Construction method of concentric double pipe structure

Abstract

This invention belongs to the field of steel structure construction technology and discloses a construction method for a concentric double-tube structure. The method involves dividing the concentric double-tube structure into multiple inner tubes and multiple outer tubes, and pre-installing a fixed working frame on each outer tube. One inner tube is then coaxially installed inside an outer tube in the vertical direction, ensuring that the inner and outer tubes are coaxial and not eccentric, thus guaranteeing the assembly quality of the concentric double-tube structure. The movable working frame is detachably installed on the inner and outer tubes, allowing for multiple disassemblies and reassemblies, saving construction costs. Using the movable working frame, workers can install the next inner tube onto the top of the previous inner tube. Similarly, the next outer tube is installed onto the top of the previous outer tube using the fixed working frame. As each inner and outer tube is installed alternately, the installation position of the movable working frame is continuously raised until all inner and outer tubes are assembled, improving construction efficiency and ensuring assembly quality.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and in particular to a construction method for a concentric double-tube structure. Background Technology

[0002] As building structures become increasingly diverse in form, the requirements for structural design are also increasing. As a result, many concentric double-tube structures with complex cross-sectional shapes and large dimensions have emerged to meet the requirements of vertical load-bearing capacity.

[0003] The large size and weight of concentric twin-tube structures present significant challenges to construction. Traditional assembly methods typically involve segmenting the structure at a cross-section and using large lifting equipment capable of supporting the weight of each segment. Welding is then performed at the segmentation points to complete the assembly. However, even with this method, the segmented structure remains heavy, requiring large lifting equipment and increasing costs. Furthermore, the numerous weld seams and limited working space for workers hinder construction, making it difficult to guarantee construction quality and efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for a concentric double-tube structure, which can ensure the construction efficiency and quality of the concentric double-tube structure, save costs, and facilitate construction.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A construction method for a concentric double-tube structure, comprising:

[0007] Step 1: Divide the concentric double-tube structure into multiple inner tubes and multiple outer tubes, and pre-install a fixed work frame on each outer tube.

[0008] Step 2: On the work surface, coaxially install one section of inner tube inside one section of outer tube in the vertical direction;

[0009] Step 3: After the inner and outer pipes are installed, the movable work frame is detachably installed on the inner and outer pipes. Using the movable work frame, the next section of the inner pipe is installed on top of the previous section of the inner pipe.

[0010] Step 4: Disassemble the movable work frame and install the next section of the outer pipe onto the top of the previous section of the outer pipe using the fixed work frame;

[0011] Repeat steps three and four, and as each inner and outer tube is installed alternately, the installation position of the movable work frame is continuously raised until the assembly of all inner and outer tubes is completed.

[0012] Optionally, in step one, a mechanical analysis is performed on the cross-section of the concentric double-tube structure to determine the segment length of each inner and outer tube.

[0013] Optionally, in step one, the fixed work frame includes a fixed plate and a reinforcing rib. The fixed plate is fixedly connected to the outer peripheral wall of the outer tube, and the two ends of the reinforcing rib are respectively connected to the outer tube and the fixed plate.

[0014] Optionally, in step two, the inner tube is higher than the outer tube and extends out of the outer tube.

[0015] Optionally, in step two, multiple connectors are arranged at intervals along the circumference of the inner tube, with the two ends of the connectors connected to the outer circumferential wall of the inner tube and the inner circumferential wall of the outer tube, respectively.

[0016] Optionally, in step three, the inner tube is provided with an ear plate, one end of the movable working frame is screwed to the ear plate, and the other end is placed on the top of the outer tube.

[0017] Optionally, in step three, the movable work frame includes a horizontal plate and a vertical plate. The horizontal plate is connected to the vertical plate and is erected on the top of the outer tube. The vertical plate is screwed onto the inner tube and extends along the axial direction of the inner tube.

[0018] Optionally, the mobile work frame also includes diagonal braces, with both ends of the diagonal braces connected to the horizontal plate and the vertical plate, respectively.

[0019] Optionally, multiple inner tubes and multiple outer tubes correspond one-to-one, with adjacent inner tubes connected by welding and adjacent outer tubes connected by welding.

[0020] Optionally, after all the inner and outer pipes are assembled, concrete can be poured between the inner and outer pipes.

[0021] Beneficial effects:

[0022] This invention provides a construction method for a concentric double-tube structure. The concentric double-tube structure is divided into multiple inner tubes and multiple outer tubes for easy hoisting and handling. A fixed working frame is pre-installed on each outer tube section, providing workers with sufficient space to assemble the outer tubes. Then, on the working surface, one inner tube section is coaxially installed inside one outer tube section vertically, ensuring coaxial alignment and preventing eccentricity, thus guaranteeing the assembly quality of the concentric double-tube structure. After the inner and outer tubes are installed, a movable working frame is detachably installed on both, allowing for multiple disassemblies and reassemblies, saving construction costs. Using the movable working frame, workers can install the next inner tube section onto the top of the previous inner tube section, thus completing the assembly of the two inner tubes. After the assembly of two adjacent inner tubes is completed, the movable work frame is disassembled to avoid interfering with the installation of the next outer tube section. The next outer tube section is then installed on top of the previous outer tube section using the fixed work frame. As each inner and outer tube section is installed alternately, the installation position of the movable work frame is continuously raised until the assembly of all inner and outer tubes is completed. This improves construction efficiency and ensures assembly quality. Through the above setup, the construction method for the concentric double-tube structure of this application can guarantee the construction efficiency and quality of the concentric double-tube structure, save costs, and facilitate construction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first inner tube installed inside the first outer tube according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section at point AA;

[0025] Figure 3 This is an installation diagram of the movable work frame provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation of adjacent inner tubes provided in an embodiment of the present invention;

[0027] Figure 5 yes Figure 4 Schematic diagram of the cross section at point BB;

[0028] Figure 6 This is a schematic diagram of the installation of adjacent outer tubes provided in an embodiment of the present invention;

[0029] Figure 7 yes Figure 3 A magnified view of a portion of point A in the middle.

[0030] In the picture:

[0031] 1. Inner tube;

[0032] 2. Outer tube;

[0033] 3. Fixed work frame; 31. Fixed plate; 32. Reinforcing rib;

[0034] 4. Movable work frame; 41. Horizontal plate; 42. Vertical plate; 43. Diagonal brace;

[0035] 5. Connectors;

[0036] 6. Earplate. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] like Figures 1-7 As shown, this embodiment provides a construction method for a concentric double-tube structure, which includes:

[0042] Step 1: Divide the concentric double-tube structure into multiple inner tubes 1 and multiple outer tubes 2, and pre-install a fixed work frame 3 on each outer tube 2.

[0043] Step 2: On the working surface, coaxially install one inner tube 1 into one outer tube 2 in the vertical direction.

[0044] Step 3: After the inner tube 1 and outer tube 2 are installed, the movable work frame 4 is detachably installed on the inner tube 1 and outer tube 2. Through the movable work frame 4, the next section of inner tube 1 is installed on the top of the previous section of inner tube 1.

[0045] Step 4: Disassemble the movable work frame 4, and install the next section of outer pipe 2 onto the top of the previous section of outer pipe 2 using the fixed work frame 3;

[0046] Repeat steps three to four. As each inner tube 1 and outer tube 2 is installed alternately, the installation position of the movable work frame 4 is continuously raised until the assembly of all inner tubes 1 and outer tubes 2 is completed.

[0047] In this embodiment, the concentric double-tube structure is divided into multiple inner tubes 1 and multiple outer tubes 2 to facilitate hoisting and handling. A fixed working frame 3 is pre-installed on each outer tube 2 section. By setting up the fixed working frame 3, the operators have corresponding working space on the fixed working frame 3 to assemble the outer tube 2. Then, on the working surface, one inner tube 1 section is coaxially installed inside one outer tube 2 section in the vertical direction to ensure that the inner tube 1 and outer tube 2 are coaxially set without eccentricity, thus ensuring the assembly quality of the concentric double-tube structure. After the inner tube 1 and outer tube 2 are installed, the movable working frame 4 is detachably installed on the inner tube 1 and outer tube 2, allowing the movable working frame 4 to be disassembled and installed multiple times, saving construction costs. Through the movable working frame 4, the operators can install the next inner tube 1 section on the top of the previous inner tube 1, thereby completing the assembly of the two inner tubes 1. After the two adjacent inner tubes 1 are assembled, the movable work frame 4 is disassembled to avoid interfering with the installation of the next outer tube 2. The next outer tube 2 is then installed on top of the previous outer tube 2 using the fixed work frame 3. As each inner tube 1 and outer tube 2 is installed alternately, the installation position of the movable work frame 4 is continuously raised until all inner tubes 1 and outer tubes 2 are assembled. This improves construction efficiency and ensures assembly quality. Through the above setup, the construction method of the concentric double-tube structure in this embodiment can guarantee the construction efficiency and quality of the concentric double-tube structure, save costs, and facilitate construction.

[0048] Specifically, in step one above, a mechanical analysis is performed on the cross-section of the concentric double-tube structure, such as axial force and shear force analysis, to determine the segmentation length of each inner tube 1 and outer tube 2. By designing a reasonable segmentation length, the cross-sectional shape of the concentric double-tube structure can be optimized, thereby improving its structural stability.

[0049] Specifically, such as Figures 1-4 As shown, in step one above, the fixed work frame 3 includes a fixed plate 31 and a reinforcing rib 32. The fixed plate 31 is fixedly connected to the outer peripheral wall of the outer tube 2 so that the operator can connect and assemble the outer tube 2 on the fixed plate 31. The two ends of the reinforcing rib 32 are respectively connected to the outer tube 2 and the fixed plate 31, thereby improving the connection strength of each component and ensuring the safety of the operation.

[0050] More specifically, in this embodiment, the fixing plate 31 extends horizontally and is welded to the outer tube 2, thereby ensuring the safety of workers operating on the fixing plate 31. In other embodiments, the fixing plate 31 can also be screwed onto the outer tube 2 for easy assembly and disassembly, while still achieving the above-mentioned functions. The specific connection method of the fixing plate 31 is not further limited here.

[0051] Specifically, such as Figures 1-3 As shown, in step two above, the inner tube 1 is higher than the outer tube 2 and extends out of the outer tube 2, thereby providing space for the installation of the movable work frame 4. This facilitates the operator to operate on the part of the inner tube 1 that is higher than the outer tube 2 on the movable work frame 4, and makes it easier for the next section of the inner tube 1 to be installed on the previous section of the inner tube 1.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, in step two above, multiple connectors 5 are spaced apart along the circumference of the inner tube 1. The two ends of each connector 5 are connected to the outer circumferential wall of the inner tube 1 and the inner circumferential wall of the outer tube 2, respectively. By setting multiple connectors 5, the connection between the inner tube 1 and the outer tube 2 can be strengthened, and the contact area between them can be increased, improving the stability of the entire structure. Furthermore, it can further ensure that the inner tube 1 and the outer tube 2 are coaxially installed, guaranteeing the construction quality of the concentric double-tube structure. By spaced the connectors 5 along the circumference of the inner tube 1, the load can be evenly distributed between the inner tube 1 and the outer tube 2, helping to avoid local overload and stress concentration, and improving the overall performance of the structure.

[0053] Specifically, such as Figures 1-7 As shown, in step three above, the inner tube 1 is provided with an ear plate 6, one end of the movable working frame 4 is screwed to the ear plate 6, and the other end is attached to the top of the outer tube 2. By providing an ear plate 6 on the inner tube 1 and connecting the movable working frame 4 to the ear plate 6, the stability of the entire structure can be increased. By screwing one end of the movable working frame 4 to the ear plate 6 and attaching the other end to the top of the outer tube 2, the installation and disassembly of the movable working frame 4 can be facilitated, thereby improving construction efficiency and saving construction costs.

[0054] More specifically, there are multiple ear plates 6, which are spaced apart along the circumference of the inner tube 1 on the outer peripheral wall of the inner tube 1 to ensure the connection strength between the movable work frame 4 and the inner tube 1 and to ensure work safety.

[0055] Specifically, such as Figures 1-7 As shown, in step three above, the movable work frame 4 includes a horizontal plate 41 and a vertical plate 42. The horizontal plate 41 is connected to the vertical plate 42 and is erected on the top of the outer tube 2. The vertical plate 42 is screwed onto the ear plate 6 on the inner tube 1 and extends along the axial direction of the inner tube 1. This arrangement increases the stability and load-bearing capacity of the movable work frame 4, ensuring the safety of workers operating on it. Simultaneously, the horizontal plate 41 erected on the top of the outer tube 2 increases the working space, facilitating worker operations and aiding in the installation, disassembly, and subsequent maintenance of the movable work frame 4.

[0056] More specifically, such as Figure 7 As shown, the movable work frame 4 also includes a diagonal brace 43, the two ends of which are connected to the horizontal plate 41 and the vertical plate 42 respectively, thereby increasing the connection strength between the horizontal plate 41 and the vertical plate 42.

[0057] Specifically, the multiple inner pipe sections 1 and the multiple outer pipe sections 2 are in one-to-one correspondence. Adjacent inner pipe sections 1 are connected by welding, and adjacent outer pipe sections 2 are connected by welding to ensure the connection strength of the above components and improve the construction quality of the concentric double pipe structure.

[0058] Specifically, after all the inner pipes 1 and outer pipes 2 are assembled, concrete can be poured between the inner pipes 1 and outer pipes 2 to tightly connect them together and form an integral structure, thereby improving the integrity and stability of the concentric double pipe structure and enhancing its load-bearing capacity.

[0059] It should be noted that the construction method of the concentric double-tube structure in this embodiment analyzes the cross-sectional form of the structure, divides the concentric double-tube structure into an inner tube 1 and an outer tube 2, and uses the inner tube 1 and the outer tube 2 at different heights to facilitate the connection and assembly of each component. The use of the movable work frame 4 for staggered construction creates a favorable working space for the workers, thereby achieving precise assembly and construction of the concentric double-tube structure.

[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 implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A construction method for a concentric double-tube structure, characterized in that, include: Step 1: Divide the concentric double-tube structure into multiple inner tubes (1) and multiple outer tubes (2), and pre-install a fixed work frame (3) on each outer tube (2); Step 2: On the working surface, coaxially install one section of inner tube (1) into one section of outer tube (2) in the vertical direction; Step 3: After the inner tube (1) and outer tube (2) are installed, the movable work frame (4) is detachably installed on the inner tube (1) and outer tube (2). Through the movable work frame (4), the next section of inner tube (1) is installed on the top of the previous section of inner tube (1). Step 4: Disassemble the movable work frame (4), and install the next section of outer pipe (2) onto the top of the previous section of outer pipe (2) using the fixed work frame (3); Repeat steps three to four. As each inner tube (1) and outer tube (2) is installed alternately, the installation position of the movable work frame (4) is continuously raised until the assembly of all inner tubes (1) and outer tubes (2) is completed. In step two, the inner tube (1) is higher than the outer tube (2) and extends out from the outer tube (2); In step three, the inner tube (1) is provided with an ear plate (6), one end of the movable work frame (4) is screwed to the ear plate (6), and the other end is placed on the top of the outer tube (2).

2. The construction method of the concentric double-tube structure according to claim 1, characterized in that, In step one, a mechanical analysis is performed on the cross-section of the concentric double tube structure to determine the segment length of each inner tube (1) and outer tube (2).

3. The construction method of the concentric double-tube structure according to claim 1, characterized in that, In step one, the fixed work frame (3) includes a fixed plate (31) and a reinforcing rib (32). The fixed plate (31) is fixedly connected to the outer peripheral wall of the outer tube (2), and the two ends of the reinforcing rib (32) are respectively connected to the outer tube (2) and the fixed plate (31).

4. The construction method of the concentric double-tube structure according to claim 1, characterized in that, In step two, multiple connectors (5) are arranged at intervals along the circumference of the inner tube (1), and the two ends of the connectors (5) are respectively connected to the outer circumferential wall of the inner tube (1) and the inner circumferential wall of the outer tube (2).

5. The construction method of the concentric double-tube structure according to claim 1, characterized in that, In step three, the movable work frame (4) includes a horizontal plate (41) and a vertical plate (42). The horizontal plate (41) is connected to the vertical plate (42) and is erected on the top of the outer tube (2). The vertical plate (42) is screwed onto the inner tube (1) and extends along the axial direction of the inner tube (1).

6. The construction method of the concentric double-tube structure according to claim 5, characterized in that, The mobile work frame (4) also includes a diagonal brace (43), the two ends of which are connected to the horizontal plate (41) and the vertical plate (42) respectively.

7. The construction method of the concentric double-tube structure according to claim 1, characterized in that, The multiple inner tubes (1) and the multiple outer tubes (2) are in one-to-one correspondence. The two adjacent inner tubes (1) are connected by welding, and the two adjacent outer tubes (2) are connected by welding.

8. The construction method of the concentric double-tube structure according to any one of claims 1-7, characterized in that, After all the inner pipes (1) and outer pipes (2) are assembled, concrete can be poured between the inner pipes (1) and outer pipes (2).

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