Steel truss floor slabs are the core building materials of prefabricated steel structures. With advantages such as factory prefabrication, precise steel positioning, fast on-site construction speed, and good structural integrity, they are widely used in residential, commercial complexes, schools, and industrial plants. Compared with the traditional on-site reinforcement binding process, it significantly reduces the amount of on-site work, effectively shortens the construction period, and improves the quality of concrete forming and structural safety factor of the floor. Standardized and standardized construction is the key to ensuring the bearing capacity of the floor and controlling engineering costs.
Accurate preparation work should be done in the early stage of construction. Firstly, the architectural drawings should be checked, and the type and layout plan of the floor support plate should be determined based on the spacing between steel beams and floor loads. The debris on the steel structure beam surface should be cleaned in advance, and the elevation and flatness of the steel beams should be calibrated to ensure that the support base surface is flat and firm. Cut the boards in advance according to the construction dimensions, prevent arbitrary cutting of the main reinforcement of the truss on site, and avoid damaging the structural stress system. At the same time, set up reserved hole positions in advance to reduce the need for later hole opening and rectification.
During the on-site laying phase, the principle of "orderly laying from one end to the other" is followed, with tightly aligned panels and tight joints, accurately overlapping on the steel structure beam to ensure that the overlapping length meets the specification requirements. After the laying is completed, spot welding should be carried out in a timely manner to fix and strictly control the deviation and edge curling of the board, ensuring that the overall board surface is flat and straight. For weak areas such as board joints and corners, it is necessary to provide sealing treatment to prevent quality defects such as leakage, honeycomb and rough surface during later concrete pouring.
The key construction focus of the steel truss floor slab core is the concrete pouring process, which needs to be carried out in layers and at a uniform speed to avoid concentrated stacking and instantaneous heavy pressure causing deformation of the slab and displacement of the steel beam. Simultaneously carry out vibration and compaction work to ensure a tight bond between concrete and truss steel bars. After forming, timely carry out maintenance operations to strictly control quality problems such as cracking and sanding. Standardized construction can not only ensure the stability of the floor structure, but also effectively optimize the stress state of steel beams, avoid structural reinforcement and steel weight increase caused by construction defects, and effectively achieve the construction goals of improving quality, increasing efficiency, and reducing costs.
