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Design and Supply of a SHM Based Condition Assessment of Critical Structures System Using the Techniques of Corrosion and Stray Current Monitoring on the Cityringen Metro Project in Copenhagen

T. GOODERHAM, G. JOHN, S. VILES, B. STIPAC

Abstract


A condition monitoring system for corrosion and stray current is being supplied and installed into the new Metro line in Copenhagen, known as the Cityringen project. The objective is to provide a combination of: 1. Pre-warning system for corrosion within the concrete cover to identify the onset of corrosion at reinforcement depth using a number of anode ladder sensors and ER (Electrical Resistance) sensors. 2. To understand the areas of stray current flow through the tunnel and station walls using sense electrode sensors. The data will be used to refine uncertainties and assumptions in service life model predictions of concrete durabilities that had been developed prior to the structure design (Jensen, 2012). This paper describes implementation of the monitoring system and the design consideration/philosophy used to determine measurement location throughout the system and the challenges presented.

doi: 10.12783/SHM2015/136


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