In construction, the installation of precast concrete slabs is a crucial step, and screw jacks play an important role in this process.

After the precast concrete slab is lifted to the designated position, due to various factors, its horizontal position may deviate and cannot accurately meet the design requirements. At this point, the screw jack comes in handy. The worker places the screw jack at a suitable support point under the precast concrete slab, and uses the principle of screw transmission to slowly raise or lower the lifting screw of the jack by rotating the operating rod. During the adjustment process, real-time monitoring of the levelness of the precast concrete slab is carried out using measuring tools such as a spirit level and a theodolite. When one side is found to be too high or too low, gradually correct the horizontal position by adjusting the height of the screw jack. This precise adjustment lays a solid foundation for subsequent welding or grouting work. If the horizontal position deviation is large, it will cause uneven welding seams during subsequent welding, affecting the connection strength of the structure; During grouting, it may cause insufficient compaction of the grout, reducing the overall integrity of the prefabricated components and the main structure.

In practical operation, to ensure the stable operation of the screw jack, the support surface must be solid and flat, avoiding the danger of the jack tilting or even collapsing during the lifting process. At the same time, the operators must strictly follow the operating procedures and slowly and evenly rotate the operating rod to prevent the precast concrete slab from shaking or adjusting its position excessively due to improper operation. Spiral jacks, with their easy operation and precise adjustment, have become indispensable assistants for the installation of prefabricated components on construction sites, effectively ensuring the construction quality and progress of the project.