Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
Light steel structure has many advantages and has developed rapidly in a modern society, and today, light steel structure has been involved in all aspects of residents’ lives. In order to successfully and efficiently complete the building construction project, the following light steel structure installation, specific operation and maintenance issues are discussed in detail.
The light steel structure needs to be prepared in the early stage of installation: construction technicians choose qualified building materials, welding equipment and testing equipment at the time of completion, construction personnel need to have the qualification certificate issued by the state, and in the construction process in accordance with the relevant national standards for construction.
(1) column foot installation
First, when the steel frame of the light steel structure is carried out in the house ceiling, there will be some artificial unavoidable lateral pressure, and it will cause damage to the column top. When the column foot is embedded, the outer bolt should not be too close to the column foot, and a certain distance should be left with the column foot. At the same time, it is necessary to ensure that it can reach a certain strength before the steel frame can be suspended.
Second, when calculating the design of the column foot that can withstand the pressure, it is not necessary to consider its bearing capacity. If there is no specific shear component for it, the shear force generated by the seismic load, crane load and crosswend load is almost all borne by the column foot, resulting in serious damage to the column foot.
Third, the gap between the column feet is too small, resulting in the grouting work is difficult to complete, generally the gap of grouting again is 50 mm.
Fourth, the position of the column feet of some construction projects is not accurate, but in order to ensure that the steel frame can be accurately in place, the construction site is twice drilled and arbitrarily cut, and the opening hole of the column bottom plate is too large, making the stability of the column feet is not strong, and can not meet the construction standards.
(2) Connection and installation between beams and columns
The middle column of multi-span portal steel frame needs to be designed according to the swing column, but in the actual construction process, the inclined beam and the middle column are welded tightly, which leads to the actual construction is not in line with the design drawings, and it is easy to cause construction accidents. Therefore, the construction personnel need to carry out construction in strict accordance with the design drawings.
When the flange plate is welded on the thickened or widened connection plate, it is not made into an excessively inclined style according to the construction requirements. For welded joints, if the thickness or width of the member is not the same, and the difference distance on the side of the same direction reaches more than 4 mm, it should be made from the same side of the width or thickness of the tilt Angle is not greater than 1:4.
Because the cutting of the construction personnel is not smooth enough, resulting in the joint of the top plate surface is rough, or improper operation when welding with the edge of the beam and column, making the shape of the top plate bending and deformation, resulting in the contact between the top plate surface is not consistent, the connected bolt can not bear a certain force load, resulting in the joint position can not withstand tensile bending and other specific properties.
When welding steel frame beams and columns, the joints of two bottom plates are placed on the same horizontal section, which is easy to cause safety hazards. When welding joints, the joints of the two baseplates should be staggered a certain distance according to the construction regulations.
When the steel frame beam and column are welded, the corresponding stiffening equipment is not set at the joint of the load borne, which is easy to lead to the phenomenon of the compression of the building structure and its local imbalance.
In the specific construction, the connection bolts do not meet the relevant regulations of building construction, and should be strengthened and tightened repeatedly at the nodes of large structures. The tightening work should be completed on the same day, and the final screwing link cannot be omitted. After the installation of the structure is complete, the construction personnel need to carefully check the connected bolts to avoid missing or loose phenomena.
Some construction projects lack some professional suspended ceiling schemes. If temporary measures are not taken to ensure the stability of the steel frame in the initial stage of the suspended steel frame, it will cause the collapse of the steel frame. The column near the wall should be installed first, and then the other steel frames should be installed.
(3) Installation of sandalwood jump and support
In order to ensure the smooth installation, the sandalwood can be lengthened, because the role of sandalwood is not only used to support the components of the wall panel, but also can play a supporting role in the beam and column of the steel frame, which can reduce the calculated length of the steel frame and can straighten the stability of the steel frame. If the holes of sandalwood strips are too large, they will lose their due function.
In the connection with the steel beam, when the steel frame is subjected to external pressure, it will cause the local loss of stability of the steel beam.
Because there are many openings in the wall, the vertical end is moved without permission. The stable system formed by the support and steel frame between the same area, if it is arbitrarily moved, it will destroy its overall stability.
In order to save costs and construction personnel, some construction units will cancel the force between the sandalwood bar and the beam column, which will seriously affect the reliability of the sandalwood bar under pressure. Therefore, the construction unit can not reduce any link in the construction drawings for any reason.
Conclusion:
In recent years, with the continuous development and progress of science and technology in our country, our economic construction has made rapid progress to a certain extent. Light steel structure is widely used in the construction of our country, and it has the characteristics of strong stability, strong corrosion resistance and strong thermal insulation, which ensures the construction quality of housing construction to a certain extent.
