Double-wall steel cofferdam vertical connecting structure and construction method thereof

Abstract

The invention belongs to the technical field of cofferdam construction, and discloses a double-wall steel cofferdam vertical connecting structure and a construction method thereof.The connecting structure comprises a fixing assembly and a connecting assembly, the fixing assembly comprises a first supporting beam and a second supporting beam, and the first supporting beam and the second supporting beam both extend in the horizontal direction; the two steel cofferdam sections are arranged at the upper ends of the two double-wall steel cofferdam sections in a one-to-one correspondence mode. The connecting assembly comprises a first connecting rod, a second connecting rod and a connecting sleeve, the first connecting rod and the second connecting rod extend in the vertical direction, the first connecting rod is arranged on the first supporting beam in a penetrating mode, the second connecting rod is arranged on the second supporting beam in a penetrating mode, and the connecting sleeve is arranged at the upper end of the first connecting rod; and the lower end of the second connecting rod can stretch into and be screwed into the connecting sleeve in a threaded mode and abut against the end of the first connecting rod, so that two adjacent double-wall steel cofferdam sections are quickly connected, the subsequent double-wall steel cofferdam is very convenient to disassemble, and the working efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of cofferdam construction, and in particular to a double-wall steel cofferdam vertical connection structure and a construction method thereof. Background Art

[0002] Cofferdam is a temporary retaining structure built in the construction of permanent water conservancy facilities in water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building so as to drain water, excavate foundation pits and build buildings in the cofferdam. In recent years, double-walled steel cofferdams have been widely used as temporary water retaining structures.

[0003] In the prior art, the vertical sections of the double-walled steel cofferdam are connected by welding, which results in the need for divers to perform underwater cutting operations when the double-walled steel cofferdam is subsequently dismantled, wasting manpower and material resources and having low operating efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a double-wall steel cofferdam vertical connection structure and a construction method thereof, which can realize the rapid assembly of the double-wall steel cofferdam, and the subsequent dismantling is also very convenient, which can effectively improve the working efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] On the one hand, a double-walled steel cofferdam vertical connection structure is provided, which is used to connect two adjacent double-walled steel cofferdam segments, wherein the double-walled steel cofferdam segments extend in a vertical direction;

[0007] The double-wall steel cofferdam vertical connection structure comprises:

[0008] A fixing assembly, comprising a first supporting beam and a second supporting beam, wherein the first supporting beam and the second supporting beam both extend in a horizontal direction and are respectively arranged at the upper ends of the two double-walled steel cofferdam segments in a one-to-one correspondence;

[0009] The connecting assembly includes a first connecting rod, a second connecting rod and a connecting sleeve. The first connecting rod and the second connecting rod both extend in a vertical direction. The first connecting rod is passed through the first support beam, and the second connecting rod is passed through the second support beam. The connecting sleeve is arranged at the upper end of the first connecting rod. The lower end of the second connecting rod can be extended into and screwed into the connecting sleeve, and abut against the end of the first connecting rod.

[0010] As an optional solution for the vertical connection structure of a double-walled steel cofferdam, the vertical connection structure of the double-walled steel cofferdam also includes a limit assembly, and the limit assemblies are respectively arranged on the wall surfaces on both sides of the double-walled steel cofferdam segment along the horizontal direction, and the limit assembly can abut against the outer side of the connection between two adjacent double-walled steel cofferdam segments.

[0011] As an optional solution for the vertical connection structure of a double-walled steel cofferdam, the limit assembly includes a limit plate and a reinforcement plate. The limit plate is protruding from the upper end of the outer wall of the double-walled steel cofferdam segment to abut the outer side of the connection between the two double-walled steel cofferdam segments; the reinforcement plate is fixed on the limit plate.

[0012] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, the connection assembly also includes a first connection nut, which is welded to the bottom side of the first support beam and threadedly connected to the outer peripheral wall of the first connecting rod.

[0013] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, the connection assembly also includes a first anti-loosening nut, which is screwed on the first connecting rod and abuts against a side of the first connecting nut facing away from the first support beam.

[0014] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, the connection assembly also includes a second connection nut, which is screwed onto the second connection rod and abuts against the upper end surface of the second support beam.

[0015] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, the connection assembly also includes an anti-loosening gasket, which is sleeved on the second connecting rod and arranged between the second connecting nut and the second support beam.

[0016] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, the connection assembly also includes a second anti-loosening nut, which is threaded on the second connecting rod and abuts against the side of the second connecting nut facing away from the second support beam.

[0017] As an optional solution for the vertical connection structure of the double-walled steel cofferdam, a plurality of the connection components are arranged in the horizontal direction.

[0018] On the other hand, a construction method of a double-walled steel cofferdam vertical connection structure is provided, which is applied to the above-mentioned double-walled steel cofferdam vertical connection structure and comprises the following steps:

[0019] S1: hoisting the first double-walled steel cofferdam segment to an installation position, installing the first connecting rod on the first supporting beam of the double-walled steel cofferdam segment, and installing the connecting sleeve on the first connecting rod;

[0020] S2: Use external lifting equipment to lift the double-walled steel cofferdam segment of the second section to a position 0.5 m above the double-walled steel cofferdam segment of the first section and suspend it, and then align the lower end of the second connecting rod with the connecting sleeve;

[0021] S3: After alignment, the double-walled steel cofferdam section of the second section is positioned above the double-walled steel cofferdam section of the first section to complete the connection of two adjacent double-walled steel cofferdam sections.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a double-walled steel cofferdam vertical connection structure and a construction method thereof. The connection structure is used to connect two adjacent double-walled steel cofferdam segments extending in a vertical direction, and includes a fixing assembly and a connection assembly. The fixing assembly includes a first support beam and a second support beam. The first support beam and the second support beam both extend in a horizontal direction and are respectively and one-to-one arranged at the upper ends of the two double-walled steel cofferdam segments. The connection assembly includes a first connecting rod, a second connecting rod and a connecting sleeve. The first connecting rod and the second connecting rod both extend in a vertical direction. The first connecting rod is inserted on the first support beam, and the second connecting rod is inserted on the second support beam. The connecting sleeve is arranged at the upper end of the first connecting rod. The lower end of the second connecting rod can extend into the connecting sleeve and abut against the end of the first connecting rod to achieve rapid connection of two adjacent double-walled steel cofferdam segments. In addition, the subsequent removal of the double-walled steel cofferdam is also very convenient, which can effectively improve the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a double-wall steel cofferdam vertical connection structure provided in an embodiment of a specific implementation manner of the present invention;

[0025] Figure 2 yes Figure 1 Sectional view in the AA direction;

[0026] Figure 3 It is a schematic diagram of the first construction process of the double-wall steel cofferdam vertical connection structure provided in the specific implementation example of the present invention;

[0027] Figure 4 It is a schematic diagram of the second construction process of the double-wall steel cofferdam vertical connection structure provided in the specific implementation example of the present invention;

[0028] Figure 5 It is a schematic diagram of the third construction process of the double-wall steel cofferdam vertical connection structure provided in the specific implementation example of the present invention.

[0029] In the figure:

[0030] 100. Double-walled steel cofferdam segment; 101. Inner chord member; 102. Horizontal web member;

[0031] 1. Fixing assembly; 11. First supporting beam; 12. Second supporting beam;

[0032] 2. Connecting assembly; 21. First connecting rod; 22. Second connecting rod; 23. Connecting sleeve; 24. First connecting nut; 25. First anti-loosening nut; 26. Second connecting nut; 27. Anti-loosening washer; 28. Second anti-loosening nut;

[0033] 3. Limiting assembly; 31. Limiting plate; 32. Reinforcing plate. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] This embodiment provides a double-walled steel cofferdam vertical connection structure, which is used to connect two adjacent double-walled steel cofferdam segments 100 extending in the vertical direction. Figure 1 to Figure 2As shown, the connection structure includes a fixing assembly 1 and a connecting assembly 2. The fixing assembly 1 includes a first support beam 11 and a second support beam 12. The first support beam 11 and the second support beam 12 both extend in the horizontal direction and are respectively arranged at the upper ends of two double-walled steel cofferdam segments 100 in a one-to-one correspondence. The connecting assembly 2 includes a first connecting rod 21, a second connecting rod 22 and a connecting sleeve 23. The first connecting rod 21 and the second connecting rod 22 both extend in the vertical direction. The first connecting rod 21 is penetrated on the first support beam 11, and the second connecting rod 22 is penetrated on the second support beam 12. The connecting sleeve 23 is arranged at the upper end of the first connecting rod 21. The lower end of the second connecting rod 22 can be inserted into and screwed into the connecting sleeve 23, and abuts against the end of the first connecting rod 21, so as to realize the rapid connection of two adjacent double-walled steel cofferdam segments 100. In addition, the subsequent removal of the double-walled steel cofferdam is also very convenient, which can effectively improve the working efficiency.

[0039] Specifically, an inner chord member 101 is provided on the double-walled steel cofferdam segment 100 , and the first support beam 11 and the second support beam 12 are both welded to the corresponding inner chord member 101 .

[0040] For example, in this embodiment, the first connecting rod 21 and the second connecting rod 22 are both fine-rolled threaded steel bars commonly used in the art, which have high strength and good load capacity.

[0041] Optionally, a plurality of connection assemblies 2 are provided in the horizontal direction to improve the stability and reliability of the connection between the two double-walled steel cofferdam segments 100. Specifically, in this embodiment, two connection assemblies 2 are provided; in other embodiments, the number of connection assemblies 2 can be set as required, and is not specifically limited here.

[0042] Alternatively, if Figure 1 As shown, the double-walled steel cofferdam vertical connection structure also includes a limiting component 3. The limiting components 3 are respectively arranged on the wall surfaces on both sides of the double-walled steel cofferdam segment 100 in the horizontal direction. The limiting component 3 can abut the outer side of the connection between two adjacent double-walled steel cofferdam segments 100 to limit the accuracy of the connection between the two double-walled steel cofferdam segments 100 in the horizontal direction, thereby further improving the stability of the connection.

[0043] Further, continue to refer to Figure 1 The limiting assembly 3 includes a limiting plate 31 and a reinforcing plate 32. The limiting plate 31 is protruded from the upper end of the outer wall of the double-walled steel cofferdam segment 100 to abut against the outer side of the connection between the two double-walled steel cofferdam segments 100; the reinforcing plate 32 is fixed on the limiting plate 31 to improve the overall strength of the limiting assembly 3.

[0044] Specifically, in this embodiment, the reinforcing plate 32 is trapezoidal in shape, which ensures overall strength while saving manufacturing materials.

[0045] Optionally, refer to Figure 1 and Figure 2 The connecting assembly 2 also includes a first connecting nut 24, which is welded to the bottom side of the first support beam 11 and is threadedly connected to the outer wall of the first connecting rod 21 to improve the stability of the first connecting rod 21 set on the first support beam 11; at the same time, the materials are simple and easy to obtain, and have good economy.

[0046] Furthermore, the connection assembly 2 further includes a first anti-loosening nut 25, which is screwed onto the first connection rod 21 and abuts against a side of the first connection nut 24 away from the first support beam 11. The first anti-loosening nut 25 and the first connection nut 24 form a double nut arrangement, which can improve the stability and earthquake resistance of the connection between the first connection rod 21 and the first support beam 11.

[0047] Optionally, continue to refer to Figure 1 and Figure 2 The connecting assembly 2 also includes a second connecting nut 26, which is screwed on the second connecting rod 22 and abuts against the upper end surface of the second support beam 12 to improve the stability of the second connecting rod 22 set on the second support beam 12; at the same time, the materials are simple and easy to obtain, and have good economy.

[0048] Furthermore, the connection assembly 2 further includes a second anti-loosening nut 28, which is threadedly screwed on the second connection rod 22 and abuts against the side of the second connection nut 26 away from the second support beam 12. The second anti-loosening nut 28 and the second connection nut 26 form a double nut arrangement, which can improve the stability and earthquake resistance of the connection between the second connection rod 22 and the second support beam 12.

[0049] In addition, this embodiment also provides a construction method of a double-walled steel cofferdam vertical connection structure, which is applied to the above-mentioned double-walled steel cofferdam vertical connection structure and includes the following steps:

[0050] S1: hoisting the first double-walled steel cofferdam segment 100 to the installation position, installing the first connecting rod 21 on the first supporting beam 11 of the double-walled steel cofferdam segment 100, and installing the connecting sleeve 23 on the first connecting rod 21;

[0051] The above steps, specifically in this embodiment, use external lifting equipment to lift the first double-walled steel cofferdam segment 100 to the installation position, and pass the first connecting rod 21 through the first support beam 11, and screw it on the first connecting nut 24 and the first locking nut 25. Then install the connecting sleeve 23 on the upper end of the first connecting rod 21, and at the same time, install the limit assembly 3 on the two outer side walls of the double-walled steel cofferdam segment 100 in the horizontal direction.

[0052] Specifically, at least a portion of the inner wall of the connecting sleeve 23 is provided with an internal thread, and an outer peripheral wall of the first connecting rod 21 is provided with an external thread, so that the connecting sleeve 23 can be screwed onto the first connecting rod 21 .

[0053] In addition, in double-wall steel cofferdams, such as Figure 3 As shown, the bottommost double-walled steel cofferdam segment 100 has a blade foot.

[0054] S2: Use external lifting equipment to lift the second double-walled steel cofferdam segment 100 to a position 0.5 m above the first double-walled steel cofferdam segment 100 and suspend it there, then align the lower end of the second connecting rod 22 with the connecting sleeve 23 .

[0055] In the above steps, specifically in this embodiment, the second double-walled steel cofferdam segment 100 is hoisted to 0.5m above the first double-walled steel cofferdam segment 100 using external hoisting equipment, and the on-site operator aligns the lower end of the second connecting rod 22 with the connecting sleeve 23, that is, Figure 4 shown.

[0056] Specifically, the double-walled steel cofferdam segment 100 is further provided with a horizontal web member 102, and the second connecting rod 22 passes through the second support beam 12 and the horizontal web member 102 in sequence and then extends into the connecting sleeve 23. The provision of the horizontal web member 102 can improve the overall connection strength of the double-walled steel cofferdam.

[0057] S3: After alignment, the second double-walled steel cofferdam segment 100 is placed on top of the first double-walled steel cofferdam segment 100 to complete the connection of two adjacent double-walled steel cofferdam segments 100.

[0058] The above steps, specifically in this embodiment, after the second double-walled steel cofferdam segment 100 is placed, the second connecting rod 22 is tensioned. After the tensioning is completed, the second connecting nut 26 and the second anti-loosening nut 28 are installed in sequence to improve the connection strength of the two adjacent double-walled steel cofferdam segments 100.

[0059] Alternatively, if Figure 5 As shown, the connection assembly 2 also includes an anti-loosening gasket 27, which is sleeved on the second connecting rod 22 and arranged between the second connecting nut 26 and the second support beam 12 to further improve the connection stability between the second connecting rod 22 and the second support beam 12.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A double-walled steel cofferdam vertical connection structure, used for connecting two adjacent double-walled steel cofferdam segments (100), wherein the double-walled steel cofferdam segments (100) extend in a vertical direction; It is characterized in that The double-wall steel cofferdam vertical connection structure comprises: A fixing assembly (1) comprising a first supporting beam (11) and a second supporting beam (12), wherein the first supporting beam (11) and the second supporting beam (12) both extend in a horizontal direction and are respectively arranged at the upper ends of the two double-walled steel cofferdam segments (100) in a one-to-one correspondence; The connecting assembly (2) comprises a first connecting rod (21), a second connecting rod (22) and a connecting sleeve (23), wherein the first connecting rod (21) and the second connecting rod (22) both extend in a vertical direction, the first connecting rod (21) is passed through the first supporting beam (11), and the second connecting rod (22) is passed through the second supporting beam (12), the connecting sleeve (23) is arranged at the upper end of the first connecting rod (21), and the lower end of the second connecting rod (22) can extend into and be screwed into the connecting sleeve (23) and abut against the end of the first connecting rod (21).

2. The double-wall steel cofferdam vertical connection structure according to claim 1 is characterized in that: The double-walled steel cofferdam vertical connection structure also includes a limiting assembly (3), and the limiting assembly (3) is respectively arranged on the wall surface on both sides of the double-walled steel cofferdam segment (100) in the horizontal direction, and the limiting assembly (3) can abut against the outer side of the connection between two adjacent double-walled steel cofferdam segments (100).

3. The double-wall steel cofferdam vertical connection structure according to claim 2 is characterized in that: The limiting assembly (3) comprises a limiting plate (31) and a reinforcing plate (32); the limiting plate (31) is protrudingly arranged on the upper end of the outer wall of the double-walled steel cofferdam segment (100) to abut against the outer side of the connection between the two double-walled steel cofferdam segments (100); and the reinforcing plate (32) is fixedly arranged on the limiting plate (31).

4. The double-wall steel cofferdam vertical connection structure according to claim 1 is characterized in that: The connection assembly (2) further comprises a first connection nut (24), wherein the first connection nut (24) is welded to the bottom side of the first support beam (11) and is threadedly connected to the outer peripheral wall of the first connection rod (21).

5. The double-wall steel cofferdam vertical connection structure according to claim 4 is characterized in that: The connection assembly (2) further comprises a first anti-loosening nut (25), wherein the first anti-loosening nut (25) is screwed onto the first connection rod (21) and abuts against a side of the first connection nut (24) facing away from the first support beam (11).

6. The double-wall steel cofferdam vertical connection structure according to claim 1 is characterized in that: The connecting assembly (2) further comprises a second connecting nut (26), wherein the second connecting nut (26) is screwed onto the second connecting rod (22) and abuts against the upper end surface of the second supporting beam (12).

7. The double-wall steel cofferdam vertical connection structure according to claim 6 is characterized in that: The connection assembly (2) further comprises an anti-loosening washer (27), wherein the anti-loosening washer (27) is sleeved on the second connection rod (22) and is arranged between the second connection nut (26) and the second support beam (12).

8. The double-wall steel cofferdam vertical connection structure according to claim 6 is characterized in that: The connecting assembly (2) further comprises a second anti-loosening nut (28), wherein the second anti-loosening nut (28) is threadedly screwed onto the second connecting rod (22) and abuts against a side of the second connecting nut (26) facing away from the second supporting beam (12).

9. The double-walled steel cofferdam vertical connection structure according to any one of claims 1 to 8, characterized in that: The connection components (2) are arranged in plurality along the horizontal direction.

10. A construction method for a double-walled steel cofferdam vertical connection structure, characterized in that: The double-wall steel cofferdam vertical connection structure applied to any one of claims 1 to 9 above comprises the following steps: S1: hoisting the first double-walled steel cofferdam segment (100) to an installation position, installing the first connecting rod (21) on the first supporting beam (11) of the double-walled steel cofferdam segment (100), and installing the connecting sleeve (23) on the first connecting rod (21); S2: Use external lifting equipment to lift the second double-walled steel cofferdam segment (100) to a position 0.5 m above the first double-walled steel cofferdam segment (100) and suspend it, then align the lower end of the second connecting rod (22) with the connecting sleeve (23); S3: After alignment, the second double-walled steel cofferdam segment (100) is placed on top of the first double-walled steel cofferdam segment (100), completing the connection of two adjacent double-walled steel cofferdam segments (100).

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