Construction device and construction method for suspended steel structures

Abstract

The present invention discloses a construction apparatus and construction method for a suspended steel structure, wherein the suspended steel structure comprises a lifting layer (10) and a non-lifting layer (20), and the construction apparatus for the suspended steel structure comprises a core tube (1), a nodal support structure (3), a bottom temporary support structure (2), a roof steel truss (4), and a roof lift structure (5), wherein the nodal support structure (3) is provided between the lifting layer (10) and the non-lifting layer (20), and the nodal support structure (3) comprises a connecting plate (31), and the connecting plate The first end of (31) is detachably connected to the non-lifting layer (20), the second end of the connecting plate (31) is detachably connected to the lifting layer (10), the bottom temporary support structure (2) is provided surrounding the core tube (1) and can support the lifting layer (10), the roof steel truss (4) is provided at the top of the core tube (1) and fixed to the non-lifting layer (20), and the roof lift structure (5) is provided on the roof steel truss (4) and can be connected to the lifting layer (10).

Description

Technical Field

[0001] This application claims priority to a Chinese patent application with application number 202311180460.2 filed with the Chinese Patent Office on September 13, 2023, and incorporates all the contents of this application by reference.

[0002] This application relates to the technical field of building construction, for example, to a construction device and a construction method for a suspended steel structure.

Background Art

[0003] For high-rise buildings, the roof steel truss structure is often supported at the top of the core tube. The floor load accumulates upwards layer by layer through the structural steel columns of the suspended floor and is transmitted to the roof steel truss, and then transmitted to the foundation through the core tube. The foundation is the load-bearing structure below the ground of the building. The suspended steel structure is composed of multiple suspended floor structures. The suspended steel structure has advantages such as clear force-bearing, small cross-section of steel columns, and large floor space, and is gradually being widely applied.

[0004] The most common construction method for the suspended steel structure system is the progressive construction method. Construction is carried out layer by layer from the bottom up until it is connected to the roof steel truss. Then, the suspended steel structure is passively unloaded to achieve the conversion of the force-bearing state of the outer frame layer. When building using such a method, the stress of the suspended steel structure can be converted, but it is difficult to control the vertical deformation value of the layer. Moreover, it is applicable to a suspended structure where some layers are suspended or the number of suspended layers is small. In the case of a fully suspended structure for all floors of a super high-rise building, the stress of the members increases significantly with the increase in the number of layers, and the vertical deformation value is large. Therefore, such a passive unloading method is no longer applicable.

[0005] Currently, when constructing the suspended structure for all floors of such skyscrapers, the following method is mainly employed: After constructing the suspended steel structure floor by floor from bottom to top using the forward construction method, temporary support steel columns are installed on the suspended steel structure, and the subsequent roof steel trusses are attached. After the installation of the roof steel trusses is complete, the temporary support steel columns are removed, and the entire suspended steel structure is lifted in place to complete the change in the load-bearing state of the suspended steel structure. After the lifting is complete, structural steel columns are fitted between the suspended steel structure and the roof steel trusses and fixed in place to complete the process. In this method, after the lifting of the entire suspended steel structure is complete, it is difficult to control the deformation between floors, making it difficult to determine the length of the structural steel columns, which increases the difficulty of fitting the structural steel columns at this stage and affects the construction efficiency of the suspended structure. [Overview of the project] [Problems that the invention aims to solve]

[0006] This invention provides a construction device for suspended steel structures that can be used in the construction of suspended steel structures, can complete the conversion of the load-bearing state of the suspended steel structure, and further reduces the difficulty of construction. [Means for solving the problem]

[0007] This application proposes the following technical solutions.

[0008] A construction device for a suspended steel structure, comprising a core tube, a nodal support structure, a bottom temporary support structure, a roof steel truss, and a roof lift structure, wherein the nodal support structure is provided between the suspended layer and the non-suspended layer, and the nodal support structure is provided with connecting plates, the first end of which is detachably connected to the non-suspended layer, and the second end of which is detachably connected to the suspended layer, the bottom temporary support structure is provided surrounding the core tube and can support the suspended layer, the roof steel truss is provided at the top of the core tube and fixed to the non-suspended layer, and the roof lift structure is provided on the roof steel truss and can be connected to the suspended layer in order to lift the suspended layer in place. A construction device for suspended steel structures.

[0009] Both ends of the connecting plate are detachably connected to the structural steel columns of the non-lifted layer and the structural steel columns of the lifted layer, respectively, by fasteners.

[0010] The roof lift structure includes powered lifting equipment and a flexible lift wire. The first end of the flexible lift wire is connected to the powered lifting equipment, and the second end of the flexible lift wire can be connected to the lifting layer.

[0011] Powered lifting equipment consists of jacks, and flexible lifting wires consist of stranded steel wires.

[0012] Multiple groups of powered lifting equipment are installed on the roof steel truss, and flexible lift lines are provided in a one-to-one correspondence with the powered lifting equipment, allowing the multiple groups of powered lifting equipment to lift non-lifting layers synchronously.

[0013] This application is, A method for constructing a suspended steel structure using the above-mentioned construction device for suspended steel structures, A bottom temporary support structure and a core tube structure are provided, with the bottom temporary support structure surrounding the core tube structure. In a temporary support structure at the bottom, the steel structure is constructed from bottom to top using a sequential construction method up to the mth floor, where n > m > 0, where n is the total number of floors suspended, and m is an integer. The process involves attaching connecting plates to the structural steel columns of the steel structure on the mth floor using fasteners, A support steel column is detachably connected to the tip of the connecting plate, there is a gap between the support steel column and the structural steel column of the steel structure on the mth floor, and construction of the roof steel truss and the steel structure on the mth floor and above continues, with the connecting plate as the boundary, the steel structure below the connecting plate is the raised layer, the steel structure above the connecting plate is the non-raised layer, and the support steel column can support the roof steel truss as a structural steel column of the non-raised layer. Remove the connecting plates and complete the unloading of the non-lifted layers and roof steel trusses. The roof lift structure is attached to the roof steel truss, the roof lift structure is connected to the lifting layer, and the lifting layer is raised in place. After the lifting is complete, the structural steel columns and support steel columns of the lifted layer are fixed together, and the lifted layer and the non-lifted layer are fixed together as a single unit. This includes unloading the temporary support structure at the bottom and the roof lift structure, and completing the construction of the suspended steel structure for each floor. This document provides a construction method for suspended steel structures.

[0014] After the lifting is complete, fixing the structural steel columns and support steel columns of the lifted layer includes connecting and fixing the structural steel columns and support steel columns of the lifted layer using connecting plates and fasteners, the connecting plates having multiple mounting holes provided at intervals along the axial direction of the core tube for fasteners to pass through.

[0015] Connecting the roof lift structure to the lifting layer includes connecting the roof lift structure to the steel structure of the mth floor.

[0016] The non-lifted layers will be constructed using the top-down construction method.

[0017] 3 ≥ nm > 0. [Brief explanation of the drawing]

[0018] [Figure 1] This is a schematic diagram illustrating the construction of the temporary support structure at the bottom in an embodiment of the present invention. [Figure 2] This is a schematic diagram of the construction of the lifting layer in the embodiment of the present invention. [Figure 3] This is a schematic diagram of the construction in which the lifting layer and the support steel column are connected by a nodal support structure in an embodiment of the present invention. [Figure 4] This is a schematic diagram of the nodal support structure in an embodiment of the present invention. [Figure 5] This is a schematic diagram illustrating the unloading of the nodal support structure in an embodiment of the present invention. [Figure 6] This is a schematic diagram of the construction process for lifting the lifting layer in place in an embodiment of the present invention. [Figure 7]It is a construction schematic diagram for fixing the lifting layer and the non-lifting layer in the embodiment of the present application. [Figure 8] It is a construction schematic diagram for unloading the bottom temporary support structure in the embodiment of the present application.

Explanation of Reference Signs

[0019] 1 Core Tube 2 Bottom Temporary Support Structure 3 Node Support Structure 31 Connection Plate 32 Fastener 4 Roof Steel Truss 5 Roof Lift Structure 10 Lifting Layer 20 Non-lifting Layer 2i Support Steel Column

Embodiments for Carrying out the Invention

[0020] [[ID=3z]] In the description of the present application, unless there are specific regulations and limitations, the terms "connection", "coupling", and "fixing" should be interpreted in a broad sense. For example, it may be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a relationship of internal communication between two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0021] It should be noted that in the translation, "2i" in item might be a misprint in the original text. It is translated as "2i" here according to the original content. If it is an incorrect expression, it needs to be further confirmed according to the actual situation.In this application, unless otherwise specifically defined and limited, the presence of a first feature "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features via other features between them, rather than direct contact. Furthermore, the presence of a first feature "above," "above," and "on the top surface" of a second feature includes the first feature being directly above and diagonally above the second feature, or simply indicates that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "on the bottom surface" of a second feature includes the first feature being directly below and diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0022] In the description of this embodiment, terms such as "up," "down," "left," and "right," which refer to directions or positional relationships, are used to facilitate explanation and simplify operation based on the directions or positional relationships shown in the drawings. They do not indicate or imply that the device or element being referred to necessarily has a specific direction or needs to be constructed and operated in a specific direction, and therefore should not be understood as limiting the present application. Furthermore, the terms "first" and "second" are merely used for distinction in the description and have no special meaning.

[0023] Figures 1 to 8 show a construction apparatus and construction method for a suspended steel structure submitted in one embodiment of the present application, the construction apparatus being able to complete the installation of the suspended steel structure, the suspended steel structure comprising two separate parts, a lifting layer 10 and a non-lifting layer 20, the construction apparatus for the suspended steel structure comprising a core tube 1, a bottom temporary support structure 2, a roof steel truss 4, a nodal support structure 3, and a roof lift structure 5. The core tube 1 is installed vertically and serves as the construction base for the suspended steel structure. The non-lifted layer 20 and lifted layer 10 of the suspended steel structure are both constructed surrounding the core tube 1. The bottom temporary support structure 2 is installed around the bottom of the core tube 1, with the core tube 1 at its center. Construction of the lifted layer 10 begins from above the bottom temporary support structure 2, and the bottom temporary support structure 2 can support the lifted layer 10. The roof steel truss 4 is installed at the top of the core tube 1, and the non-lifted layer 20 is installed below the roof steel truss 4. The nodal support structure 3 is fixed to the steel truss 4 and includes a connecting plate 31, one end of which is detachably connected to the lifting layer 10 and the other end of which is detachably connected to the non-lifting layer 20, so that the connecting plate 31 can transmit the pressure of the non-lifting layer 20 to the lifting layer 10, and furthermore, the installation of the connecting plate 31 creates a gap between the lifting layer 10 and the non-lifting layer 20, providing vertical deformation space in subsequent processes, and the roof lift structure 5 is provided on the roof steel truss 4 and can be connected to the lifting layer 10 in order to lift the lifting layer 10 in place.

[0024] The above-mentioned construction device for the suspended steel structure divides the suspended steel structure, which requires construction using a connecting plate 31, into two units: a lifted layer 10 and a non-lifted layer 20. During the construction of the non-lifted layer 20 and the roof steel truss 4, pressure is transmitted from the non-lifted layer 20 to the lifted layer 10, providing support to the non-lifted layer 20. After construction is complete, the connecting plate 31 is removed and the lifted layer 10 is lifted in place. The gap between the non-lifted layer 20 and the lifted layer 10 disappears due to the vertical deformation of the non-lifted layer 20 and the lifted layer 10's in-place lifting action, fixing the non-lifted layer 20 and the lifted layer 10 together and connecting them as a single unit. This eliminates the need to fit a structural steel column between them, reducing construction costs and difficulty.

[0025] In this embodiment, one end of the connecting plate 31 is detachably connected to the structural steel column of the non-raised layer 20 by a fastener 32, and the other end is detachably connected to the structural steel column of the raised layer 10 by a fastener 32. Exemplarily, the fastener 32 employs high-strength bolts, and multiple fasteners 32 are provided, spaced apart along the axial direction of the structural steel column. Both ends of the connecting plate 31 are connected to the structural steel column of the raised layer 10 and the structural steel column of the non-raised layer 20, respectively. Additionally, a reinforcing bead is provided on one side of the connecting plate 31 to meet the need to support the loads of the roof steel truss 4 and the non-raised layer 20.

[0026] In this embodiment, the roof lift structure 5 includes power lift equipment and a flexible lift wire. One end of the flexible lift wire is connected to the power lift equipment, and the other end is connected to the lifting layer 10. The power lift equipment may be a jack or an electric hoist. In this embodiment, the power lift equipment is a jack, and in this case, the flexible lift wire is a stranded steel wire. Multiple groups of power lift equipment are provided at intervals on the roof steel truss 4. The flexible lift wire corresponds one-to-one with the power lift equipment. When lifting the lifting layer 10, all the power lift equipment is controlled to lift the lifting layer 10 synchronously, ensuring the stability of the load-bearing capacity of the lifting layer 10.

[0027] In another embodiment of the present invention, a method for constructing a suspended steel structure is further provided, wherein the construction is carried out using the above-mentioned construction device for the suspended steel structure, and the construction method includes the following steps.

[0028] In S1, a bottom temporary support structure 2 and a core tube 1 are provided, where the core tube 1 is located at the center of the bottom temporary support structure 2, and the height of the bottom temporary support structure 2 must meet the needs of the designed suspended steel structure construction method, and may be a steel structure or a reinforced concrete structure.

[0029] In S2, the bottom temporary support structure 2 is constructed using a sequential construction method, with the steel structure of each floor being built from bottom to top up to the mth floor, where n > m > 0, n is the total number of floors suspended, and m is an integer.

[0030] In S3, the connecting plate 31 is attached to the structural steel column of the m-th floor steel structure using fasteners 32.

[0031] In S4, the support steel column 21 is detachably connected to the tip of the connecting plate 31, and there is a gap between the support steel column 21 and the structural steel column of the steel structure on the mth floor. Construction of the roof steel truss 4 and the steel structure on the mth floor and above continues, with the connecting plate 31 as the boundary, the suspended steel structure below the connecting plate 31 is the lifted layer 10, and the suspended steel structure above the connecting plate 31 is the non-lifted layer 20. The support steel column 21 can support the roof steel truss 4 as a structural steel column of the non-lifted layer, the pressure of the non-lifted layer 20 is transmitted to the steel structure of the lifted layer 10 via the connecting plate 31, and the connecting plate 31 acts as a temporary support. Furthermore, the connecting plate 31 provides a constant gap between the lifted layer 10 and the non-lifted layer 20 along the axial direction of the core tube 1, and this gap is provided based on the amount of vertical deformation (the amount of vertical deformation includes the vertical deformation value of the lifted layer 10 and the vertical deformation value of the non-lifted layer 20 after unloading) obtained from simulation analysis in the early stages of construction.

[0032] In this embodiment, considering the controllable degree of vertical deformation of the non-lifted layer 20 and the roof steel truss 4, 3≧nm>0.

[0033] In this step, if the number of non-lifted layers 20 is greater than two, the non-lifted layers 20 are constructed using the reverse construction method, placing the non-lifted layers 20 in a tensile state and avoiding a change in the load-bearing state in the later stages. In other words, the construction of the suspended steel structure in this embodiment is carried out using a forward-reverse connection method.

[0034] In the nodal support structure 3, both ends of the connecting plate 31 are detachably connected to the lifting layer 10 and the support steel column 21 by high-strength bolts. The high-strength bolts are tightened to their final position at this stage.

[0035] In S5, the nodal support structure 3 is removed, and the unloading of the non-lifted layer 20 and the roof steel truss 4 is completed.

[0036] In S6, the roof lift structure 5 is attached to the roof steel truss 4, the roof lift structure 5 is connected to the lifting layer 10, and the lifting layer 10 is lifted in place. The roof lift structure 5 is connected to the mth floor of the lifting layer 10, achieving the lifting of all floors of the lifting layer 10 and completing the transition of the lifting layer 10 from a compressed state to a tensile state.

[0037] In S7, the structural steel columns of the lifted layer 10 and the support steel columns 21 are fixed together, and the lifted layer 10 and the non-lifted layer 20 are fixed together as a single unit. The gap between the non-lifted layer 20 and the lifted layer 10 disappears due to the vertical deformation of the non-lifted layer 20 and the in-situ lifting deformation of the lifted layer 10, and in this case, it can be understood that the two structural steel columns may be connected by welding. Alternatively, in this embodiment, the structural steel columns of the lifted layer 10 and the support steel columns 21 are still connected by a combination of connecting plates 31 and bolts, thereby increasing the utilization efficiency of the connecting plates 31 and reducing construction costs. The connecting plates 31 are provided with multiple mounting holes for high-strength bolts to pass through, which are spaced along the axial direction of the core tube 1.

[0038] In S8, the temporary support structure 2 at the bottom is unloaded, the residual stress in the lifted layer 10 structure is fully released, the roof lift structure 5 is unloaded synchronously, and the construction of the suspended steel structure of each floor is completed.

[0039] In the construction method of the suspended steel structure described above, the introduction of the nodal support structure 3 allows the structural steel columns of the non-lifted layer 20 to directly support the roof steel truss 4 during construction, replacing the temporary support steel columns in related technologies. This eliminates the need to replace the temporary support steel columns with the structural steel columns in subsequent processes, significantly optimizing the temporary support measures during the lifting operation of the suspended steel structure and reducing the difficulty of construction.

[0040] In the embodiment of the present invention, the construction apparatus and method for the suspended steel structure described above divide the suspended steel structure into two units, a lifted layer and a non-lifted layer, and perform the construction on each separately. The lifted layer and the non-lifted layer are detachably connected using a nodal temporary support device. After the nodal temporary support is unloaded and the lifted layer is lifted in place, the gap between the lifted layer and the non-lifted layer disappears, eliminating the need to fit them together using temporary support steel columns. This eliminates material loss of temporary support steel columns, simplifies the construction of the suspended steel structure, and reduces the difficulty and cost of construction.

Claims

1. A construction device for a suspended steel structure, configured to construct a suspended steel structure comprising a lifting layer (10) and a non-lifting layer (20), A nodal support structure (3) is provided between the lifting layer (10) and the non-lifting layer (20), and comprises a connecting plate (31), the first end of which is detachably connected to the non-lifting layer (20), and the second end of which is detachably connected to the lifting layer (10), Core tube (1), A bottom temporary support structure (2) is provided surrounding the core tube (1) and capable of supporting the lifting layer (10), A roof steel truss (4) is provided at the top of the core tube (1) and fixed to the non-raised layer (20), To lift the lifting layer (10) in place, the roof includes a roof lift structure (5) provided on the roof steel truss (4) and connectable to the lifting layer (10). A construction device for suspended steel structures.

2. Both ends of the connecting plate (31) are connected to the structural steel columns of the lifted layer (10) and the structural steel columns of the non-lifted layer (20) by fasteners (32), respectively. A construction device for a suspended steel structure according to claim 1.

3. The roof lift structure (5) comprises a powered lifting device and a flexible lift wire, the first end of the flexible lift wire being connected to the powered lifting device, and the second end of the flexible lift wire being connectable to the lifting layer (10). Construction apparatus for a suspended steel structure as described in claim 2.

4. The aforementioned power lifting device is a jack, and the aforementioned flexible lifting wire is a stranded steel wire. Construction apparatus for a suspended steel structure as described in claim 3.

5. Multiple groups of the power lift equipment are provided on the roof steel truss (4), the flexible lift wires are provided in a one-to-one correspondence with the power lift equipment, and the multiple groups of power lift equipment can synchronously lift the non-lifting layer (20). Construction apparatus for a suspended steel structure as described in claim 3.

6. A method for constructing a suspended steel structure, comprising using a construction device for a suspended steel structure described in any one of claims 2 to 5, A bottom temporary support structure (2) and a core tube (1) are provided, and the bottom temporary support structure (2) is provided surrounding the core tube (1), In the aforementioned bottom temporary support structure (2), the layered steel structure is constructed from bottom to top using the sequential construction method up to the mth floor, where n is the total number of suspended floors, m is an integer, and n > m > 0. The connecting plate (31) is attached to the structural steel column of the mth floor steel structure with fasteners (32), A support steel column (21) is detachably connected to the tip of the connecting plate (31), there is a gap between the support steel column (21) and the structural steel column of the mth floor, and the roof steel truss (4) and the steel structure of the mth floor and above are continuously constructed, with the connecting plate (31) as the boundary, the steel structure below the connecting plate (31) is the raised layer (10), the steel structure above the connecting plate (31) is the non-raised layer (20), and the support steel column (21) can support the roof steel truss (4) as a structural steel column of the non-raised layer (20), The connecting plate (31) is removed, and the unloading of the non-lifted layer (20) and the roof steel truss (4) is completed. The roof lift structure (5) is attached to the roof steel truss (4), the roof lift structure (5) and the lifting layer (10) are connected, and the lifting layer (10) is lifted in place. After the lifting is complete, the structural steel columns of the lifted layer (10) and the support steel columns (21) are fixed together, and the lifted layer (10) and the non-lifted layer (20) are fixed together as a single unit. This includes removing the load from the temporary bottom support structure (2) and the roof lift structure (5), and completing the construction of the suspended steel structure for each floor. Construction method for suspended steel structures.

7. After the lifting is completed, fixing the structural steel columns of the lifted layer (10) and the support steel columns (21) is done as follows: After the lifting is complete, the structural steel columns of the lifted layer (10) and the support steel columns (21) are fixed together using the connecting plate (31) and the fasteners (32), wherein the connecting plate (31) has a plurality of mounting holes provided at intervals along the axial direction of the core tube (1) for the fasteners (32) to pass through. A method for constructing the suspended steel structure according to claim 6.

8. Connecting the roof lift structure (5) and the lifting layer (10) is This includes connecting the roof lift structure (5) and the steel structure of the mth floor, A method for constructing the suspended steel structure according to claim 6.

9. The aforementioned non-lifted layer (20) is constructed using the top-down construction method. A method for constructing the suspended steel structure according to claim 6.

10. 3 ≥ n - m > 0 A method for constructing the suspended steel structure according to claim 6.

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