Solutions for prestressed concrete cylinder pipes

摘要

Evaluation of the condition of PCCP is a widespread concern for owners and managers. In recent years a number of catastrophic failures have occurred around the world. These failures cause interruption in service, damage to property and high repair costs. The general inaccessibility of the pipe and prestressing wire is the main problem that makes evaluation difficult, costly and often inconclusive. Random examination of prestressing wires by excavation or internal inspection of the pipe wall only gives a very localised knowledge of the prestressing. Three key technologies have been developed recently which can be applied to pipeline infrastructure globally. These will ensure that deterioration can be identified early and corrected before large-scale repairs are required, thereby reducing maintenance costs.