Steel boxed cofferdam structure
By setting up suction barrel components in the steel coffin coffin structure, the problem of poor sinking and stability has been solved to solve the problem of poor and poor positioning and posture adjustment effects of steel coffin.
Patent Information
- Application Number
- CN202421105060.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the prior art, steel cofferdams have poor ability to withstand wave current loads and poor positioning and attitude adjustment effects.
Adopt the structure of steel coffin coffin, including the main body of the steel coffin and multiple suction barrel components. Anti -wave flow load capacity.
By controlling the power of the suction barrel component, adjust the sinking posture of the main body of the steel coffin, improve the capacity of its anti -wave flow load, ensure that it sinks to the high -end mud suction efficiency, and provide stable support on the river bed to avoid overturning.
Smart Images
Figure CN222413086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of offshore engineering foundations, in particular to a steel casing cofferdam structure. Background Art
[0002] The cofferdam structures commonly used in the construction of deep-water bridge pier foundations are lock-mouth steel pipe pile cofferdams and double-wall steel box cofferdams. Different cofferdam structures are selected according to different hydrological and meteorological conditions and geological conditions.
[0003] The lock-mouth steel pipe pile cofferdam is mainly composed of supporting steel pipe piles and locks. The steel pipe piles are connected by locks. The positioning accuracy and verticality of the steel pipe piles are high, and an additional insertion guide frame is required. At the same time, the integrity of the steel pipe pile cofferdam is poor, there is a gap between the locks, the water stop treatment is difficult, the ability to withstand wave and current loads is poor, and the application range is limited. The traditional double-walled steel box cofferdam needs to be lowered with the help of a lowering guide structure. The guide structure is complex, the amount of steel used is large, and the positioning and posture adjustment effects are poor. The mud suction efficiency of the cofferdam is low, the sinking speed is slow, and the accuracy is difficult to control when the cofferdam sinks. When the river flow rate is large and the riverbed is severely scoured, it is difficult to control the overall anti-overturning of the cofferdam, and the overall construction cost and construction risk are high.
[0004] After the underwater foundation construction of the above two cofferdams is completed, divers usually dive underwater to cut and divide the cofferdam below the riverbed, and then use a lifting device to lift it underwater to remove it. This method of removing double-wall steel cofferdams is expensive, inefficient and has great safety hazards. Utility Model Content
[0005] In view of the defects existing in the prior art, the purpose of the utility model is to provide a steel box cofferdam structure to solve the problems in the prior art that the steel cofferdam has poor ability to withstand wave and current loads and poor positioning and posture adjustment effects.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] The present application provides a steel box cofferdam structure, comprising:
[0008] A steel cofferdam body having a casting cavity for casting a cap;
[0009] A plurality of suction bucket assemblies are arranged at intervals along the circumference of the steel cofferdam body, and the suction bucket assemblies are used to provide power for the floating and sinking of the steel cofferdam body.
[0010] In some optional embodiments, the suction bucket assembly includes:
[0011] The barrel body has a water-permeable hole on its bottom wall;
[0012] The pumping and draining member is arranged in the barrel body and is used for pumping and draining the water in the barrel body.
[0013] In some optional embodiments, the suction bucket assembly is detachably connected to the steel cofferdam body.
[0014] In some optional embodiments, the suction bucket assembly further comprises a connecting joint, and a cofferdam corbel is provided on the outer wall of the steel cofferdam body, and the cofferdam corbel is detachably connected to the connecting joint via a connecting pin.
[0015] In some optional embodiments, the opening of the barrel body faces downward, and the connecting joint is arranged at the bottom of the barrel body.
[0016] In some optional embodiments, the steel cofferdam body comprises a plurality of wall panel blocks, and all of the wall panel blocks are detachably connected in sequence.
[0017] In some optional embodiments, the wall panel blocks have a hollow cavity.
[0018] In some optional embodiments, the suction barrel assembly is disposed at the lower portion of the steel cofferdam body, and the plane where the bottom of the barrel body is located is located below the plane where the bottom of the steel cofferdam body is located.
[0019] In some optional embodiments, the steel cofferdam body is a cylindrical structure, and four suction bucket assemblies are arranged at equal intervals.
[0020] In some optional embodiments, the bottom of the steel cofferdam body is in a trumpet shape, with the large diameter end facing downward.
[0021] Compared with the prior art, the advantages of the utility model are:
[0022] By setting up multiple suction bucket assemblies around the steel cofferdam body, the sinking posture of the steel cofferdam body can be adjusted by controlling the power of the suction bucket assemblies at different positions, eliminating the need for additional guide frames and improving the steel cofferdam body's ability to resist wave and current loads; at the same time, after the steel cofferdam body is planted, the suction bucket assembly can continue to provide the steel cofferdam body with a sinking pressure toward the riverbed, so that the steel cofferdam body can sink to the designed elevation, improving the mud suction efficiency of the steel cofferdam body when it sinks. At this time, the suction bucket assembly also provides support for the stable establishment of the steel cofferdam body on the riverbed, preventing the steel cofferdam body from overturning when the river flow rate is high and the riverbed is severely scoured. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 It is a structural schematic diagram of a steel box cofferdam structure of the utility model when it is positioned to the pile foundation;
[0025] Figure 2 for Figure 1 BB schematic diagram;
[0026] Figure 3 It is a schematic diagram of constructing a cap in a casting cavity of a steel box cofferdam structure of the utility model;
[0027] Figure 4 for Figure 3 AA schematic diagram;
[0028] Figure 5 It is a structural schematic diagram of a steel box cofferdam structure separated from a capping platform according to the utility model.
[0029] In the figure: 1. Steel cofferdam body; 11. Cofferdam corbel; 12. Wall panel blocks; 2. Suction barrel assembly; 21. Barrel body; 23. Connecting joint; 24. Connecting pin; 3. Pile foundation; 4. Gravel cushion layer; 5. Bottom sealing concrete; 6. Capping platform; 7. Pier body; 8. Jack. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0031] The following is a further detailed description of an embodiment of a steel casing cofferdam structure of the utility model in conjunction with the accompanying drawings.
[0032] like Figure 1 As shown, the present application provides a steel box cofferdam structure, including a steel cofferdam body 1 and a suction bucket assembly 2. The suction bucket assembly 2 provides power for the sinking and floating of the steel cofferdam body 1, so that the steel cofferdam body 1 can maintain a good posture and sink to the designed elevation along a set path. At the same time, after the construction of the pedestal and pier body is completed, it can assist the steel cofferdam body 1 to float.
[0033] Specifically, the steel cofferdam body 1 has a casting cavity for casting a cap; at least two suction bucket assemblies 2 are provided, which are arranged at intervals along the circumference of the steel cofferdam body 1, and the suction bucket assemblies 2 are used to provide power for the floating and sinking of the steel cofferdam body 1.
[0034] It can be understood that the multiple suction bucket assemblies 2 arranged around the steel cofferdam body 1 can adjust the sinking posture of the steel cofferdam body 1 by controlling the power of the suction bucket assemblies 2 at different positions, eliminating the need for additional guide frames and improving the wave and current load resistance of the steel cofferdam body 1. At the same time, after the steel cofferdam body 1 is planted, the suction bucket assembly 2 can continue to provide the steel cofferdam body 1 with a sinking pressure toward the riverbed, so that the steel cofferdam body 1 can sink to the designed elevation, thereby improving the mud suction efficiency of the steel cofferdam body 1 when sinking. At this time, the suction bucket assembly 2 also provides support for the stable establishment of the steel cofferdam body 1 on the riverbed, preventing the steel cofferdam body 1 from overturning when the river flow rate is high and the riverbed is severely scoured.
[0035] During construction, if Figure 1 and Figure 3 As shown, the riverbed at the pier position is first excavated in advance to the bottom of the cofferdam bottom concrete according to the construction organization requirements, and the pile foundation 3 is constructed in sequence according to the designed pile position. The steel box cofferdam structure is hoisted to the designed pier position by large-scale hoisting equipment and lowered. After the cofferdam sinks and settles stably, the suction bucket assembly 2 is started to provide negative pressure to assist the steel cofferdam body 1 to sink to the designed elevation; a crushed stone cushion layer 4 is thrown into the casting cavity of the steel cofferdam body 1, and underwater bottom concrete 5 is poured. After the bottom concrete reaches the designed strength, water is pumped out of the casting cavity to construct the cap concrete; after the construction of the cap 6 is completed, the pier body is cast in sections in sequence; after the pier body 7 is cast in place above the normal water level, a horizontal jack 8 is arranged on the side of the cap 6, and the jack 8 is used to loosen the bond between the steel cofferdam body 1 and the bottom concrete 5, and then the suction bucket assembly 2 is started to provide a lifting force to assist the steel cofferdam body 1 to float as a whole, so that the steel cofferdam body 1 is separated from the bottom concrete 5.
[0036] In some optional embodiments, the suction barrel assembly 2 includes a barrel body 21 and a pumping and draining device, and a water-permeable hole is opened on the bottom wall of the barrel body 21; the pumping and draining device is arranged in the barrel body 21 to pump out the water in the barrel body 21.
[0037] It can be understood that the pumping device pumps out the water in the barrel body 21 to form a water flow circulation from the outside of the barrel body 21 to the inside of the barrel body 21, or from the inside of the barrel body 21 to the outside of the barrel body 21. The pressure brought by the water flow to the barrel body 21 provides power for the buoyancy and sinking of the steel cofferdam body 1.
[0038] In some optional embodiments, the suction bucket assembly 2 is detachably connected to the steel cofferdam body 1 .
[0039] In order to facilitate the transportation and recycling of the steel box cofferdam structure, the suction bucket assembly 2 is detachably connected to the steel cofferdam body 1. In this way, during production and processing, the existing steel cofferdam structure can be used, and the suction bucket assembly 2 can be selected and installed in quantity according to the floating and sinking requirements of the steel cofferdam body 1, saving processing costs and improving processing efficiency. At the same time, they can be transported separately and installed at the construction site, reducing the inconvenience of transportation. On the other hand, different sizes of steel cofferdam bodies 1 and different numbers of suction bucket assemblies 2 can be combined to meet different construction requirements and improve the scope of application of the product.
[0040] In some optional embodiments, the suction bucket assembly 2 further includes a connecting joint 23 , and a cofferdam corbel 11 is provided on the outer wall of the steel cofferdam body 1 , and the cofferdam corbel 11 is detachably connected to the connecting joint 23 via a connecting pin 24 .
[0041] Of course, in other embodiments, other methods such as snap connection can be used to achieve the detachable connection between the steel cofferdam body 1 and the suction bucket assembly 2. In this example, the cofferdam bracket 11 is connected to the outer arm of the steel cofferdam body 1 by welding, and the connecting joint 23 is welded to the bucket body 21.
[0042] In some optional embodiments, the opening of the barrel body 21 faces downward, and the connecting joint 23 is disposed at the bottom of the barrel body 21 .
[0043] It can be understood that the opening of the barrel 21 is facing downward, so that the pumping and discharging device uses the water flow pressure to provide power when the steel cofferdam body 1 floats up and sinks. When the steel cofferdam body 1 sinks, even if the pumping and discharging device is not started, the water flow can directly enter through the opening of the barrel 21 and flow out from the water permeable hole, reducing the resistance to the sinking of the steel cofferdam body 1.
[0044] In some optional embodiments, the steel cofferdam body 1 is a cylindrical structure, and four suction bucket assemblies 2 are arranged at equal intervals.
[0045] In order to allow the steel cofferdam body 1 to sink to the designed tonnage and stably land, the steel cofferdam body 1 is designed as a cylindrical structure, and the suction bucket assemblies 2 are arranged at equal intervals around the cylindrical side, so that the overall balance of the steel box cofferdam structure is optimal, which is conducive to sinking and positioning. In other embodiments, if the diameter of the steel cofferdam body 1 is large, or a larger load-bearing capacity is required, the number of suction bucket assemblies 2 can be appropriately increased, but it should be ensured that all the above-mentioned suction bucket assemblies 2 are arranged at equal intervals around the steel cofferdam body 1.
[0046] In some optional embodiments, the steel cofferdam body 1 includes a plurality of wall panel blocks 12, and all of the wall panel blocks 12 are detachably connected in sequence.
[0047] That is to say, the steel cofferdam body 1 is assembled from a plurality of wall panel blocks 12. In this example, the wall panel blocks 12 are long strips with curvature, and two adjacent wall panel blocks 12 are connected by snap-fitting grooves and protrusions. It should be noted that the connection joint 23 is connected to the wall panel blocks 12 to prevent interference with the assembly of the wall panel blocks 12.
[0048] Furthermore, the wall panel blocks 12 have a hollow cavity. In other words, the steel cofferdam body 1 is a double-walled steel casing.
[0049] When the steel cofferdam main body 1 is sunk, the self-weight of the steel cofferdam main body 1 and the pressure generated by injecting water into the above-mentioned cavity can be used to increase the sinking speed of the steel cofferdam main body 1; when the steel cofferdam main body 1 floats, water can be injected into the casting cavity while the water in the above-mentioned cavity is pumped out, thereby generating buoyancy to assist the steel cofferdam main body 1 in floating up.
[0050] In some optional embodiments, the suction barrel assembly 2 is disposed at the lower portion of the steel cofferdam body 1 , and the plane where the bottom of the barrel body 21 is located is located below the plane where the bottom of the steel cofferdam body 1 is located.
[0051] That is to say, when the entire steel box cofferdam structure sinks, the barrel body 21 will be planted first. After all the barrel bodies 21 are planted and stable, the pumping parts are started to provide negative pressure for sinking. The barrel body 21 continues to move downward and assists the steel cofferdam to sink to the set elevation as a whole. The barrel body penetrates into the soil layer to a certain depth to ensure that the horizontal displacement of the bottom of the cofferdam is small, and the vertical bearing capacity provided between the barrel body and the stratum can ensure that the steel cofferdam body 1 does not continue to sink under the scouring of the riverbed, which is helpful for the construction of the bottom sealing concrete and improves the anti-overturning ability of the steel cofferdam body 1.
[0052] In some optional embodiments, the bottom of the steel cofferdam body 1 is in a trumpet shape, with the large diameter end facing downward.
[0053] That is to say, the wall thickness at the bottom of the steel cofferdam body 1 is smaller than the wall thickness at the top of the steel cofferdam body 1. The reason for this arrangement is to provide more space for the bottom sealing concrete 5, and it is also convenient to position the steel cofferdam body 1 to the side around the pile foundation 3.
[0054] The working principle of the embodiment of the present application is as follows: first, the riverbed at the pier position is excavated in advance to the concrete bottom of the cofferdam bottom seal according to the construction organization requirements, and the pile foundation 3 is constructed in sequence according to the designed pile position. The steel casing cofferdam structure is hoisted to the designed pier position by large-scale hoisting equipment and lowered, and water is injected into the interlayer of the double-walled steel casing. The weight of the steel cofferdam body 1 and the pressure generated by the water injection into the above cavity are used to increase the sinking speed of the steel cofferdam body 1. At the same time, the power of the suction bucket assembly 2 at different positions is controlled to adjust the sinking posture of the steel cofferdam body 1 to ensure the lowering accuracy of the steel cofferdam body 1.
[0055] After all the barrel bodies 21 are stably planted, the pumping and drainage parts are started to provide negative pressure for penetration, and the barrel bodies 21 continue to move downward and assist the steel cofferdam to sink to the set elevation as a whole, and the barrel body penetrates into the soil layer to a certain depth; a crushed stone cushion layer 4 is thrown into the casting cavity of the steel cofferdam body 1, and underwater bottom concrete 5 is poured. After the bottom concrete reaches the designed strength, water is pumped out of the casting cavity to construct the cap concrete; after the construction of the cap 6 is completed, the pier body is cast in sections in sequence; after the pier body 7 is cast above the normal water level, a horizontal jack 8 is arranged on the side of the cap 6, and the jack 8 is used to loosen the bond between the steel cofferdam body 1 and the bottom concrete 5, and the interlayer of the double-walled steel casing is pumped out, and then the suction bucket assembly 2 is started to provide a lifting force to assist the steel cofferdam body 1 to float as a whole, so that the steel cofferdam body 1 is separated from the bottom concrete 5.
[0056] If based on a larger-sized pedestal foundation, the steel cofferdam body 1 is assembled from multiple wall panel blocks 12, and the dismantling is done by pulling out the wall panel blocks 12 piece by piece using lifting equipment; if based on a smaller-sized pedestal foundation, the steel cofferdam body 1 can be an integral structure, and during dismantling, the steel cofferdam body 1 and the suction bucket assembly 2 can be pulled out as a whole using lifting equipment.
[0057] The steel box cofferdam structure of the present application can adjust the sinking posture of the steel cofferdam body 1 by controlling the power of the suction barrel assemblies 2 at different positions through multiple suction barrel assemblies 2 arranged on the side of the steel cofferdam body 1, thereby eliminating the need for additional guide frames and improving the wave and current load resistance of the steel cofferdam body 1; at the same time, after the steel cofferdam body 1 is planted, the suction barrel assemblies 2 can continue to provide the steel cofferdam body 1 with a sinking pressure toward the riverbed, so that the steel cofferdam body 1 can sink to the designed elevation, thereby improving the mud suction efficiency of the steel cofferdam body 1 when sinking. At this time, the suction barrel assemblies 2 also provide support for the stable establishment of the steel cofferdam body 1 on the riverbed, thereby preventing the steel cofferdam body 1 from overturning when the river flow rate is high and the riverbed is severely scoured.
[0058] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0059] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0060] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. A steel box cofferdam structure, characterized in that: include: A steel cofferdam body (1) having a casting cavity for casting a cap; A plurality of suction bucket assemblies (2) are arranged at intervals along the circumference of the steel cofferdam body (1), and the suction bucket assemblies (2) are used to provide power for the buoyancy and sinking of the steel cofferdam body (1).
2. The steel box cofferdam structure according to claim 1, characterized in that: The suction bucket assembly (2) comprises: The barrel (21) has a water-permeable hole on its bottom wall; A pumping and draining member is arranged in the barrel body (21) and is used for pumping and draining water in the barrel body (21).
3. The steel box cofferdam structure according to claim 2, characterized in that: The suction bucket assembly (2) is detachably connected to the steel cofferdam body (1).
4. The steel box cofferdam structure according to claim 3, characterized in that: The suction bucket assembly (2) further comprises a connecting joint (23); a cofferdam corbel (11) is provided on the outer wall of the steel cofferdam body (1); and the cofferdam corbel (11) is detachably connected to the connecting joint (23) via a connecting pin (24).
5. The steel box cofferdam structure according to claim 4, characterized in that: The opening of the barrel body (21) faces downward, and the connecting joint (23) is arranged at the bottom of the barrel body (21).
6. The steel box cofferdam structure according to claim 1, characterized in that: The steel cofferdam body (1) comprises a plurality of wall panel blocks (12), and all the wall panel blocks (12) are detachably connected in sequence.
7. The steel box cofferdam structure according to claim 6, characterized in that: The wall panel block (12) has a hollow cavity.
8. The steel box cofferdam structure according to claim 2, characterized in that: The suction bucket assembly (2) is arranged at the lower part of the steel cofferdam body (1), and the plane where the bottom of the bucket body (21) is located is located below the plane where the bottom of the steel cofferdam body (1) is located.
9. The steel box cofferdam structure according to claim 1, characterized in that: The steel cofferdam body (1) is a cylindrical structure, and four suction bucket assemblies (2) are arranged at equal intervals.
10. The steel box cofferdam structure according to claim 1, characterized in that: The bottom of the steel cofferdam body (1) is in a trumpet-mouth shape, with the large-diameter end facing downwards.