Suspended steel structure construction device and construction method

Abstract

Disclosed are a suspended steel structure construction device and construction method. A suspended steel structure comprises a lifting layer (10) and a non-lifting layer (20). The suspended steel structure construction device comprises a core tube (1), joint supporting structures (3), a bottom temporary supporting structure (2), a roof steel truss (4), and a roof lifting structure (5). The joint supporting structures (3) are arranged between the lifting layer (10) and the non-lifting layer (20), each joint supporting structure (3) comprises connecting plates (31), a first end of a connecting plate (31) is detachably connected to the non-lifting layer (20), and a second end of the connecting plate (31) is detachably connected to the lifting layer (10); the bottom temporary supporting structure (2) is arranged around the core tube (1) and can support the lifting layer (10); the roof steel truss (4) is arranged at the top of the core tube (1) and is fixedly connected to the non-lifting layer (20); and the roof lifting structure (5) is arranged on the roof steel truss (4) and can be connected to the lifting layer (10).

Description

Suspended steel structure construction device and construction method

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 13, 2023, with application number 202311180460.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of building construction technology, for example, to a suspended steel structure construction device and a construction method. Background Art

[0003] For high-rise buildings, the roof steel truss structure is often supported on top of the core tube. Floor loads are cumulatively transmitted upwards through the structural steel columns of the suspended layers, reaching the roof steel trusses. From there, they are transmitted through the core tube to the foundation, the load-bearing structure below ground level. Suspended steel structures, consisting of multiple suspended floors, are gaining widespread application due to their clear load distribution, small steel column cross-sections, and large floor space.

[0004] The most common construction method for suspended steel structure systems is the sequential construction method, which involves constructing layer by layer from bottom to top until it is connected to the roof steel truss. The suspended steel structure is then passively unloaded to achieve a transformation in the stress state of the outer frame floor. When this method is used for construction, the stress of the suspended steel structure can be transformed, but the vertical deformation value of the floor is difficult to control, and it is only suitable for suspended structures with partial floors or fewer suspended floors. For super-high-rise, full-floor suspended structures, since the stress of the components increases with the increase in floors and the vertical deformation value is large, this passive unloading method is no longer applicable.

[0005] Currently, when constructing this type of ultra-high, full-floor suspended structure, the following method is mainly used: after constructing the suspended steel structure layer by layer from bottom to top using a sequential construction method, temporary support steel columns are set on the suspended steel structure, and then the subsequent roof steel trusses are installed. After the roof steel trusses are installed, the temporary support steel columns are removed, and the suspended steel structure is lifted in situ as a whole to complete the stress state transformation of the suspended steel structure. After the lifting is completed, a section of structural steel columns is inserted between the suspended steel structure and the roof steel trusses and fixed. In this method, because the deformation between floors is difficult to control after the suspended steel structure is lifted as a whole, the length of the structural steel columns is difficult to determine, which increases the difficulty of inserting the structural steel columns here, affecting the construction efficiency of the suspended structure.

[0006] Summary of the Invention

[0007] The present application provides a suspended steel structure construction device for constructing a suspended steel structure, which can complete the stress state transformation of the suspended steel structure and has low construction difficulty.

[0008] This application adopts the following technical solutions:

[0009] A suspended steel structure construction device is used to construct a suspended steel structure. The suspended steel structure includes a lifting layer and a non-lifting layer. The suspended steel structure construction device includes a core tube, a node support structure, a bottom temporary support structure, a roof steel truss and a roof lifting structure. The node support structure is arranged between the lifting layer and the non-lifting layer. The node support structure includes a connecting plate. The first end of the connecting plate is detachably connected to the non-lifting layer, and the second end of the connecting plate is detachably connected to the lifting layer; the bottom temporary support structure is arranged around the core tube and can support the lifting layer; the roof steel truss is arranged at the top of the core tube and fixedly connected to the non-lifting layer; the roof lifting structure is arranged on the roof steel truss and can be connected to the lifting layer to lift the lifting layer in situ.

[0010] The two ends of the connecting plate are detachably connected to the structural steel columns of the non-lifting layer and the structural steel columns of the lifting layer through fasteners.

[0011] The roof lifting structure includes a power lifting device and a flexible lifting line. The first end of the flexible lifting line is connected to the power lifting device, and the second end of the flexible lifting line can be connected to the pulling layer.

[0012] The power lifting equipment is a jack and the flexible lifting line is a steel wire rope.

[0013] Multiple sets of power lifting equipment are installed on the roof steel trusses, and the flexible lifting lines and power lifting equipment are set in one-to-one correspondence. Multiple sets of power lifting equipment can simultaneously lift the non-lifting layer.

[0014] The present application provides a construction method for a suspended steel structure, which utilizes the above-mentioned construction device for a suspended steel structure for construction, comprising:

[0015] A temporary bottom support structure and a core tube structure are provided, wherein the temporary bottom support structure is provided around the core tube structure;

[0016] On the temporary support structure at the bottom, build the steel structure of the construction floor from bottom to top to the mth floor, n>m>0, n is the total number of suspended floors, and m is an integer;

[0017] Installing connecting plates on the structural steel columns of the steel structure on the mth floor using fasteners;

[0018] The connecting support steel column can be disassembled at the top of the connecting plate. There is a gap between the supporting steel column and the structural steel column of the m-th floor steel structure. The roof steel truss and the steel structure above the m-th floor are continued to be constructed. The connecting plate is used as the boundary. The steel structure below the connecting plate is the pulling layer, and the steel structure above the connecting plate is the non-pulling layer. The supporting steel column serves as the structural steel column of the non-pulling layer and can support the roof steel truss.

[0019] Remove the connecting plate and complete the unloading of the non-lifting layer and roof steel trusses;

[0020] Install the roof lifting structure on the roof steel truss, connect the roof lifting structure and the lifting layer, and lift the lifting layer in situ;

[0021] After the pulling is completed, the structural steel columns and the supporting steel columns of the pulling layer are fixed to form a whole with the non-pulling layer;

[0022] Unload the temporary bottom support structure and roof lifting structure to complete the construction of the floor suspended steel structure.

[0023] After the pulling is completed, the structural steel columns and supporting steel columns of the pulling layer are fixedly connected, including: after the pulling is completed, the structural steel columns and supporting steel columns of the pulling layer are fixedly connected using connecting plates and fasteners, wherein the connecting plates are provided with multiple mounting holes arranged at intervals along the axial direction of the core tube for the fasteners to pass through.

[0024] The roof lifting structure is connected to the lifting layer, including: connecting the roof lifting structure and the mth layer steel structure.

[0025] The non-lifting layer is constructed using the reverse method.

[0026] 3≥nm>0. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the construction of a temporary bottom support structure in an embodiment of the present application;

[0028] FIG2 is a schematic diagram of the construction of the pulling layer in an embodiment of the present application;

[0029] FIG3 is a construction diagram of the connection between the pulling layer and the supporting steel column through the node support structure in an embodiment of the present application;

[0030] FIG4 is a schematic structural diagram of a node support structure in an embodiment of the present application;

[0031] FIG5 is a schematic diagram of the construction of the node support structure unloading in an embodiment of the present application;

[0032] FIG6 is a schematic diagram of the construction of the in-situ lifting layer in an embodiment of the present application;

[0033] FIG7 is a schematic diagram of the construction of the fixed connection between the pulling layer and the non-pulling layer in an embodiment of the present application;

[0034] FIG8 is a construction diagram of unloading of the bottom temporary support structure in an embodiment of the present application.

[0035] In the figure: 1. Core tube; 2. Bottom temporary support structure; 3. Node support structure; 31. Connecting plate; 32. Fasteners; 4. Roof steel truss; 5. Roof lifting structure;

[0036] 10. Pulling layer; 20. Non-pulling layer; 21. Supporting steel column. DETAILED DESCRIPTION

[0037] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., regarding orientations or positions, are based on the orientations or positions shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0040] Figures 1 to 8 show a suspended steel structure construction device and construction method proposed in one of the embodiments of the present application. The construction device can complete the installation of the suspended steel structure. The suspended steel structure includes two separately arranged parts, namely a pulling layer 10 and a non-pulling layer 20. The suspended steel structure construction device includes a core tube 1, a bottom temporary support structure 2, a roof steel truss 4, a node support structure 3 and a roof lifting structure 5. The core tube 1 is arranged in the vertical direction as the construction basis of the suspended steel structure. The non-pulling layer 20 and the pulling layer 10 of the suspended steel structure are constructed around the core tube 1. The bottom temporary support structure 2 is arranged around the bottom of the core tube 1 with the core tube 1 as the center. The pulling layer 10 is constructed from above the bottom temporary support structure 2. The bottom temporary support structure 2 can support the pulling layer 10. The roof steel truss 4 is arranged at the top of the core tube 1. The non-pulling layer 20 is arranged below the roof steel truss 4 and is connected to the roof steel truss. 4 is fixedly connected. The node support structure 3 includes a connecting plate 31. One end of the connecting plate 31 is detachably connected to the pulling layer 10, and the other end is detachably connected to the non-pulling layer 20. The connecting plate 31 can transfer the pressure of the non-pulling layer 20 to the pulling layer 10. In addition, the setting of the connecting plate 31 can form a gap between the pulling layer 10 and the non-pulling layer 20, providing a vertical deformation space for the later stage. The roof lifting structure 5 is set on the roof steel truss 4 and can be connected to the pulling layer 10 to lift the pulling layer 10 in situ.

[0041] The above-mentioned suspended steel structure construction device utilizes the connecting plate 31 to divide the suspended steel structure to be constructed into two units, a pulling layer 10 and a non-pulling layer 20. When the non-pulling layer 20 and the roof steel truss 4 are constructed, the pressure is transferred from the non-pulling layer 20 to the pulling layer 10 to provide support for the non-pulling layer 20. After the construction is completed, the connecting plate 31 is removed and the pulling layer 10 is pulled in situ. The gap between the non-pulling layer 20 and the pulling layer 10 disappears under the vertical deformation of the non-pulling layer 20 and the in-situ pulling action of the pulling layer 10. The non-pulling layer 20 and the pulling layer 10 are fixedly connected to the pulling layer 10 so that the non-pulling layer 20 and the pulling layer 10 are connected into a whole. There is no need to embed structural steel columns between the two, thereby reducing construction costs and construction difficulty.

[0042] In this embodiment, one end of the connecting plate 31 is detachably connected to the structural steel column of the non-lifting layer 20 through a fastener 32, and the other end is detachably connected to the structural steel column of the lifting layer 10 through a fastener 32. Exemplarily, the fastener 32 is a high-strength bolt, and the number of fasteners 32 is set to be multiple, and they are arranged at intervals along the axial direction of the structural steel column. The two ends of the length of the connecting plate 31 are respectively connected to the structural steel column of the lifting layer 10 and the structural steel column of the non-lifting layer 20. At the same time, a reinforcing rib is also provided on one side of the connecting plate 31 to meet the load requirements of the roof steel truss 4 and the non-lifting layer 20.

[0043] The roof lifting structure 5 in this embodiment includes a power lifting device and a flexible lifting line. One end of the flexible lifting line is connected to the power lifting device, and the other end is connected to the lifting layer 10. The power lifting device can be a jack or an electric winch. In this embodiment, the power lifting device is a jack, and the flexible lifting line is a steel strand. Multiple groups of power lifting devices are arranged at intervals on the roof steel truss 4. The flexible lifting lines correspond one-to-one with the power lifting devices. When the lifting layer 10 is lifted, all power lifting devices are controlled to lift the lifting layer 10 synchronously, ensuring that the lifting layer 10 is subjected to stable force.

[0044] Another embodiment of the present application further provides a construction method for a suspended steel structure, which is constructed using the above-mentioned construction device for the suspended steel structure. The construction method includes the following steps:

[0045] S1. Set up a bottom temporary support structure 2 and a core tube 1, where the core tube 1 is located at the center of the bottom temporary support structure 2. The height of the bottom temporary support structure 2 needs to meet the requirements of the designed hanging steel structure. It can be a steel structure or a reinforced concrete structure.

[0046] S2. Build the steel structure of the construction floors from bottom to top on the temporary support structure 2 at the bottom, up to the mth floor, where n>m>0, n is the total number of suspended floors, and m is an integer.

[0047] S3, using fasteners 32 to install the connecting plate 31 on the structural steel column of the m-th floor steel structure;

[0048] S4. The supporting steel column 21 is detachably connected to the top of the connecting plate 31. There is a gap between the supporting steel column 21 and the structural steel column of the m-th steel structure. The construction of the roof steel truss 4 and the steel structure above the m-th floor is continued. The connecting plate 31 is used as the boundary. The suspended steel structure below the connecting plate 31 is the pulling layer 10, and the suspended steel structure above the connecting plate 31 is the non-pulling layer 20. The supporting steel column 21 serves as the structural steel column of the non-pulling layer and can support the roof steel truss 4. The pressure of the non-pulling layer 20 is transferred to the steel structure of the pulling layer 10 by the connecting plate 31. The connecting plate 31 plays a role of temporary support. Moreover, the connecting plate 31 creates a certain gap between the pulling layer 10 and the non-pulling layer 20 along the axial direction of the core tube 1. The gap is set according to the vertical deformation obtained by the simulation analysis in the early stage of construction (the vertical deformation includes the vertical deformation value of the pulling layer 10 and the vertical deformation value of the non-pulling layer 20 after unloading).

[0049] In this embodiment, considering the controllable degree of vertical deformation of the non-pulling layer 20 and the roof steel truss 4, 3≥nm>0.

[0050] In this step, when the number of non-pulling layers 20 is more than 2, the non-pulling layer 20 is constructed using a reverse method to put the non-pulling layer 20 in a tensile state, avoiding the subsequent stress state conversion. That is to say, the construction of the suspended steel structure in this embodiment is carried out in a forward and reverse combination manner.

[0051] The two ends of the connecting plate 31 in the node support structure 3 are detachably connected to the pulling layer 10 and the supporting steel column 21 respectively through high-strength bolts. It should be noted that the high-strength bolts are finally tightened at this stage.

[0052] S5. Dismantle the node support structure 3 and complete the unloading of the non-lifting layer 20 and the roof steel truss 4.

[0053] S6. Install the roof lifting structure 5 on the roof steel trusses 4 and connect the roof lifting structure 5 to the lifting layer 10 to lift the lifting layer 10 in situ. The roof lifting structure 5 is connected to the mth layer of the lifting layer 10 to lift all floors of the lifting layer 10, thereby completing the transition of the lifting layer 10 from a compressive state to a tensile state.

[0054] S7, fix the structural steel columns and support steel columns 21 of the pulling layer 10, so that the pulling layer 10 and the non-pulling layer 20 are fixed as a whole. It can be understood that the gap set between the non-pulling layer 20 and the pulling layer 10 disappears under the vertical deformation of the non-pulling layer 20 and the in-situ pulling deformation of the pulling layer 10. At this time, the two structural steel columns can be connected by welding. Alternatively, in this embodiment, the structural steel columns and support steel columns 21 of the pulling layer 10 are still connected by bolts through the connecting plate 31 to improve the utilization efficiency of the connecting plate 31 and reduce construction costs. It should be emphasized that a plurality of mounting holes arranged at intervals along the axial direction of the core tube 1 are provided on the connecting plate 31 for high-strength bolts to pass through.

[0055] S8. Unload the bottom temporary support structure 2 to fully release the residual stress of the lifting layer 10 structure, and simultaneously unload the roof lifting structure 5 to complete the construction of the floor suspended steel structure.

[0056] In the above-mentioned method of construction of suspended steel structure, the node support structure 3 is put into use, so that the structural steel columns of the non-lifting layer 20 are directly used as the construction support of the roof steel truss 4, replacing the temporary support steel columns in the relevant technology. There is no need to replace the temporary support steel columns with the structural steel columns in the later stage, which greatly optimizes the temporary support measures under the lifting conditions of the suspended steel structure and reduces the construction difficulty.

[0057] The above-mentioned suspended steel structure construction device and construction method in the embodiment of the present application divide the suspended steel structure into two units, a pulling layer and a non-pulling layer, for separate construction, and use a node temporary support device to detachably connect the pulling layer and the non-pulling layer. When the node temporary support is unloaded and the pulling layer is lifted in situ, the gap between the pulling layer and the non-pulling layer disappears, and there is no need to use temporary support steel columns to fill the gap. This eliminates the material loss of the temporary support steel columns, simplifies the construction of the suspended steel structure, and reduces the construction difficulty and construction cost.

Claims

1. A suspended steel structure construction device, configured to construct a suspended steel structure, wherein the suspended steel structure comprises a lifting layer (10) and a non-lifting layer (20), and the suspended steel structure construction device comprises: A node support structure (3) is arranged between the pulling layer (10) and the non-pulling layer (20), and the node support structure (3) comprises a connecting plate (31), a first end of the connecting plate (31) is detachably connected to the non-pulling layer (20), and a second end of the connecting plate (31) is detachably connected to the pulling layer (10); Core tube (1); A temporary bottom support structure (2), which is arranged around the core tube (1) and can support the pulling layer (10); A roof steel truss (4) is arranged on the top of the core tube (1) and is fixedly connected to the non-lifting layer (20); A roof lifting structure (5) is arranged on the roof steel truss (4) and can be connected to the lifting layer (10) to lift the lifting layer (10) in situ.

2. The suspended steel structure construction device according to claim 1, wherein: The two ends of the connection plate (31) are respectively connected to the structural steel column of the pulling layer (10) and the structural steel column of the non-pulling layer (20) through fasteners (32).

3. The suspended steel structure construction device according to claim 2, wherein: The roof lifting structure (5) comprises a power lifting device and a flexible lifting line, wherein a first end of the flexible lifting line is connected to the power lifting device, and a second end of the flexible lifting line can be connected to the lifting layer (10).

4. The suspended steel structure construction device according to claim 3, wherein: The power lifting device is a jack, and the flexible lifting line is a steel strand.

5. The suspended steel structure construction device according to claim 3, wherein: A plurality of groups of the power lifting equipment are arranged on the roof steel truss (4), the flexible lifting lines are arranged in one-to-one correspondence with the power lifting equipment, and the plurality of groups of the power lifting equipment can synchronously lift the non-lifting layer (20).

6. A method for constructing a suspended steel structure, using the construction device for a suspended steel structure according to any one of claims 2 to 5, the method comprising: A bottom temporary support structure (2) and a core tube (1) are provided, wherein the bottom temporary support structure (2) is provided around the core tube (1); On the bottom temporary support structure (2), a steel structure of the construction floor is constructed from bottom to top to the mth floor, where n is the total number of suspended floors, m is an integer, and n>m>0; Installing a connection plate (31) on the structural steel column of the m-th layer steel structure using fasteners (32); The top of the connecting plate (31) is detachably connected to the supporting steel column (21), and there is a gap between the supporting steel column (21) and the structural steel column of the mth layer. The roof steel truss (4) and the steel structure above the mth layer are continuously constructed. The connecting plate (31) is used as a boundary. The steel structure below the connecting plate (31) is the pulling layer (10), and the steel structure above the connecting plate (31) is the non-pulling layer (20). The supporting steel column (21) serves as the structural steel column of the non-pulling layer (20) and can support the roof. Surface steel trusses (4); The connecting plate (31) is removed to complete the unloading of the non-lifting layer (20) and the roof steel truss (4); Installing a roof lifting structure (5) on the roof steel truss (4), connecting the roof lifting structure (5) and the lifting layer (10), and lifting the lifting layer (10) in situ; After the pulling is completed, the structural steel column of the pulling layer (10) and the supporting steel column (21) are fixedly connected, so that the pulling layer (10) and the non-pulling layer (20) are fixedly connected as a whole; The bottom temporary support structure (2) and the roof lifting structure (5) are unloaded to complete the construction of the floor suspended steel structure.

7. The construction method of the suspended steel structure according to claim 6, wherein: After the pulling is completed, the structural steel column and the supporting steel column (21) fixedly connected to the pulling layer (10) include: After the pulling is completed, the structural steel column of the pulling layer (10) and the supporting steel column (21) are fixedly connected by the connecting plate (31) and the fastener (32), wherein the connecting plate (31) is provided with a plurality of mounting holes arranged at intervals along the axial direction of the core tube (1) for the fastener (32) to pass through.

8. The construction method of a suspended steel structure according to claim 6, wherein: The connecting means for connecting the roof lifting structure (5) and the lifting layer (10) comprises: Connect the roof lifting structure (5) and the m-th layer of steel structure.

9. The construction method of a suspended steel structure according to claim 6, wherein: The non-pulling layer (20) is constructed using a reverse method.

10. The construction method of a suspended steel structure according to claim 6, wherein: 3≥nm>0.

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