on the inner walls of the second arc segments at corresponding positions of the cofferdam body; the internal support connection system includes an internal support steel pipe, vertical connecting plates symmetrically welded to both ends of the internal support steel pipe, and fixing seats welded to the outer sides of the connecting plates.

[0010] Preferably, a plurality of reinforcing plates evenly distributed along the circumferential direction of the internal support steel pipe are welded to both ends of the internal support steel pipe, and one end of the reinforcing plate close to the connecting plate is welded to the connecting plate.

[0011] Preferably, the fixing seat includes a vertical fixing plate welded to the connecting plate and a plurality of horizontal stiffening plates and vertical stiffening plates welded to the side of the fixing plate away from the connecting plate, and the plurality of horizontal stiffening plates and the plurality of vertical stiffening plates are perpendicularly and cross-welded to each other.

[0012] Preferably, wing plates are integrally formed at both ends of the horizontal stiffening plate, and one section of the wing plate close to the second arc segment gradually becomes larger and is welded to the inner wall of the second arc segment in a fitting manner.

[0013] Preferably, one ends of the plurality of horizontal stiffening plates and the vertical stiffening plates close to the second arc segment are welded to the inner wall of the second arc segment in a fitting manner.

[0014] Preferably, at least four of the internal support connection systems are arranged at intervals up and down.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The cofferdam body of the utility model includes two first arc segments with convex directions away from each other and two second arc segments with convex directions close to each other. The arc segments can conduct the flow of water, so that the stress of the cofferdam body is balanced, reducing the influence of water flow on the cofferdam, and it can be applied to the construction in waters with rapid and deep water flow; in addition, both ends of the internal support connection system are fixed on the second arc segment, which can further enhance the anti-water flow ability of the cofferdam body. At the same time, the space occupied by the internal support connection system is reduced, so that a larger construction space can be formed inside the cofferdam body, which is convenient for the construction of the cross beam between the piers. Description of the Drawings

[0017] Figure 1Schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is the sectional view along Figure 1 at the 1-1 position in [the figure];

[0019] Figure 3 is Figure 2 the enlarged view at position A in [the figure];

[0020] Figure 4 is the sectional view along Figure 1 at the 2-2 position in [the figure];

[0021] Figure 5 is Figure 4 the enlarged view at position B in [the figure].

[0022] Description of main reference numerals:

[0023] 1. Cofferdam body; 11. First arc section; 12. Second arc section;

[0024] 2. Internal support connection system; 21. Internal support steel pipe; 211. Reinforcing plate; 22. Connecting plate; 23. Fixed seat; 231. Fixed plate; 232. Transverse stiffening plate; 233. Vertical stiffening plate; 234. Wing plate;

[0025] 3. Pier column; 31. Cross beam;

[0026] 4. Stratum. Detailed implementation manners

[0027] The technical solutions of the patent of the present utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment

[0029] Referring to the attached Figures 1-5 , a double - circular steel suspension cofferdam includes:

[0030] A cofferdam body 1, the cofferdam body 1 includes 2 first arc sections 11 symmetrically arranged at intervals left and right, and 2 second arc sections 12 symmetrically arranged before and after between the 2 first arc sections 11, and each second arc section 12 is fixed between one ends of the 2 first arc sections 11; wherein, the protruding directions of the 2 first arc sections 11 are away from each other, and the protruding directions of the 2 second arc sections 12 are close to each other;

[0031] A plurality of internal support connection systems 2 are arranged at intervals up and down along the length direction of the cofferdam body 1 inside the cofferdam body 1. At least 4 internal support connection systems 2 are arranged at intervals up and down. Both ends of the internal support connection system 2 are fixed on the inner wall of the second arc section 12 at the corresponding positions of the cofferdam body 1. The internal support connection system 2 includes an internal support steel pipe 21, vertical connection plates 22 symmetrically welded to both ends of the internal support steel pipe 21, and fixing seats 23 welded to the outer sides of the connection plates 22. In this embodiment, a plurality of reinforcing plates 211 evenly distributed along the circumference are welded to both ends of the internal support steel pipe 21, and one end of the reinforcing plate 211 close to the connection plate 22 is welded to the connection plate 22.

[0032] In this embodiment, the specific structure of the fixing seat 23 is: the fixing seat 23 includes a vertical fixing plate 231 welded to the connection plate 22, and a plurality of horizontal stiffening plates 232 and vertical stiffening plates 233 welded to the side of the fixing plate 231 away from the connection plate 22, and the plurality of horizontal stiffening plates 232 and the plurality of vertical stiffening plates 233 are perpendicularly cross-welded to each other. In addition, in order to improve the firmness of the connection between the internal support connection system 2 and the second arc section 12 of the cofferdam body 1, wing plates 234 are integrally formed at both ends of the horizontal stiffening plate 232, and one section of the wing plate 234 close to the second arc section 12 gradually becomes larger and is welded to the inner wall of the second arc section 12 in a fitting manner; preferably, one end of the plurality of horizontal stiffening plates 232 and the vertical stiffening plates 233 close to the second arc section 12 is welded to the inner wall of the second arc section 12 in a fitting manner.

[0033] When constructing the pier column 3, according to the specific situation between the two pier columns 3 and the size of the pier column 3, the double-connected circular steel suspension cofferdam in this embodiment is welded. It should be supplemented here that the center 11 of the first arc section basically coincides with the center of the pier column 3. Then, with the help of external equipment, the welded double-connected circular steel suspension cofferdam is hoisted and lowered outside the two pier columns 3. Then, the water inside the cofferdam body 1 is pumped out to form a water-free construction environment inside the cofferdam body 1, and the cross beam 31 can be constructed between the two pier columns 3 according to the design.

[0034] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A double circular steel hanging box cofferdam, characterized in that: include: A cofferdam body, the cofferdam body comprising two first arc segments symmetrically arranged at intervals on the left and right and two second arc segments symmetrically arranged between the two first arc segments, and each of the second arc segments is fixed between one end of the two first arc segments; wherein the convex directions of the two first arc segments are away from each other, and the convex directions of the two second arc segments are close to each other; A plurality of internal support connection systems are arranged in the cofferdam body at intervals up and down along the length direction of the cofferdam body, and both ends of the internal support connection system are fixed on the inner wall of the second arc segment at the corresponding position of the cofferdam body; the internal support connection system includes an internal support steel pipe, vertical connection plates symmetrically welded to the two ends of the internal support steel pipe, and a fixing seat welded to the outside of the connection plate.

2. The double circular steel hanging box cofferdam according to claim 1 is characterized in that: A plurality of reinforcing plates evenly distributed along the circumference of the inner supporting steel pipe are welded at both ends thereof, and the connecting plate is welded at one end of the reinforcing plate close to the connecting plate.

3. The double circular steel hanging box cofferdam according to claim 1 is characterized in that: The fixing seat includes a vertical fixing plate welded to the connecting plate and a plurality of transverse stiffening plates and vertical stiffening plates welded to a side of the fixing plate away from the connecting plate, and the plurality of transverse stiffening plates and the plurality of vertical stiffening plates are mutually cross-welded.

4. The double circular steel hanging box cofferdam according to claim 3 is characterized in that: Both ends of the transverse stiffening plate are respectively integrally formed with wing plates, and a section of the wing plate close to the second arc segment gradually becomes larger and is welded to the inner wall of the second arc segment.

5. The double circular steel hanging box cofferdam according to claim 3 is characterized in that: A plurality of transverse stiffening plates and vertical stiffening plates are welded to the inner wall of the second arc segment at one end close to the second arc segment.

6. The double circular steel hanging box cofferdam according to claim 1 is characterized in that: The inner support connection system is provided with at least 4 at intervals in the upper and lower parts.

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