Construction method for super high-rise steel structure supporting system

Abstract

The invention discloses a construction method for a super high-rise steel structure supporting system, and relates to the technical field of high-rise steel structure construction.The construction method comprises the steps that profile steel supports and steel beams connected with the profile steel supports are fixed through temporary fixing bolts on a working platform according to a construction design drawing, and then the profile steel supports and the steel beams form an integral unit through reinforcing devices; hoisting the reinforced integral unit and mounting a steel beam at a specified position according to the requirement of a construction drawing; after the steel beam is installed, the reinforcing device is dismantled, meanwhile, fixing and hoisting of a next unit are conducted, a pulley inhaul cable tool is used for aligning a profile steel support and a connecting bracket, a temporary fixing bolt is replaced with a high-strength bolt and fixed, at the moment, the high-strength bolt only needs to be screwed initially, and the applied torque To is equal to 0.065 * Pc * d; pc is the pretension force of the high-strength bolt; d is the diameter of the bolt; after all the steel beams are installed, the high-strength bolts are finally screwed within 24 hours after initial screwing, the applied torque Tc is equal to k * Pc * d, k is a torque coefficient, and finally the flanges of the profile steel supports are welded to the brackets. According to the construction method, the construction efficiency is greatly improved, the construction cost is reduced, and the construction safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of high-rise steel structure construction, and in particular to a construction method for a super-high-rise steel structure support system. Background Art

[0002] In the super high-rise steel structure system, the steel support structure plays the role of a shear wall. However, the current super high-rise steel structure construction process is generally: first install the steel column, then install the steel beam, and then install the support to make it a complete frame system. Because the installation of the steel support is carried out after the installation of the steel column and steel beam, this brings a series of problems. For example, the steel support is generally obliquely intersected within the frame composed of the steel beam and the steel column. It is difficult to put it in place at one time during hoisting, and other tools are needed to assist in completion, which consumes more manpower and material resources; at the same time, the support installation and positioning is difficult and dangerous; during construction, the supports need to be hoisted separately, which is not only costly, but also has a long construction period. Summary of the invention

[0003] In view of one or more of the above existing problems, the present invention proposes a construction method for a super high-rise steel structure support system.

[0004] The present invention provides a steel support system for a super high-rise steel structure. The construction method is used for the support system. The construction method specifically comprises the following steps: Step S1. According to the construction design drawing, the steel support and the connected steel beam are fixed with temporary fixing bolts on the working platform, and then the steel support and the steel beam are formed into an integral unit by a reinforcement device; Step S2. Lift the reinforced whole unit and install the steel beam at the specified position according to the requirements of the construction drawings. The lifting should be performed by professionals. A trial lift must be carried out before lifting to confirm that it is correct before the operation can be carried out; Step S3. After the steel beam is installed, the reinforcement device is removed, and the next unit is fixed and lifted at the same time. The steel support and the connecting bracket are aligned using a pulley cable tool, and the temporary fixing bolts are replaced with high-strength bolts and fixed. At this time, the high-strength bolts only need to be initially tightened, and the applied torque To=0.0*Pc*d; Pc is the pre-tension of the high-strength bolt; d is the bolt diameter; Step S4. After all the steel beams are installed, the high-strength bolts are finally tightened. The final tightening must be completed within hours after the initial tightening. At this time, the torque applied is Tc=k*Pc*d, where k is the torque coefficient. Finally, the flange of the steel support is welded to the bracket. Steel beam is a general term for the upper steel beam and the lower steel beam.

[0005] As a feasible preferred method, the support system includes a pair of steel columns and a pair of profiled steel supports, an upper steel beam is provided between the upper ends of the steel columns, a lower steel beam is provided between the lower ends of the steel columns, the upper part of the profiled steel support is fixed to the upper steel beam, the lower part of the profiled steel support is fixed to the steel column and the lower steel beam, the two profiled steel supports are symmetrically distributed, the profiled steel support and the upper steel beam, the profiled steel support and the lower steel beam and the steel column are supported and fixed by connecting brackets, and pulley cables are provided at both ends of the bottom of the upper steel beam; The upper steel beam and steel column, the lower steel beam and steel column, and the steel support and connecting corbel are fastened by high-strength bolts respectively. The upper parts of the two steel supports are spliced ​​by connecting corbels. The steel supports are distributed in an inclined shape. Stiffening plates are provided in the steel columns.

[0006] As a feasible and preferred method, the reinforcement device is composed of double-channel steel and connecting fasteners. The reinforcement device must have sufficient rigidity to meet various technical requirements for overall lifting after the support and steel beam are assembled.

[0007] As a feasible preferred method, the working platform refers to the ground or an intermediate construction platform. For the convenience of assembly, a tire frame needs to be temporarily set up.

[0008] The advantages of the present invention are: The construction method of the present application assembles the steel support and the steel beam into an integral unit in advance, which reduces the number of hoisting times and improves the efficiency of construction machinery; after the steel beam is installed, the support is initially aligned and installed, which greatly shortens the construction period; the fixing device can be reused many times, and significantly reduces the danger of the steel support installation operation. Therefore, the construction method for the super high-rise steel structure support system of the present invention improves construction efficiency, reduces construction costs, and enhances construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of this application. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0012] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0013] like Figure 1 As shown, a construction method for a super high-rise steel structure support system is provided. The construction method is used for the support system and specifically comprises the following steps: Step S1. According to the construction design drawing, the steel support and the connected steel beam are fixed with temporary fixing bolts on the working platform, and then the steel support and the steel beam are formed into an integral unit by a reinforcement device; Step S2. Lift the reinforced whole unit and install the steel beam at the specified position according to the requirements of the construction drawings. The lifting should be performed by professionals. A trial lift must be carried out before lifting to confirm that it is correct before the operation can be carried out; Step S3. After the steel beam is installed, the reinforcement device is removed, and the next unit is fixed and lifted at the same time. The steel support and the connecting bracket are aligned using a pulley cable tool, and the temporary fixing bolts are replaced with high-strength bolts and fixed. At this time, the high-strength bolts only need to be initially tightened, and the applied torque To=0.065*Pc*d; Pc is the pre-tension of the high-strength bolt; d is the bolt diameter; Step S4. After all the steel beams are installed, the high-strength bolts are finally tightened. The final tightening must be completed within 24 hours after the initial tightening. At this time, the applied torque Tc=k*Pc*d, k is the torque coefficient, and finally the flange and the bracket of the steel support are welded.

[0014] Therefore, the present application effectively solves the difficult problems of difficult steel support construction and long construction period, making the steel structure construction fast and low-cost.

[0015] As shown in the figure, the support system includes a pair of steel columns 1 and a pair of steel supports 2. An upper steel beam 3 is provided between the upper ends of the steel columns 1, and a lower steel beam 4 is provided between the lower ends of the steel columns 1. The upper part of the steel support 2 is fixed to the upper steel beam 3, and the lower part of the steel support 2 is fixed to the steel column 1 and the lower steel beam 4. The two steel supports 2 are symmetrically distributed. The steel support 2 and the upper steel beam 3, the steel support 2 and the lower steel beam 4 and the steel column 1 are supported and fixed by connecting brackets 5, and pulley cables 6 are provided at both ends of the bottom of the upper steel beam 3. The upper steel beam 3 and the steel column 1, the lower steel beam 4 and the steel column 1, and the steel support 2 and the connecting corbel 5 are fastened respectively by high-strength bolts 7. The upper parts of the two steel supports 2 are spliced ​​by the connecting corbel 5. The steel supports 2 are distributed in an inclined shape. A stiffening plate 8 is provided in the steel column 1.

[0016] The reinforcement device is composed of double channel steel and connecting fasteners. The reinforcement device must have sufficient rigidity to meet the various technical requirements for overall lifting after the support and steel beam are assembled.

[0017] The working platform refers to the ground or the intermediate construction platform. In order to facilitate assembly, a temporary frame needs to be set up.

[0018] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A construction method for a super high-rise steel structure support system, characterized in that: The construction method is used for supporting the system, and the construction method specifically comprises the following steps: Step S1. According to the construction design drawing, the steel support and the connected steel beam are fixed with temporary fixing bolts on the working platform, and then the steel support and the steel beam are formed into an integral unit by a reinforcement device; Step S2. Lift the reinforced whole unit and install the steel beam at the specified position according to the requirements of the construction drawings. The lifting should be performed by professionals. A trial lift must be carried out before lifting to confirm that it is correct before the operation can be carried out; Step S3. After the steel beam is installed, the reinforcement device is removed, and the next unit is fixed and lifted at the same time. The steel support and the connecting bracket are aligned using a pulley cable tool, and the temporary fixing bolts are replaced with high-strength bolts and fixed. At this time, the high-strength bolts only need to be initially tightened, and the applied torque To=0.065*Pc*d; Pc is the pre-tension of the high-strength bolt; d is the bolt diameter; Step S4. After all the steel beams are installed, the high-strength bolts are finally tightened. The final tightening must be completed within 24 hours after the initial tightening. At this time, the applied torque Tc=k*Pc*d, k is the torque coefficient, and finally the flange and the bracket of the steel support are welded.

2. A construction method for a super high-rise steel structure support system according to claim 1, characterized in that: The support system comprises a pair of steel columns (1) and a pair of steel supports (2), an upper steel beam (3) is arranged between the upper ends of the steel columns (1), a lower steel beam (4) is arranged between the lower ends of the steel columns (1), the upper part of the steel support (2) is fixed to the upper steel beam (3), the lower part of the steel support (2) is fixed to the steel column (1) and the lower steel beam (4), the two steel supports (2) are symmetrically distributed, the steel support (2) and the upper steel beam (3), the steel support (2) and the lower steel beam (4) and the steel column (1) are supported and fixed by connecting brackets (5), and pulley cables (6) are respectively arranged at both ends of the bottom of the upper steel beam (3); The upper steel beam (3) and the steel column (1), the lower steel beam (4) and the steel column (1), and the steel support (2) and the connecting bracket (5) are fastened by high-strength bolts (7), the upper parts of the two steel supports (2) are spliced ​​by the connecting bracket (5), and the steel supports (2) are distributed in an inclined shape; and a stiffening plate (8) is provided in the steel column (1).

3. A construction method for a super high-rise steel structure support system according to claim 2, characterized in that: The reinforcement device is composed of double channel steel and connecting fasteners, and the reinforcement device must have sufficient rigidity to meet various technical requirements for overall lifting after the support and steel beam are assembled.

4. A construction method for a super high-rise steel structure support system according to claim 3, characterized in that: The working platform refers to the ground or an intermediate construction platform. For the convenience of assembly, a tire frame needs to be temporarily set up.

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