Equipment and instruments used for applying pre-stress should be operated and managed by designated personnel, and timely protection and calibration should be maintained. In adherence to time standards, the designated person in charge of tensioning on the construction side should participate in the calibration of readings.

Before tensioning, the dimensions, age, and strength of the concrete must meet the design requirements. If no design requirements are specified, the strength should not be less than 75% of the design strength grade. The concrete beneath and around the anchor pad plate must be compact; if there are no honeycombs or other defects, the treatment should be carried out immediately after demolding, and tensioning can only proceed after the treatment is complete.

2. The tensioning sequence of prestressed corrugated pipe prestressed steel should comply with the planning requirements. In the absence of planning requirements, batch-wise and staged symmetrical tensioning can be adopted. A jack capable of tensioning multiple steel strands or wires should be used to simultaneously apply stress to all prestressed steel strands within each bundle, except for not more than four steel strands in flat prestressed corrugated pipe.

When installing tensioning equipment, ensure that the tensioning effect line aligns with the axis of the prestressing tendons. Before installing anchorages and limiting plates, check the consistency of the hole positioning distribution. During installation, it is essential to ensure that each hole is centered and no misalignment occurs.

4. After prestressing tendons are tensioned and anchored, the remaining local sections should be cut off. The exposed length of the prestressing tendons after cutting should not be less than 30mm. Arc welding should not be used for cutting during the removal process.