Suspended steel structure construction device and construction method

Abstract

The present invention belongs to the technical field of building construction, and discloses a suspended steel structure construction device and a construction method, wherein the suspended steel structure includes a lifting layer and a non-lifting layer, and 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, wherein the node support structure is arranged between the lifting layer and the non-lifting layer, and the node support structure includes a connecting plate, one end of the connecting plate is detachably connected to the non-lifting layer, and the other 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 is 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. The present invention also discloses a suspended steel structure construction method, which is constructed by using the above-mentioned suspended steel structure construction device, and the construction difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a suspended steel structure construction device and a construction method. Background Art

[0002] For high-rise buildings, the roof steel truss structure is often supported on the top of the core tube. The floor load is accumulated and transmitted to the roof steel truss layer by layer through the structural steel columns of the hanging layer, and then transmitted to the foundation through the core tube. The suspended steel structure is composed of multiple suspended floor structures. The suspended steel structure has gradually been widely used due to its advantages such as clear force, small steel column section, and large floor space.

[0003] 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, and then passively unloading the suspended steel structure 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 is no longer applicable.

[0004] At present, the following methods are mainly used in the construction of this kind of super-high full-floor suspended structure: after the suspended steel structure is constructed layer by layer from bottom to top by sequential construction, temporary support steel columns are set on the suspended steel structure, and then the subsequent roof steel truss is installed. After the roof steel truss is installed, the temporary support steel columns are removed, and the suspended steel structure is lifted as a whole in situ to complete the stress state conversion of the suspended steel structure. After the lifting is completed, a section of structural steel column is inserted between the suspended steel structure and the roof steel truss 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 column is difficult to determine, which increases the difficulty of embedding the structural steel column here and affects the construction efficiency of the suspended structure. Summary of the invention

[0005] One of the purposes of the present invention is to provide a suspended steel structure construction device, which is used for constructing a suspended steel structure and can complete the stress state transformation of the suspended steel structure with low construction difficulty.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A suspended steel structure construction device is used to construct a suspended steel structure, wherein the suspended steel structure includes a pulling 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 pulling layer and the non-lifting layer. The node support structure includes a connecting plate, one end of the connecting plate is detachably connected to the non-lifting layer, and the other 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 on 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.

[0008] Preferably, both ends of the connecting plate are detachably connected to the structural steel columns of the non-pulling layer and the structural steel columns of the pulling layer through fasteners.

[0009] Preferably, the roof lifting structure comprises 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 can be connected to the lifting layer.

[0010] Preferably, the power lifting equipment is a jack, and the flexible lifting line is a steel strand.

[0011] Preferably, a plurality of groups of the power lifting devices are arranged on the roof steel trusses, the flexible lifting lines are arranged in one-to-one correspondence with the power lifting devices, and the plurality of groups of the power lifting devices can synchronously lift the non-lifting layer.

[0012] Another object of the present invention is to provide a construction method of a suspended steel structure, which is constructed using the above-mentioned construction device for the suspended steel structure. The construction method specifically includes the following steps:

[0013] Providing a bottom temporary support structure and a core tube structure, wherein the bottom temporary support structure is arranged around the core tube structure;

[0014] On the temporary bottom support structure, the steel structures of each floor are constructed from bottom to top to the mth floor, where n>m>0, n is the total number of suspended floors, and m is a constant;

[0015] Install the connection plates on the structural steel columns of the steel structure on the mth floor using fasteners;

[0016] The top of the connecting plate is detachably connected to the supporting steel column, and there is a gap between the supporting steel column and the structural steel column of the m-th layer of steel structure. The roof steel truss and the steel structure above the m-th layer are continuously constructed. The connecting plate is used as a boundary, and 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, as the structural steel column of the non-pulling layer, can support the roof steel truss;

[0017] The connecting plate is removed to complete the unloading of the non-lifting layer and the roof steel truss;

[0018] Installing a roof lifting structure on the roof steel truss, connecting the roof lifting structure and the lifting layer, and lifting the lifting layer in situ;

[0019] After the pulling is completed, the structural steel column of the pulling layer and the supporting steel column are fixedly connected so that the pulling layer and the non-pulling layer are fixedly connected as a whole;

[0020] The bottom temporary supporting structure and the roof lifting structure are unloaded to complete the construction of the floor suspended steel structure.

[0021] Preferably, after the pulling is completed, the structural steel column of the pulling layer and the supporting steel column are connected by means of the connecting plate and the fasteners, and the connecting plate is provided with a plurality of mounting holes which are arranged at intervals along the axial direction of the core tube for the fasteners to pass through.

[0022] Preferably, when the roof lifting structure is connected to the pulling layer, the mth layer of steel structure is connected.

[0023] Preferably, the non-pulling layer is constructed using a reverse method.

[0024] Preferably, 3≥nm>0.

[0025] Beneficial effects of the present invention: the above-mentioned suspended steel structure construction device and construction method divide the suspended steel structure into two units, a pulling layer and a non-pulling layer, for separate construction, and utilize 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a construction schematic diagram of a temporary bottom support structure in an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the construction of the lifting layer in an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the construction of the connection between the lifting layer and the supporting steel column through the node support structure in the embodiment of the present invention;

[0029] Figure 4 is a structural schematic diagram of a node support structure in an embodiment of the present invention;

[0030] Figure 5 is a construction schematic diagram of unloading a node support structure in an embodiment of the present invention;

[0031] Figure 6 is a construction schematic diagram of in-situ lifting of the lifting layer in an embodiment of the present invention;

[0032] Figure 7 1 is a schematic diagram of the construction of the fixed connection between the lifting layer and the non-lifting layer in an embodiment of the present invention;

[0033] Figure 8 It is a construction schematic diagram of unloading the bottom temporary support structure in an embodiment of the present invention.

[0034] In the figure: 1. Core tube; 2. Bottom temporary support structure; 3. Node support structure; 31. Connection plate; 32. Fasteners; 4. Roof steel truss; 5. Roof lifting structure;

[0035] 10. Pulling layer; 20. Non-pulling layer; 21. Supporting steel column. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In the description of this embodiment, the terms "upper", "lower", "left", "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 simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate 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.

[0040] Figure 1-Figure 8 What is shown is a suspended steel structure construction device and a construction method proposed in one of the embodiments of the present invention. The construction device can complete the installation of the suspended steel structure. The suspended steel structure includes two parts that are separately arranged, namely a lifting layer 10 and a non-lifting 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-lifting layer 20 and the lifting 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 lifting layer 10 is constructed from above the bottom temporary support structure 2. The bottom temporary support structure 2 can support the lifting layer 10. The roof steel truss 4 is arranged at the top of the core tube 1. The non-lifting 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, and the setting of the connecting plate 31 can form a gap between the pulling layer 10 and the non-pulling layer 20 to provide a vertical deformation space for the later stage. The roof lifting structure 5 is arranged 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, namely 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 due to the vertical deformation of the non-pulling layer 20 and the in-situ pulling of the pulling layer 10. The non-pulling layer 20 and the pulling layer 10 are fixedly connected to each other so that the non-pulling layer 20 and the pulling layer 10 are connected as a whole. There is no need to embed a structural steel column between the two, thereby reducing the construction cost and 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 pulling layer 10. Optionally, 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, and the flexible lifting lines correspond to the power lifting devices one by one. When the pulling layer 10 is lifted, all the power lifting devices are controlled to synchronously lift the pulling layer 10 to ensure that the pulling layer 10 is stably stressed.

[0044] Another embodiment of the present invention 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 specifically includes the following steps:

[0045] S1. Set up a bottom temporary support structure 2 and a core tube 1, wherein 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, which can be a steel structure or a reinforced concrete structure.

[0046] S2. On the bottom temporary support structure 2, construct the steel structure of each floor from bottom to top until the mth floor, n>m>0, n is the total number of suspended floors, and m is a constant.

[0047] S3, installing the connecting plate 31 on the structural steel column of the m-th layer steel structure using the fastener 32;

[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 roof steel truss 4 and the steel structure above the m-th floor are continued to be constructed. 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, as the structural steel column of the non-pulling layer, can support the roof steel truss 4. The pressure of the non-pulling layer 20 is transmitted 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 makes 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, thereby 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] Specifically, both ends of the connection plate 31 in the node support structure 3 are detachably connected to the pulling layer 10 and the supporting steel column 21 through high-strength bolts. It should be noted that the high-strength bolts are finally tightened at this stage.

[0052] S5, dismantling the node support structure 3, and completing 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 truss 4, and connect the roof lifting structure 5 and the lifting layer 10 to lift the lifting layer 10 in situ. Specifically, the roof lifting structure 5 is connected to the nmth layer of the lifting layer 10 to lift all floors of the lifting layer 10, thereby completing the conversion of the lifting layer 10 from a compressive state to a tensile state.

[0054] S7, fix the structural steel columns and supporting 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 supporting 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 the construction cost. 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, 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 suspended steel structure construction method, 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 construction supports for the roof steel trusses 4, replacing the temporary support steel columns in the prior art. 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] 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 suspended steel structure construction device, used for constructing a suspended steel structure, wherein the suspended steel structure comprises a pulling layer (10) and a non-pulling layer (20), characterized in that: 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), wherein the node support structure (3) comprises a connecting plate (31), one end of the connecting plate (31) is detachably connected to the non-pulling layer (20), and the other end of the connecting plate (31) is detachably connected to the pulling layer (10); Core tube (1); A bottom temporary support structure (2), arranged around the core tube (1) and capable of supporting 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, characterized in that: 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, characterized in that: The roof lifting structure (5) comprises 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 can be connected to the lifting layer (10).

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

6. The construction method of the suspended steel structure is characterized in that: The construction method is carried out using the construction device for the suspended steel structure as described in any one of claims 2 to 5, and the construction method specifically comprises the following steps: 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), the steel structures of each floor are constructed from bottom to top until the mth floor, where n is the total number of suspended floors, and m is a constant, n>m>0; Installing a connection plate (31) on the structural steel column of the m-th layer steel structure using fasteners (32); A support steel column (21) is detachably connected to the top of the connection plate (31), and there is a gap between the support 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 connection plate (31) is used as a boundary. The steel structure below the connection plate (31) is the pulling layer (10), and the steel structure above the connection plate (31) is the non-pulling layer (20). The support steel column (21) serves as the structural steel column of the non-pulling layer (20) and can support the roof steel truss (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, characterized in that: After the pulling is completed, the connecting plate (31) and the fastener (32) are used to fix the structural steel column of the pulling layer (10) and the supporting steel column (21). 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 the suspended steel structure according to claim 6, characterized in that: When the roof lifting structure (5) is connected to the pulling layer (10), the m-th layer of steel structure is connected.

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

10. The construction method of the suspended steel structure according to claim 6, characterized in that: 3≥nm>0.

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