Design and Supply of a Condition Monitoring System for Corrosion and Stray Current Monitoring on the Cityringen Metro Project in Copenhagen.

摘要

A condition monitoring system for corrosion and stray current monitoring is being supplied and installed into the new metro line in Copenhagen known as the Cityringen project.The objective of the system is to provide a combination of:1. Pre-warning system for corrosion occurring within the concrete cover so as to spot the onset of corrosion at reinforcement depth using a number of anode ladder sensors and electrical resistance (ER) sensors.2. To understand the areas of stray current flow through the tunnel and station walls through the use of sense electrode sensors.The data will be used to refine the uncertainties and assumptions in service life model predictions of concrete durabilities developed prior to the structure design This paper describes the implementation of the monitoring system and the design consideration/ philosophy used when determining measurement location throughout the system and the challenges presented and overcome.