A steel structure vertical rotation method construction process in a confined space

Abstract

The application discloses a kind of steel structure vertical rotation method construction technology under confined space, it includes the following steps: S1, simulation construction;S2, installation construction, including the following steps: Ss1, hoist the steel structure main body is close to installation position;Ss2, adjust hand-operated hoist to adjust steel column inclination angle, and move to installation position directly above, ensure that the steel structure main body installation angle is consistent with model simulation;Ss3, steel structure main body is vertically descended under the condition that inclination angle does not change, and makes pre-buried bolt pass through the lower layer steel plate of steel structure connecting portion;Ss4, after steel structure main body is descended to safe height, steel structure main body is adjusted to vertical state, makes pre-buried bolt pass through the upper layer steel plate of steel structure connecting portion, completes installation.The beneficial effects of the application are: simple mechanical equipment, low cost;Construction uses manual adjustment, wide application range;It also reduces the space requirement required for steel structure installation, allows cross construction operation in the same construction range, greatly reduces the construction period cost.

Description

Technical Field

[0001] This invention relates to a construction process for vertical rotation of steel structures in confined spaces, belonging to the field of engineering construction technology. Background Technology

[0002] In the construction industry, it is common for steel structures and other disciplines to be constructed together. The site conditions are complex and changeable, and there are often other structures above and below the steel structure components. For example, there may be a concrete beam structure above the steel structure components. In order to ensure the safety and stability of the project, the installation of steel structure components must avoid the existing structure and not affect other constructed structures. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a construction process for vertical rotation of steel structures in confined spaces. This construction method is applicable to the installation process of steel structures with obstacles at the top, ensuring the normal installation and placement of the steel structure and solving the problem of environmental constraints in the vertical direction of the steel structure.

[0004] This invention is achieved through the following scheme: a construction process for vertical rotation of steel structures in confined spaces, comprising a steel structure main body, a steel structure connecting part at the lower part of the steel structure main body, pre-embedded bolts on the lower side of the steel structure main body, the pre-embedded bolts being inserted into a concrete base, a concrete beam above the concrete base, and the steel structure connecting part comprising an upper steel plate and a lower steel plate. The construction method includes the following steps: S1. Simulated construction: Using modeling software to simulate feasible directions and angles for steel structure installation; S2. Installation and construction, including the following steps: Ss1. Hoist the main steel structure close to the installation position; Ss2. Connect manual hoists to multiple lifting lugs on the upper part of the steel structure main body. Adjust the tilt angle of the steel column by adjusting the manual hoist and move it directly above the installation position to ensure that the installation angle of the steel structure main body is consistent with the model simulation. Ss3. By operating the crane and the manual hoist simultaneously, ensure that the main body of the steel structure is lowered vertically while the tilt angle remains unchanged, and make the pre-embedded bolts pass through the lower steel plate of the steel structure connection part. Ss4. After lowering the main steel structure to a safe height, adjust the main steel structure to a vertical position by adjusting the manual hoist, so that the pre-embedded bolts pass through the upper steel plate of the steel structure connection part to complete the installation.

[0005] The specific process in step S1 is as follows: First, the positional relationship between the steel column and the concrete beam after installation is simulated. Then, the steel column is lifted to simulate the positional relationship between the steel column and the concrete beam during installation, and the required tilt angle during installation is determined.

[0006] When adjusting the angle in step Ss2, at least two manual hoists should be installed on the steel component, one at the top and one at the bottom. By tightening the upper manual hoist, the steel component can be rotated clockwise; by tightening the lower manual hoist, the steel component can be rotated in the opposite direction.

[0007] The lower two-thirds of the pre-embedded bolt is inserted into the concrete base.

[0008] The lower steel plate is located below the upper steel plate, and the upper and lower steel plates are fixedly connected by steel structure components.

[0009] The beneficial effects of this invention are as follows: 1. The construction process and equipment for vertical rotation of steel structures in confined spaces described in this invention are simple, common, and incur low construction costs; 2. The present invention provides a construction process for vertical rotation of steel structures in confined spaces, which employs manual adjustment and has a wide range of applications. 3. The present invention provides a construction process for vertical rotation of steel structures in confined spaces, which reduces the space requirements for steel structure installation, allows for cross-construction operations within the same construction area, and greatly reduces construction period and costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of step Ss1 of the construction process of a steel structure vertical rotation method under confined space according to the present invention.

[0011] Figure 2 This is a schematic diagram of step Ss2 of the construction process of a steel structure vertical rotation method under confined space according to the present invention.

[0012] Figure 3 This is a schematic diagram of step Ss4 of the construction process of a steel structure vertical rotation method under confined space according to the present invention.

[0013] Figure 4 This is a schematic diagram of hole offset on the lower steel plate in the vertical rotation method construction process of steel structure in a confined space according to the present invention.

[0014] Figure 5 This is a schematic diagram showing the pre-embedded bolts passing through the steel structure connection part in the vertical rotation construction process of steel structure under confined space according to the present invention.

[0015] Figure 6 This invention relates to a construction process for vertical rotation of steel structures in confined spaces. Figure 5 A schematic diagram of the A-size sample.

[0016] In the diagram: 100 is the main steel structure, 101 is the steel structure connection part, 102 is the upper steel plate, 103 is the lower steel plate, 200 is the embedded bolt, 300 is the concrete base, and 400 is the concrete beam. Detailed Implementation

[0017] The following is combined with Figure 1-6 The present invention will be further described, but the scope of protection of the present invention is not limited to the contents described herein.

[0018] Example: The lower part of the steel structure main body 100 is connected to the steel structure connecting part 101. There are pre-embedded bolts 200 on the lower side of the steel structure main body 100. The pre-embedded bolts 200 are inserted into the concrete base 300. The steel structure connecting part 101 includes an upper steel plate 102 and a lower steel plate 103. There is a concrete beam 400 above the concrete base 300. Now it is necessary to place the steel structure main body 100 on the base of the concrete base 300. Due to the presence of the concrete beam 400, it is not possible to install the steel structure main body 100 vertically on the base of the concrete base 300 using conventional construction methods.

[0019] A construction technique for vertical rotation of steel structures in confined spaces is adopted, and the construction method includes the following steps: S1. Simulated construction: Using modeling software to simulate feasible directions and angles for steel structure installation; First, the positional relationship between the steel column and the concrete beam after installation is simulated. Then, the steel column is lifted to simulate the positional relationship between the steel column and the concrete beam during installation, and the required tilt angle during installation is determined.

[0020] Based on the 85mm specification of the pre-embedded bolt 200, and 92mm holes on the upper steel plate 102 and lower steel plate 103, a simulation was performed. The maximum hole enlargement value on the side closest to the concrete slab is 12mm. Considering the allowable offset of the anchor bolt center is 5mm, the hole enlargement value is assumed to be 17mm. Refer to the offset diagram. Figure 4 .

[0021] S2. Installation and construction, including the following steps: Ss1, reference Figure 1 The main steel structure was hoisted 100 meters close to the installation position; Ss2, reference Figure 2 Manual hoists are connected to multiple lifting lugs on the upper part of the steel structure 100. The tilt angle of the steel column is adjusted by adjusting the manual hoists and moved to the top of the installation position to ensure that the installation angle of the steel structure 100 is consistent with the model simulation. At least two manual hoists should be installed on the steel structure, one at the top and one at the bottom. By tightening the upper manual hoist, the steel structure can be rotated clockwise; by tightening the lower manual hoist, the steel structure can be rotated in the opposite direction.

[0022] Ss3. By simultaneously operating the crane and the manual hoist, ensure that the main steel structure 100 descends vertically while maintaining the same tilt angle, and that the pre-embedded bolts 200 pass through the lower steel plate of the steel structure connection 101, with the passing state as referenced. Figure 5 and Figure 6 ; Ss4, reference Figure 4 After lowering the main steel structure 100 to a safe height, the main steel structure 100 is adjusted to a vertical position by adjusting the manual hoist, so that the pre-embedded bolts 200 pass through the upper steel plate of the steel structure connection part 101 to complete the installation. After the main steel structure 100 is installed, the enlarged hole part is welded and repaired, and a 200*200*30 reinforcing plate is added to the upper part of the lower steel plate 103 for reinforcement welding.

[0023] The lower two-thirds of the pre-embedded bolt 200 is inserted into the concrete base 300. The lower steel plate 103 is below the upper steel plate 102. The upper steel plate 102 and the lower steel plate 103 are fixedly connected by steel structure components.

[0024] Although the technical solutions of the present invention have been described and enumerated in detail, it should be understood that modifications to the above embodiments or the adoption of equivalent alternatives are obvious to those skilled in the art. Such modifications or improvements made without departing from the spirit of the present invention are all within the scope of protection claimed by the present invention.

Claims

1. A construction process for a steel structure with vertical rotation in a confined space, comprising a steel structure main body (100), wherein the lower part of the steel structure main body (100) is connected to a steel structure connection part (101), the lower side of the steel structure main body (100) has pre-embedded bolts (200), the pre-embedded bolts (200) are inserted into a concrete base (300), and a concrete beam (400) is provided above the concrete base (300), characterized in that, The steel structure connection (101) includes an upper steel plate (102) and a lower steel plate (103), and the construction method includes the following steps: S1. Simulate construction by using modeling software to simulate feasible directions and angles for steel structure installation; S2. Installation and construction, including the following steps: Ss1, hoist the main steel structure (100) close to the installation position; Ss2. Connect a manual hoist to multiple lifting lugs on the upper part of the main steel structure (100), adjust the tilt angle of the steel column by adjusting the manual hoist, and move it directly above the installation position to ensure that the installation angle of the main steel structure (100) is consistent with the model simulation. Ss3. By operating the crane and the manual hoist simultaneously, ensure that the main body of the steel structure (100) descends vertically while the tilt angle remains unchanged, and make the pre-embedded bolts (200) pass through the lower steel plate of the steel structure connection part (101). Ss4. After lowering the main steel structure (100) to a safe height, adjust the main steel structure (100) to a vertical position by adjusting the manual hoist, so that the pre-embedded bolts (200) pass through the upper steel plate of the steel structure connection part (101) to complete the installation.

2. The construction process of vertical rotation of steel structure in confined space according to claim 1, characterized in that: The specific process in step S1 is as follows: First, the positional relationship between the steel column and the concrete beam after installation is simulated. Then, the steel column is lifted to simulate the positional relationship between the steel column and the concrete beam during installation, and the required tilt angle during installation is determined.

3. The construction process of vertical rotation of steel structure in confined space according to claim 1, characterized in that: When adjusting the angle in step Ss2, at least two manual hoists should be installed on the steel component, one at the top and one at the bottom. By tightening the upper manual hoist, the steel component can be rotated clockwise; by tightening the lower manual hoist, the steel component can be rotated in the opposite direction.

4. The construction process of a steel structure vertical rotation method in a confined space according to claim 1, characterized in that: The lower two-thirds of the pre-embedded bolt (200) is inserted into the concrete base (300).

5. The construction process of a steel structure vertical rotation method in a confined space according to claim 1, characterized in that: The lower steel plate (103) is located below the upper steel plate (102), and the upper steel plate (102) and the lower steel plate (103) are fixedly connected by steel structure components.

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