Construction method of cantilever steel frame structure

Abstract

The invention relates to a construction method of a cantilever steel frame structure. The construction method comprises the following steps that segmented components of the steel frame structure are transported to a construction area; the basement roof height difference is measured, and a jig frame is arranged on the ground according to the basement roof height difference; on the jig frame, the segmented components are spliced to form a steel frame structure according to the hierarchical sequence; lifting equipment is installed on the building main body structure; lifting the whole steel frame structure to a design position by using lifting equipment; and an inlaying section is erected between the steel frame structure and the building main body structure. According to the construction method of the cantilever steel frame structure, the segmented components are spliced into the steel frame structure on the construction site, and then the steel frame structure is integrally lifted to the design position to be connected with the building main body structure, so that the working efficiency is improved, the construction cost is low, the construction speed is high, the influence can be reduced, and the quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a construction method of a cantilever steel frame structure. BACKGROUND

[0002] Because the strength of steel is much higher than that of concrete, under the same cantilever span, the self-weight of the steel structure can be reduced by more than 50%, reducing the burden of the main structure, suitable for large-span cantilever, reducing the bending moment and deformation caused by self-weight, and steel can still absorb energy through plastic deformation after yielding, avoiding brittle failure. Under the action of earthquake, the cantilever member of the steel structure can consume seismic energy through slight deformation, reducing the risk of fracture.

[0003] In high-rise buildings, more and more super-long cantilever steel frame structure systems are designed by taking advantage of the characteristics of steel structure, but the cantilever steel frame structure cannot be set with temporary support from bottom to top by using traditional construction method, which is difficult to construct and affects the overall construction progress of the building. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provide a construction method of a cantilever steel frame structure, which solves the problem of complex large-span cantilever structure and the problem that the cantilever steel frame structure cannot be constructed from bottom to top by using traditional construction method.

[0005] The technical solution to achieve the above-mentioned purpose is: a construction method of a cantilever steel frame structure, comprising the following steps: transporting segmented components of a steel frame structure to a construction area; measuring the height difference of the basement roof and setting an anchor frame on the ground according to the height difference of the basement roof; on the anchor frame, the segmented components are spliced in order of layers to form the steel frame structure; installing lifting equipment on the main structure of the building; using the lifting equipment to lift the steel frame structure as a whole to the designed position; and setting a patching section between the steel frame structure and the main structure of the building.

[0006] In the construction method of the cantilever steel frame structure, the segmented components are spliced into a steel frame structure at the construction site, and then the steel frame structure is lifted as a whole to the designed position and connected with the main structure of the building, which improves the work efficiency, reduces the construction cost, speeds up the construction, reduces the impact, and ensures the quality.

[0007] The further improvement of the construction method of the cantilever steel frame structure is that the transporting of the segmented components of the steel frame structure to the construction area comprises: marking a number on each segmented component.

[0008] The further improvement of the construction method of the cantilever steel frame structure is that the splicing of the segmented components on the jig to form the steel frame structure according to the hierarchical sequence comprises: arranging a first reinforcing structure on the steel frame structure.

[0009] The further improvement of the construction method of the cantilever steel frame structure is that the installation of the lifting device on the main building structure comprises: arranging an upper lifting point on the main structure; and arranging a first beam body at the first lifting point.

[0010] The further improvement of the construction method of the cantilever steel frame structure is that the installation of the lifting device on the main building structure further comprises: correspondingly arranging a second reinforcing structure below the first beam body.

[0011] The further improvement of the construction method of the cantilever steel frame structure is that the lifting of the steel frame structure as a whole to the design position by the lifting device comprises: arranging a lower lifting point on the steel frame structure; arranging a second beam body at the second lifting point and arranging a third reinforcing structure outside the second beam body.

[0012] The further improvement of the construction method of the cantilever steel frame structure is that the lifting of the steel frame structure as a whole to the design position by the lifting device comprises: correspondingly arranging the upper lifting point and the lower lifting point in an up-down manner.

[0013] The further improvement of the construction method of the cantilever steel frame structure is that the arrangement of the embedded segment between the steel frame structure and the main building structure comprises: arranging a steel beam connection between the connecting end of the steel frame structure and the main building structure.

[0014] The further improvement of the construction method of the cantilever steel frame structure is that the arrangement of the embedded segment between the steel frame structure and the main building structure further comprises: arranging a secondary beam connection between the side of the steel frame structure and the main building structure.

[0015] The further improvement of the construction method of the cantilever steel frame structure further comprises: respectively hoisting a round pipe column connection on the upper and lower sides of the steel frame structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The flowchart of the construction method of the cantilever steel frame structure is shown.

[0017] Figure 2 The lateral sectional view of the cantilever steel frame structure and the main building structure is shown.

[0018] Figure 3The flow chart is for step S110 of the present application.

[0019] Figure 4 The flow chart is for step S130 of the present application.

[0020] Figure 5 The flow chart is for step S140 of the present application.

[0021] Figure 6 The flow chart is for step S140 of the present application.

[0022] Figure 7 The flow chart is for step S150 of the present application.

[0023] Figure 8 The flow chart is for step S150 of the present application.

[0024] Figure 9 The flow chart is for step S160 of the present application.

[0025] Figure 10 The lateral section view of the cantilever steel frame structure and the main structure of the present application is shown.

[0026] Figure 11 The flow chart is for step S160 of the present application.

[0027] Figure 12 The flow chart is for step S160 of the present application.

[0028] Figure 13 The connection diagram of the round pipe column of the present application is shown.

[0029] In the figure: 1, steel frame structure; 11, first reinforcing structure; 2, main structure; 3, upper lifting point; 4, first beam body; 5, second reinforcing structure; 6, lower lifting point; 7, second beam body; 8, third reinforcing structure; 9, embedded section; 91, steel beam; 92, secondary beam; 10, round pipe column; 11, lifting oil cylinder; 12, support. DETAILED DESCRIPTION

[0030] The present application will be further described in combination with the drawings and specific embodiments.

[0031] Referring to Figure 1 and Figure 2 , Figure 1 The flow chart of the construction method of the cantilever steel frame structure of the present application is shown, Figure 2 The lateral section view of the cantilever steel frame structure and the main structure of the present application is shown. The present application provides a construction method of a cantilever steel frame structure, which comprises the following steps: Step S110 is performed to transport the segmented components of the steel frame structure 1 to the construction area.

[0032] The segmented components are transported to the construction site after being manufactured in the processing factory, and then step S120 is performed.

[0033] Step S120 is performed to measure the height difference of the basement roof and set up the jig frame on the ground according to the height difference of the basement roof.

[0034] The height difference of the basement roof is accurately measured by using a total station and other measuring equipment, and the form and layout of the assembly jig frame are designed in combination with the weight, size and shape characteristics of the segmented components, and then step S130 is performed.

[0035] Step S130 is performed to assemble the segmented components to form the steel frame structure 1 on the jig frame in a hierarchical order.

[0036] The segmented components are assembled and welded in a hierarchical order from bottom to top by using a truck crane with a suitable tonnage, calculating and determining the model and station of the truck crane according to the weight of the steel frame components, the lifting height and the on-site operation conditions, and then step S140 is performed.

[0037] Step S140 is performed to install the lifting equipment on the main building structure 2.

[0038] The lifting equipment includes a jack, an oil pump, a control system and the like. Before the lifting equipment is jointly debugged, each device is individually debugged to check whether the operation state and parameter setting of the device are normal, and then step S150 is performed.

[0039] Step S150 is performed to use the lifting equipment to lift the steel frame structure 1 as a whole to the designed position.

[0040] After the steel frame is lifted to the position, each connecting part is checked and adjusted to ensure the accuracy of the structure position, and then step S160 is performed.

[0041] Step S160 is performed to set up the embedded segment 9 between the steel frame structure 1 and the main building structure 2.

[0042] The embedded segment 9 realizes reliable connection between the steel frame structure 1 and the main building structure 2.

[0043] Referring to Figure 3 , a flowchart of step S110 of the present application is shown. The present application provides a construction method of a cantilever steel frame structure, and step S110 includes: Step S111 is performed to mark a number on each segmented component.

[0044] In the processing plant, steel structure components need to be precisely cut and processed according to the design drawings. During the processing, the beveling and welding quality of the components are strictly controlled. After completion, the components are clearly marked with numbers, installation positions and orientation marks to facilitate subsequent assembly.

[0045] See Figure 4 The diagram shows a flow chart of step S130 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S130 includes: Step S131: Install the first reinforcing structure 11 on the steel frame structure 1.

[0046] The first reinforcing structure 11 can be a steel section, and the first reinforcing structure 11 is set at the weak point of the steel frame structure 1 for reinforcement.

[0047] See Figure 5 The diagram shows a flow chart for step S140 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S140 includes: Execution step S141: Set up lifting point 3 on the main structure 2.

[0048] In this process, based on the structural stress calculation results, the upper lifting point 3 is set appropriately, and then step S142 is executed.

[0049] Execution step S142: Set the first beam 4 at the first lifting point.

[0050] In this embodiment, two upper lifting points 3 are provided on the main structure 2, and a first beam 4 is provided at each of the two upper lifting points 3. The first beam 4 spans between the structural beams of the main structure 2, and the two first beams 4 are arranged opposite to each other. Lifting cylinders 11 are installed on the first beams 4 respectively.

[0051] See Figure 6 This illustrates another flowchart for step S140 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S140 further includes: Execute step S143: Set a second reinforcing structure 5 below the first beam 4.

[0052] The second reinforcing structure 5 can enhance the structural stress resistance. The second reinforcing structure 5 includes diagonal braces and stiffening plates.

[0053] See Figure 7 The diagram shows a flow chart for step S150 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S150 includes: Step S151: Set up a lower lifting point 6 on the steel frame structure 1.

[0054] Among them, the lower lifting point 6 is set on the same floor as the steel frame structure 1, and then step S152 is executed.

[0055] Execution step S152: Set a second beam 7 at the second lifting point, and set a third reinforcing structure 8 on the outside of the second beam 7.

[0056] The second beam 7 is horizontally connected to the steel frame structure 1, and the third reinforcing structure 8 is diagonally reinforced to the steel frame structure 1 to ensure stability during the lifting process.

[0057] See Figure 8 This shows another flowchart illustrating step S150 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S150 includes: Execute step S153: Set the upper lifting point 3 and the lower lifting point 6 to correspond vertically.

[0058] The lower lifting point 6 is set in accordance with the upper lifting point 3, which can ensure that the structure is subjected to uniform force during the lifting process.

[0059] See Figure 9 and Figure 10 , Figure 9 The diagram shown is a flowchart of step S160 of the present invention. Figure 10 This invention displays a transverse sectional view of the cantilevered steel frame structure and the main structure. The invention provides a construction method for a cantilevered steel frame structure, step S160 of which includes: Step S161: Install steel beams 91 to connect the connection ends of the steel frame structure 1 and the main building structure 2.

[0060] In this structure, multiple connection ends are provided on each floor of the steel frame structure 1 near the connection side of the main structure 2, and multiple steel beams 91 are horizontally connected between the ends of the steel frame structure 1 and the main structure 2, with multiple steel beams 91 spaced apart on each floor.

[0061] See Figure 11 This illustrates another flowchart of step S160 of the present invention. The present invention provides a construction method for a cantilevered steel frame structure, wherein step S160 further includes: Step S162: Install a secondary beam 92 to connect the side of the steel frame structure 1 with the main building structure 2.

[0062] Among them, the secondary beam 92 further reinforces the connection between the steel frame structure 1 and the main building structure 2.

[0063] See Figure 12 and Figure 13 , Figure 12This illustrates another flowchart of a construction method for a cantilevered steel frame structure according to the present invention. Figure 13 A schematic diagram of the connection of the circular tube column of the present invention is shown. The present invention provides a construction method for a cantilevered steel frame structure, further comprising: Step S170: Hoist the circular tube columns 10 on the upper and lower sides of the steel frame structure 1 respectively.

[0064] The circular tube columns 10 on the upper and lower sides of the steel frame structure 1 are arranged in a vertically corresponding manner. The circular tube columns 10 are hoisted using a hoist, and their position and verticality can be slowly adjusted by pulling the hoist. During installation, the circular tube columns 10 are precisely aligned with the installed steel frame components and can be fixed by welding or high-strength bolts.

[0065] In this embodiment, the circular tube column 10 is connected to the steel frame by a support 12. The support 12 is hoisted to the design position using a hoist. Through measurement and adjustment, the planar position, elevation and level of the support 12 are ensured to meet the design requirements. The support 12 is reliably connected to the steel frame by welding.

[0066] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method for a cantilevered steel frame structure, characterized in that, Includes the following steps: Transport the segmented components of the steel frame structure to the construction area; Measure the height difference of the basement roof slab, and set up a formwork on the ground according to the height difference of the basement roof slab; On the frame, the segmented components are assembled in a hierarchical order to form the steel frame structure; Install lifting equipment on the main structure of the building; The steel frame structure is lifted as a whole to the designed location using the lifting equipment. An interlocking section is erected between the steel frame structure and the main building structure.

2. The construction method for a cantilevered steel frame structure according to claim 1, characterized in that, The transportation of the segmented components of the steel frame structure to the construction area includes: Each of the segmented components is labeled with a number.

3. The construction method for a cantilevered steel frame structure according to claim 1, characterized in that, The process of assembling the segmented components on the jig in a hierarchical order to form the steel frame structure includes: A first reinforcing structure is installed on the steel frame structure.

4. The construction method for a cantilevered steel frame structure according to claim 1, characterized in that, The installation of lifting equipment on the main building structure includes: Lifting points are provided on the main structure; A first beam is installed at the first lifting point.

5. The construction method for a cantilevered steel frame structure according to claim 4, characterized in that, The installation of lifting equipment on the main building structure also includes: A second reinforcement structure is provided below the first beam.

6. The construction method for a cantilevered steel frame structure according to claim 4, characterized in that, The process of using the lifting equipment to lift the steel frame structure as a whole to the designed location includes: A lower lifting point is provided on the steel frame structure; A second beam is installed at the second lifting point, and a third reinforcement structure is installed on the outside of the second beam.

7. The construction method for a cantilevered steel frame structure according to claim 4, characterized in that, The process of using the lifting equipment to lift the steel frame structure as a whole to the designed location includes: The upper lifting point and the lower lifting point are set to correspond vertically.

8. The construction method for a cantilevered steel frame structure according to claim 1, characterized in that, The method of erecting a patch section between the steel frame structure and the main building structure includes: A steel beam is installed between the connection end of the steel frame structure and the main building structure.

9. The construction method for a cantilevered steel frame structure according to claim 1, characterized in that, The method of erecting a patch section between the steel frame structure and the main building structure also includes: A secondary beam is installed between the side of the steel frame structure and the main building structure for connection.

10. A construction method for a cantilevered steel frame structure according to claim 1, characterized in that, Also includes: Circular tubular columns are hoisted and connected to the upper and lower sides of the steel frame structure, respectively.

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