Construction method for rotating installation of shuttle-shaped inclined column under large cantilever structure

Abstract

The application discloses a construction method for rotating installation of a shuttle-shaped inclined column under a large cantilever structure, and comprises the following steps: sequentially completing main structure and hinged support installation, lower end plate installation and angle adjustment, upper end of the inclined column fixing, lifting point displacement, inclined column rotating butt joint and positioning welding fixing, and the like; through a "rotating installation" mode, the inclined column is installed by using existing structures and conventional hoisting tools; the application does not need complex special equipment, is convenient to purchase and process, has low investment cost, has simple operation process and high operability, can effectively reduce mechanical and installation measure investment under a limited space, significantly improves hoisting safety by unifying lifting object installation dimensions through a pin shaft pre-installation mode, can accelerate construction progress, and is suitable for on-site installation of shuttle-shaped inclined columns in large and complex steel structure engineering.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and more specifically, to a construction method for rotating and installing spindle-shaped inclined columns under a large cantilever structure. Background Technology

[0002] In recent years, my country's steel structure building construction level has continued to improve, with various complex structural shapes, complex nodes, and large-scale complex structures being widely used in construction projects. Consequently, unconventional requirements have been placed on construction methods. In particular, the hoisting and installation of ultra-large and irregularly shaped components not only requires meeting the high precision requirements of steel structure installation but also balancing the rationality of on-site construction organization and the safety of the construction process.

[0003] In large-scale steel structure projects, the installation of spindle-shaped inclined columns under large cantilever structures often faces prominent problems: after the superstructure has been installed, the hoisting space is severely limited, and traditional hoisting methods cannot utilize existing on-site resources to achieve precise positioning of the inclined columns. Using specialized large equipment or additional installation measures leads to a significant increase in construction costs, a longer construction period, and substantial safety risks. Therefore, there is an urgent need to design a large-scale inclined column hoisting construction method that can fully utilize existing on-site lifting equipment and structures, is simple to operate, low-cost, and safe and reliable, in order to solve the aforementioned problems existing in current technologies. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a construction method for rotating and installing spindle-shaped inclined columns under a large cantilever structure. This method solves the problem of difficulty in installing the spindle-shaped inclined columns in place when the hoisting space is limited after the upper structure has been installed, thereby achieving the effects of accelerating the construction progress, reducing construction costs, and ensuring construction safety.

[0005] The present invention adopts the following technical solution:

[0006] This invention discloses a construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure, comprising the following steps:

[0007] S1. Install steel columns and auxiliary steel brackets, and large cantilever trusses.

[0008] First, install the steel columns and auxiliary steel brackets of the main steel structure, then install the large cantilever truss, and simultaneously install the lower hinged support and the upper hinged support.

[0009] S2. Install the lower end plate and adjust it to a suitable angle.

[0010] The lower end plate is connected to the lower hinge support by a pin, and a chain hoist is set to pull the lower end plate so that it can rotate to a suitable angle under control.

[0011] S3. Lift and secure the upper end of the inclined column.

[0012] Connect the inclined column with the wire rope and shackle on the hook of the lifting equipment, adjust the lifting angle and slowly lift the inclined column so that the upper end plate is inserted into the upper hinge support. Swing the hook appropriately to align with the mounting hole, insert the pin to lock the upper end plate and the upper hinge support in place.

[0013] S4. The inclined column hangs naturally and the hook is loosened.

[0014] Swing the inclined column freely until it hangs naturally, then release the hook of the lifting equipment and disconnect the wire rope from the shackle;

[0015] S5. Shift the lifting point and raise the lower end of the inclined column.

[0016] Move the hook of the lifting equipment to a predetermined distance above the lower end of the inclined column and set the lifting point. Lock the wire rope and shackle. Slowly lift the lower end around the upper hinge support. Rotate the lower end to below the lower hinge support and pause. Measure the relative distance between the lower end and the lower hinge support.

[0017] S6. Connect the lower end plate to the lower port of the inclined column.

[0018] After confirming that the relative distance meets the requirements after retesting, continue to rotate the inclined column closer to the lower end plate. At the same time, use the chain hoist to finely adjust the angle of the lower end plate so that the lower end plate is flush with the lower end of the inclined column, and connect the lower end plate to the lower end of the inclined column.

[0019] S7. Installation complete.

[0020] After the lower end plate is connected to the lower end of the inclined column, remove the hook and wire rope of the lifting equipment to complete the rotation method installation of the inclined column.

[0021] Beneficial effects

[0022] Low cost: It only uses conventional construction tools (wire rope, shackles, pins, chain hoists, etc.) and existing lifting equipment on the construction site. The lower end plate can be made by reusing old lifting lugs. Procurement and processing are convenient, and the investment in equipment and materials is small, which significantly reduces construction costs.

[0023] Easy to operate: The construction process is clear, requiring no complicated technical processes or professional training. It is highly operable and easy for on-site construction personnel to quickly master and implement.

[0024] Strong spatial adaptability: Adopting the "rotation installation" mode, it makes the maximum use of the original structural device as a rotation support, without occupying a large additional hoisting space. It can effectively solve the problem of limited hoisting space after the upper structure has been installed, and reduce the investment in mechanical and installation measures.

[0025] High safety: The upper end of the inclined column is fixed by pre-installation with pins, which simplifies the installation dimension of the suspended object, avoids large swaying during the hoisting process of the inclined column, reduces the risk of high-altitude operation, and ensures construction safety;

[0026] High construction efficiency: It simplifies the hoisting process in complex spaces, reduces the time for preparation and equipment debugging, effectively speeds up the construction progress, and ensures that the project is completed on schedule. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the hinged support, steel column, and auxiliary steel bracket connected according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of a large cantilever truss connected to the upper hinged support according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the chain hoist after installation according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of step S3 after construction in one embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of step S4 in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of step S5 in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of step S6 in an embodiment of the present invention;

[0034] Figure 8 This is a partial schematic diagram of an embodiment of the present invention after installation;

[0035] Figure 9 This is a partial schematic diagram after installation according to an embodiment of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] This invention discloses a construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure, comprising the following steps:

[0038] S1. Install steel column 1 and its associated steel bracket 3, and large cantilever truss 2.

[0039] First, install the main steel column 1 and the auxiliary steel bracket 3, then install the large cantilever truss 2. The auxiliary steel bracket 3 is installed horizontally on one side of the steel column 1. At the same time, the lower hinged support 4 and the upper hinged support 9 are installed simultaneously. The lower hinged support 4 is installed at the end of the auxiliary steel bracket 3, and the upper hinged support 9 is installed at the lower end of the large cantilever truss 2.

[0040] S2. Install the lower end plate 6 and adjust it to a suitable angle.

[0041] The lower end plate 6 is connected to the lower hinged support 4 by a pin 5, and a chain hoist 11 is set to pull the lower end plate 6. One end of the chain hoist 11 is installed on the steel column 1, and the other end of the chain hoist 11 is connected to the lower end plate 6. This allows the lower end plate 6 to rotate at a suitable angle under control, so that when the inclined column 7 rotates from bottom to top, it does not obstruct the passage of its lower port 12.

[0042] S3, lift and fix the upper end of the inclined column 7.

[0043] The inclined column 7 is connected to the wire rope and shackle on the hook 13 of the lifting equipment. After adjusting the lifting angle, the inclined column 7 is slowly lifted so that the upper end plate 8 of the inclined column 7 is inserted into the upper hinge support 9. The hook 13 is swung appropriately to align with the mounting hole, and the pin 10 is inserted to lock the upper end plate 8 and the upper hinge support 9 together.

[0044] S4, the inclined column 7 hangs down naturally and the hook is loosened.

[0045] Swing the inclined column 7 freely to a natural hanging state, then loosen the hook 13 of the lifting equipment and disconnect the wire rope from the shackle;

[0046] S5. Shift the lifting point and raise the lower end of the inclined column.

[0047] Move the hook 13 of the lifting equipment to a predetermined distance above the lower port 12 of the inclined column 7 to set the lifting point, lock the wire rope and shackle, slowly lift the lower port 12 around the upper hinge support 9, rotate the lower port 12 to below the lower hinge support 4 and then stop, measure the relative distance between the lower port 12 and the lower hinge support 4.

[0048] S6. Connect the lower end plate to the lower port of the inclined column.

[0049] After confirming that the relative distance meets the requirements after retesting, continue to rotate the inclined column 7 closer to the lower end plate 6. At the same time, the angle of the lower end plate 6 is adjusted synchronously by the chain hoist 11. The lower end plate 6 and the lower port 12 of the inclined column 7 are aligned and the weld gap is uniform. The lower end plate 6 is then fixed by positioning weld to the lower port 12 of the inclined column 7.

[0050] The core function of the upper hinged support 9 is:

[0051] Rotation fulcrum positioning and load bearing: As the "upper fixed rotation axis" for the installation of inclined column 7, it is the core benchmark of the entire rotation installation process. During construction, the upper end plate 8 of the inclined column is first inserted into the upper hinge support 9 and fixed with a pin, so that the inclined column 7 can rotate stably around the pin axis of the upper hinge support 9, which solves the problem that the inclined column cannot be moved and hoisted as a whole in a confined space.

[0052] Temporary load bearing at the upper end of the inclined column: During the natural descent, displacement of the lifting point and rotation and lifting of the inclined column, the upper hinged support 9 must bear the entire self-weight of the inclined column (including temporary construction loads) to ensure the stability of the inclined column suspension state and avoid the risk of swaying or falling during rotation.

[0053] Installation accuracy benchmark guarantee: The upper hinged support is installed synchronously with the main structure (large cantilever truss 2). Its axial position, horizontality and verticality are precisely controlled to provide a fixed installation benchmark for the upper end of the inclined column, which directly determines the verticality and spatial position accuracy of the overall installation of the inclined column.

[0054] Limiting and constraining functions: The upper end plate of the inclined column is rigidly connected to the pin shaft, which restricts the horizontal displacement and rotational freedom of the upper end of the inclined column, and only retains the rotational freedom around the pin shaft, so as to realize "single-dimensional lifting installation" and improve the lifting safety.

[0055] The function of the lower hinged support 4 is:

[0056] The lower end plate installation and angle adjustment base is hinged to the lower end plate via a pin, providing a rotatable mounting platform for the lower end plate. During construction, the lower end plate can be rotated around the pin of the lower hinge support using a chain hoist, flexibly adjusting the angle of the lower end plate to ensure unobstructed rotation of the lower end and accommodate angle deviations when connecting inclined columns.

[0057] Final fixation and load transfer at the lower end of the inclined column: After the inclined column is rotated into place, the lower end plate is welded to the lower port and fixed. The lower hinged support transfers the vertical load (self-weight and load from the upper part) and horizontal load of the inclined column to the main structure (steel column 1 + steel bracket 3) through the lower end plate, forming a complete force system and ensuring the long-term stability of the structure.

[0058] Lower end installation accuracy compensation: The lower hinge support is precisely positioned during synchronous installation with the main structure, and its relative position error with the upper hinge support is controlled within the design allowable range; at the same time, the angle fine adjustment function of the lower end plate can compensate for the small position deviation generated during the rotation of the inclined column, ensuring that the upper and lower ends are flush and the weld gap is uniform.

[0059] Construction safety protection assistance: Before the lower end of the inclined column is rotated to the docking position, the lower hinged support can be used as a "temporary limit reference". During construction, by measuring the relative distance between the lower end of the inclined column and the support, excessive rotation or displacement of the inclined column can be avoided, reducing the risk of high-altitude docking operations.

[0060] S7. Installation complete.

[0061] After the lower end plate 6 is connected to the lower end port 12 of the inclined column 7, remove the lifting equipment hook 13 and the wire rope to complete the rotation method installation of the inclined column 7.

[0062] When adjusting the hoisting angle in step S3, ensure that the upper end plate 8 is parallel to the axis of the mounting hole of the upper hinge support 9.

[0063] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A construction method for rotating and installing spindle-shaped inclined columns under a large cantilever structure, characterized in that: Includes the following steps: S1. Install steel columns (1) and auxiliary steel brackets (3), and large cantilever trusses (2). First, install the main steel column (1) and auxiliary steel bracket (3) of the main steel structure, then install the large cantilever truss (2), and at the same time install the lower hinge support (4) and the upper hinge support (9). S2. Install the lower end plate (6) and adjust the lower end plate (6) to a suitable angle. The lower end plate (6) is connected to the lower hinge support (4) by a pin (5), and a chain hoist (11) is set to pull the lower end plate (6) so that it can rotate at a suitable angle under control. S3, the inclined column (7) is lifted and the upper end is fixed. The inclined column (7) is connected to the wire rope and shackle on the hook (13) of the lifting equipment. After adjusting the lifting angle, the inclined column (7) is slowly lifted so that the upper end plate (8) of the inclined column (7) is inserted into the upper hinge support (9). The hook (13) is swung appropriately to align with the mounting hole. The pin (10) is inserted to lock the upper end plate (8) and the upper hinge support (9) together. S4, the inclined column (7) hangs down naturally and the hook is loosened. Swing the inclined column (7) freely to a natural hanging state, then loosen the hook (13) of the lifting equipment and disconnect the wire rope from the shackle; S5. Shift the lifting point and raise the lower end of the inclined column. Move the hook (13) of the lifting equipment to a predetermined distance above the lower port (12) of the inclined column (7) to set a lifting point, lock the wire rope and shackle, slowly lift the lower port (12) around the upper hinge support (9), rotate the lower port (12) to below the lower hinge support (4) and pause, measure the relative distance between the lower port (12) and the lower hinge support (4); S6. Connect the lower end plate to the lower port of the inclined column. After confirming that the relative distance meets the requirements after retesting, continue to rotate the inclined column (7) closer to the lower end plate (6), and at the same time, use the chain hoist (11) to adjust the angle of the lower end plate (6) so that the lower end plate (6) and the lower port (12) of the inclined column (7) are aligned and connected. S7. Installation complete. After the lower end plate (6) is connected to the lower end port (12) of the inclined column (7), remove the lifting equipment hook (13) and wire rope to complete the rotation method installation of the inclined column (7).

2. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: In step S1, the auxiliary steel bracket (3) is horizontally installed on one side of the steel column (1).

3. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: One end of the chain hoist (11) is mounted on the steel column (1), and the other end of the chain hoist (11) is connected to the lower end plate (6).

4. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: In step S6, the lower end plate (6) and the lower port (12) of the inclined column (7) are aligned and the weld gap is uniform. The lower end plate (6) and the lower port (12) of the inclined column (7) are positioned and welded together.

5. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: When adjusting the hoisting angle in step S3, ensure that the upper end plate (8) is parallel to the axis of the mounting hole of the upper hinge support (9).

6. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: The lower hinge support (4) is installed at the end of the auxiliary steel bracket (3).

7. The construction method for rotating and installing a spindle-shaped inclined column under a large cantilever structure according to claim 1, characterized in that: The upper hinge support (9) is installed at the lower end of the large cantilever truss (2).

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