When calculating the theoretical elongation of prestressed tension, the distance between the anchorage points at both ends of the steel strand should be taken as the calculated length of the steel strand. However, in prestressed tension

The distance, plus the working length of the steel strand in the tensioning jack, is used as the calculated length of the theoretical elongation of the prestressed tensioning of the steel strand. In steel strand

Measurement, therefore, can only be used to measure the piston stroke of the tensioning jack to calculate the tensioning elongation value of the steel strand, but at the same time, the entire tensioning process of the steel strand should also be subtracted

The anchor plug shrinks back. The bearing capacity of steel strands should be 4-6 times the total traction force