What are the applications of prestressed technology in bridge engineering construction?

Select Strand:
In prestressed construction, the selection of steel strands is very important, and it is also an important way to increase prestress. Steel rods and cold-drawn wire are more common materials. The low-slack steel strand has obvious advantages. The performance of the steel strand is relatively ideal, the cost is low, and the appearance can better meet the individualized aesthetic needs of modern people. , so this material is widely used in bridge construction. Compared with other materials, if the prestressed steel strand is used for construction, the material consumption can be reduced, and it has a higher cost performance. In the process of selecting steel strand materials, the staff is required to attach great importance to performance parameters and various standards.
Steel strand processing:
After the tensioning construction, the prestressed tendons should be fixed, the surface of the steel strand at the fixed end should be cleaned in time, and the sundries and dust on the surface should be removed, and then the steel pipe and the anchor plate should be used to form a connection belt with concrete to ensure the stability of the prestressed tendons. After beam-threading construction, steel strands will gradually sag under the influence of gravity. The construction personnel needs to combine the stretching amount of the steel strand during the tension construction to determine the length of the adhesive tape and improve the uniformity of the adhesive force.

Tension construction:
Prestressed tension construction technology is mainly divided into prestressed tension and high-stress tension. In the construction of pre-tension tension, the problem of steel strand winding is more common. Pre-tension tension is to pull the steel strand before high-stress tension to ensure that the steel strand is in a vertical and smooth state. During the pre-tensioning construction, the two sides should be pressed symmetrically to ensure that the lengths of the steel strands on both sides are at the same height, and the tension should be strictly controlled to avoid problems such as the entanglement of the steel strands. After pretensioning and bending, it is necessary to carefully check the shape, position, specification, and other parameters of the internal components to avoid blockage of the prestressed tendon channel and improve the quality of concrete pouring construction. Furthermore, the quality and performance of construction tools and equipment must be strictly checked, and high-stress tension construction can only be carried out after meeting the requirements.