Precautions during the assembly process of welding H-shaped steel

Precautions during the assembly process of welding H-shaped steel

1. It is necessary to ensure that high-frequency welding of H-shaped steel passes quality testing and meets the specified quality standards. Check the size specifications of the section steel to ensure compliance with the drawing requirements, otherwise successful assembly cannot be achieved.

2. The steel structure company should prepare relevant materials in advance according to the actual situation, such as overhead contact network, high-frequency welded H-shaped steel column, cantilever base, anchor device base, additional wire shoulder frame, equipment base, cable fixing bracket, and grounding connection device.

3. Steel structure assembly companies must have complete qualifications and must not blindly assemble without understanding the process. Otherwise, it not only causes waste of steel, but also seriously endangers the safety of steel structure factories. After the assembly of the steel column is completed, a quality inspection should be conducted again, and the monitoring should meet the following standard requirements: the shape of the steel column must meet the requirements of the design drawings, the surface quality should also meet the design standards, and the link structure must be stable. To avoid the collapse of the entire building due to inconsistent design and installation. The compressive strength and tensile strength of steel columns are two very important indicators to ensure that they meet the standards. Steel structure companies should pay attention to the selection of materials for steel columns based on the local natural environment, such as choosing lightweight materials in earthquake prone areas.

4. The deflection standard of steel columns mainly corresponds to the wind resistance of the building, and there should be no obvious bending when the steel columns reach the boundary of the support.

When we choose to use H-shaped steel piles as the foundation pit enclosure structure, we need to check the stability of the foundation pit and surrounding environment in real time, and continuously observe the cracking and deformation of adjacent surface and ground objects throughout the entire construction and excavation process. In general, small cracks on the surface and slight cracks in the decoration layer of buildings adjacent to the foundation pit can be considered normal, but the development trend must be closely tracked and special treatment measures must be taken in a timely manner. When cracks continue to accelerate and extend, the original construction process must be stopped, support parameters must be modified, and reinforcement must be carried out in a timely manner. When the lateral displacement at the top of the foundation pit exceeds three thousandths of the excavation depth at that time, close observation should be strengthened and emergency reinforcement measures should be taken for the support in a timely manner. If necessary, other support structures should be added, such as using effective methods such as driving Larsen steel sheet piles.

The construction of H-shaped steel should first determine the excavation boundary of the foundation pit according to the construction drawing. The scope of the foundation pit can be determined using a white ash line. Then, the position of H-shaped steel piles should be determined according to the design requirements on the white ash line, and the white ash points should be marked. Before construction, the semi-finished piles should be transported to the appropriate position according to the predetermined construction sequence. The pile driver and extractor should be used to complete the pile driving in a short time to determine the more suitable stacking position, The distance from the stacking center to the support position should be 10 to 20 meters. When pile connection is required on site, the quality of the connection must strictly comply with relevant regulations, and the interface must meet the bending and shear resistance requirements of the pile. The welding joint should be beveled and fully welded, and the welding joint position should be avoided as much as possible in places with large bending moments. British standard H-shaped steel