Characteristics and regulations of Xirong steel structure engineering installation technology

Steel structure is one of the more common structural forms in modern construction projects. Steel structure engineering installation technology is more and more widely used in China, and many advantages of steel structure have also been valued, and the application of steel structure engineering has also increased. The installation technical requirements of Xirong steel structure steel structure engineering, so as to strengthen the technical application and management of steel structure engineering and ensure the safety of the entire steel structure project.

Single-layer portal rigid frame installation

The single-span structure should be hoisted from one side of the span to the other, the middle to both ends or both ends to the middle. Multi-span structure, it is advisable to hang the main span first, and the secondary span later; When there are multiple cranes working together, multiple spans can also be hoisted at the same time. The single-layer portal rigid frame steel structure should be installed in the order of columns, connecting beams, inter-column supports, crane beams, roof trusses, purlins, roof supports, and roof panels.

During the installation

of the portal rigid frame structure, it is necessary to install temporary inter-column support or stabilize the cable wind rope in time, and the installation can be extended after forming a spatial structure stability system. The spatial structure stabilization system should be able to withstand the self-weight of the structure, wind load, snow load, seismic action, installation load and impact load during hoisting.

Multi-storey, high-rise steel structure engineering installation

(1) The installation of multi-storey and high-rise steel structure projects should be divided into multiple assembly operation sections, and the flow section should be based on each section frame. The division of the assembly section shall comply with the following provisions:

1) The most reconstructed parts in the flow section should be within the lifting capacity of the lifting machinery;

2) The climbing height of the lifting equipment should meet the lifting height of the components in the lower throttle section;

3) The length of the column in each section should be determined according to factors such as factory processing, transportation and stacking, on-site hoisting, etc., the length should be taken from 2 to 3 floor heights, and the sub-section location should be 1.0 to 1.3m above the beam layer elevation;

4) The division of the flow section of the steel structure should be compatible with the installation of the concrete structure;

5) Each section of the flow section can be installed by dividing the flow area on the plane according to the structural characteristics and site conditions.

(2) The lifting of components in the assembly operation section should comply with the following provisions:

1) The hoisting can adopt the order of first column and then beam in the entire flow section, or the order of local first column and then beam; The single column must not be in a cantilever state for a long time;

2) The installation of steel floor slabs and profiled metal plates should be synchronized with the hoisting progress of components;

3) The lifting sequence in the special flow section should be determined according to the installation process and should meet the requirements of the design documents.

(3) The installation and correction of multi-storey and high-rise steel structures shall be carried out according to the reference column and shall comply with the following regulations:

1) The reference column should be

able to control the plane size of the building and facilitate the correction of other columns, and the corner column should be selected as the reference column;

2) Suitable measuring instruments and calibration tools should be used for steel column calibration;

3) The reference column should be corrected before the other columns are calibrated.

(4) When multi-storey and layered steel structures are installed, the floor elevation can be controlled by relative elevation or design standard, and shall comply with the following provisions:

1) When the design level control is adopted, the column elevation adjustment should be carried out in the unit of each section column, and the elevation of each section column should meet the requirements of the design;

2) The allowable deviation of the total height of the building and the height difference of the column top of each section of the column in the same floor should comply with the relevant provisions of the current national standard "Code for Quality Acceptance of Steel Structure Engineering Installation" GB50205.

For a section column of the same

flowing operation section and the same installation height, when all the components of each column are installed, calibrated, connected and accepted, the positioning axis of the previous section column should be led from the ground. When installing high-rise steel structures, the influence of vertical compression deformation on the structure should be analyzed, and corresponding measures such as pre-adjusted installation elevation and connecting members after setting should be taken according to the characteristics and degree of influence of the structure.

Sichuan Xirong Steel Structure Construction Engineering Co., Ltd. is one of the largest companies in Sichuan steel structure industry, the company's predecessor is Qingyang District Supo Township Xirong Steel Structure Engineering Department was established in 2003, after more than ten years of development, in the construction process has accumulated rich experience, has a group of experienced, comprehensive, well-trained engineering and technical personnel and professional production and installation team.