Unloading device for large cantilever steel structure supported overhanging construction

Abstract

The utility model relates to the technical field of steel structures, in particular to an unloading device for support overhanging construction of a large overhanging steel structure, which comprises a circular pipe support, a distribution beam assembly, a sand box unloading device, an adjusting upright post assembly and adjusting profile steel, a distribution beam assembly is arranged at the upper end of the circular tube support; the upper end of the distribution beam assembly is provided with a sand box unloading device and adjusting stand column assemblies, and the adjusting stand column assemblies are distributed around the sand box unloading device. Adjusting profile steel is arranged at the upper end of the sand box unloading device; the upper ends of the adjusting profile steel and the adjusting stand column assembly jointly support a boundary beam. The problem of unloading construction of a supporting system of a large-cantilever nonlinear stress characteristic structure is solved, uniform stress conversion of the structure during support dismantling is guaranteed, uniform stress of the structure in the unloading process is guaranteed, the forming quality of the structure is guaranteed, the safety of the structure is guaranteed, support unloading is achieved, and good economic benefits are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel structures, and in particular relates to a supported cantilever construction and unloading device for large cantilever steel structures. Background Art

[0002] Most buildings have novel shapes, and the structural analysis is completely different from the stress state of the structure during actual construction. In addition, the geometric dimensional accuracy of the structure is extremely high, the unloading requirements are complex, and there is no precedent for structural safety during construction. When large cantilever steel structures are supported for construction, in order to avoid excessive stress at local points during construction, the support cradle rotates from the small cantilever end to the large cantilever end according to the construction progress of the cantilever structure, and the stress at the small cantilever end is released in advance during the rotation. The removal of the support cradle causes changes in the structural system and redistribution of stress, which can easily lead to secondary deformation. Therefore, the unloading order and method of the support cradle of the overall structure directly affect the stress changes of the entire structure. Therefore, there is an urgent need for an unloading device for large cantilever steel structure with support overhang construction to solve the above problems. Utility Model Content

[0003] In view of the problems existing in the above-mentioned existing construction technology, the utility model provides a support and overhang construction unloading device for large cantilever steel structures to ensure that the force of the structure is evenly converted when the support is removed.

[0004] The utility model proposes a supported overhang construction unloading device for large cantilever steel structures, comprising: a circular tube support, a distribution beam assembly, a sand box unloading device, an adjusting column assembly and an adjusting steel section; the upper end of the circular tube support is provided with the distribution beam assembly; the upper end of the distribution beam assembly is provided with the sand box unloading device and the adjusting column assembly, and the adjusting column assemblies are distributed around the sand box unloading device; the upper end of the sand box unloading device is provided with the adjusting steel section; the upper ends of the adjusting steel section and the adjusting column assembly jointly support a boundary beam.

[0005] Furthermore, the distribution beam assembly includes a first distribution beam arranged transversely and a second distribution beam arranged longitudinally; the first distribution beam and the second distribution beam are arranged in a cross shape.

[0006] Furthermore, two sides of the central area of ​​the first distribution beam are respectively connected to a second distribution beam.

[0007] Furthermore, the flask unloading device is connected to the upper end of the central area of ​​the first distribution beam.

[0008] Furthermore, the adjusting column assemblies are provided at both ends of the first distribution beam.

[0009] Furthermore, the adjusting column assembly includes a first adjusting column and a second adjusting column; the first adjusting column and the second adjusting column are respectively arranged at two ends of the first distribution beam.

[0010] Furthermore, the heights of the first adjustment column, the adjustment steel and the second adjustment column increase sequentially.

[0011] Furthermore, the circular tube support is provided at a position of the lower end of the first distribution beam facing the first adjustment column and the second adjustment column.

[0012] Furthermore, the upper end of the first distribution beam and the upper end of the second distribution beam are in the same horizontal plane, and the lower end of the first distribution beam and the lower end of the second distribution beam are in the same horizontal plane.

[0013] Furthermore, a stiffening plate is provided at a connection node between the top of the circular tube support and the distribution beam assembly.

[0014] The beneficial effects of the present invention are as follows: by arranging a sand box unloading device and an adjusting column assembly on the distribution beam assembly, during the unloading process, the sand box unloading device gradually unloads and supports the boundary beam, and after reaching the unloading elevation, the adjusting column assembly and the adjusting steel sections on the sand box unloading device are used to jointly support the boundary beam, and according to the predetermined unloading release amount, the sand box unloading device is controlled to gradually unload, thereby solving the unloading construction problem of the support system of the large cantilever structure with nonlinear force characteristics, ensuring the uniform conversion of force when the support is removed, ensuring the uniform force of the structure during the unloading process, ensuring the quality of the structural forming, ensuring the safety of the structure, realizing the unloading of the support, and having good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the unloading device for cantilevered steel structure after unloading.

[0016] Figure 2 for Figure 1 Structural diagram of the unloading device;

[0017] Figure 3 for Figure 2 Schematic diagram of the top view structure;

[0018] Figure 4 This is a structural diagram of the unloading device of the utility model before unloading.

[0019] In the figure: 10-circular tube support; 20-first distribution beam; 21-second distribution beam; 30-sand box unloading device; 40-first adjustment column; 41-second adjustment column; 50-adjustable steel; 60-dividing beam. DETAILED DESCRIPTION

[0020] The following is a further detailed description of this application with reference to the accompanying drawings and specific implementations:

[0021] like Figure 1-Figure 4 The unloading device shown is used for the construction of a large cantilever steel structure with a support cantilever, including: a round tube support 10, a distribution beam assembly, a sand box unloading device 30, an adjustment column assembly and an adjustment steel 50.

[0022] The distribution beam assembly includes a first distribution beam 20 arranged transversely and a second distribution beam 21 arranged longitudinally. The first and second distribution beams 20 and 21 are arranged in a cross configuration. A second distribution beam 21 is connected to each side of the central region of the first distribution beam 20. The flask unloading device 30 is connected to the upper end of the central region of the first distribution beam 20. The upper end of the first distribution beam 20 and the upper end of the second distribution beam 21 are aligned horizontally, while the lower end of the first distribution beam 20 and the lower end of the second distribution beam 21 are aligned horizontally.

[0023] The adjustment column assembly includes a first adjustment column 40 and a second adjustment column 41, respectively disposed at each end of the first distribution beam 20. The first distribution beam 20 is positioned parallel to and below the demarcation beam 60. The heights of the first adjustment column 40, the adjustment steel 50, and the second adjustment column 41 increase in order. A circular tube support 10 is installed at the lower end of the first distribution beam 20, directly opposite the first and second adjustment columns 40 and 41. Of course, circular tube supports 10 are also installed at each end of the second distribution beam 21.

[0024] A stiffening plate is provided at the connection node between the top of the circular tube support 10 and the distribution beam assembly. Stiffening plates are also provided at the support and force transmission positions of the unloading device.

[0025] In some embodiments, the upper ends of the first adjustment column 40 and the second adjustment column 41 are respectively provided with a temporary support column for easy removal; the temporary support column is connected to the upper end of the first adjustment column 40 or the second adjustment column 41 by bolts. After the temporary support column is removed, the top of the first adjustment column 40 and the second adjustment column 41 is the unloading completion elevation. The state of the first adjustment column 40 and the second adjustment column 41 after the temporary support column is removed is as follows: Figure 4 shown.

[0026] In this embodiment, the boundary beam 60 can be regarded as a part of a large cantilever steel structure or a cantilever structure. The flask unloading device 30 adopts the existing technology, which generally includes a flask body, an hourglass device disposed in the flask body, and sand filled in the hourglass device.

[0027] The construction process of the unloading device of this embodiment is as follows:

[0028] Uninstallation preparation:

[0029] The unloading device is installed and the sand box unloading device 30 is in place.

[0030] Uninstallation process:

[0031] 1. Before installing the boundary beam 60, install the adjustment column assembly and the sand box unloading device 30 between the tire frame and the boundary beam 60, and ensure that the contact surface between the boundary beam 60, the adjustment column assembly and the sand box unloading device 30 are tightly pressed;

[0032] 2. After the unloading device is installed and before unloading, remove or disassemble the top structure of the adjustment column assembly to the unloading completion elevation. For example, remove the temporary support columns at the upper ends of the first adjustment column 40 and the second adjustment column 41. The load transmission path of the end of the cantilever structure is transferred from the adjustment steel 50 to the sand box unloading device 30; observe the machine for at least 1 hour.

[0033] 3. According to the unloading steps, unified command, according to the predetermined unloading release amount, control the sinking displacement of the sand in the hourglass device of the sand box unloading device 30;

[0034] 4. Operate the hourglass device and follow the uninstallation steps, repeating the steps until the uninstallation is complete.

[0035] Since the total unloading stroke is small and the total unloading stroke is simulated data, not necessarily the final actual data, the sand box unloading device 30 is used in this case for unloading:

[0036] That is, first obtain the initial unloading pressure value as the starting value of the entire construction process;

[0037] The whole unloading process is divided into 10 stages, with pressure control as the main method and the pressure drop in each stage not exceeding 10%;

[0038] The unloading process in each stage is divided into several times, mainly based on displacement control. The displacement of each unloading point is no more than 1mm during each drop process to ensure the safety of the superstructure.

[0039] During the above unloading process, the interval between each stage shall not be less than 0.5 hours.

[0040] Uninstallation complete:

[0041] Until the sand box unloading device 30 is separated from the entire structure, the temporary structures such as the lower distribution beam assembly and the round tube support 10 are removed, and data is sorted, the overall unloading is completed.

[0042] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for unloading the cantilevered construction of a large cantilevered steel structure, characterized in that: include: Circular tube support, distribution beam assembly, sand box unloading device, adjustment column assembly and adjustment steel; the upper end of the circular tube support is provided with the distribution beam assembly; the upper end of the distribution beam assembly is provided with the sand box unloading device and the adjustment column assembly, and the adjustment column assembly is distributed around the sand box unloading device; the upper end of the sand box unloading device is provided with the adjustment steel; the upper ends of the adjustment steel and the adjustment column assembly jointly support a dividing beam.

2. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 1, characterized in that: The distribution beam assembly includes a first distribution beam arranged transversely and a second distribution beam arranged longitudinally; the first distribution beam and the second distribution beam are arranged in a cross shape.

3. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 2, characterized in that: Two sides of the central area of ​​the first distribution beam are respectively connected to a second distribution beam.

4. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 3, characterized in that: The flask unloading device is connected to the upper end of the central area of ​​the first distribution beam.

5. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 3, characterized in that: The adjusting column assemblies are provided at both ends of the first distribution beam.

6. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 5, characterized in that: The adjusting column assembly includes a first adjusting column and a second adjusting column; the first adjusting column and the second adjusting column are respectively arranged at two ends of the first distribution beam.

7. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 6, characterized in that: The heights of the first adjustment column, the adjustment steel and the second adjustment column increase sequentially.

8. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 6, characterized in that: The circular tube support is provided at a position where the lower end of the first distribution beam is directly opposite to the first adjustment column and the second adjustment column.

9. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 2, characterized in that: The upper end of the first distribution beam and the upper end of the second distribution beam are in the same horizontal plane, and the lower end of the first distribution beam and the lower end of the second distribution beam are in the same horizontal plane.

10. The unloading device for cantilevered construction of large cantilevered steel structures according to claim 1, characterized in that: A stiffening plate is provided at a connection node between the top of the circular tube support and the distribution beam assembly.

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