Looking into the Void: Condition Assessment with Pipe Penetrating Radar

Pipe penetrating radar (PPR) is the application of high-frequency electromagnetic waves to measure the condition of non-ferrous pipes. High resolution antennae allow for early detection of voids developing outside the pipe wall, before they grow to a problematic size or become sinkholes. PPR surveys are conducted from within the pipe. The antennae are normally carried by a remotely-operated crawler. This paper will look at recent advancements in PPR technology through a recent case study, and demonstrate how quantitative data can aid asset owners in making critical decisions about their pipes. The case study demonstrates how PPR was used to assess the condition of a critical sewer main in Surrey, British Columbia, Canada. Data from the PPR survey gave the owners confidence in their decision making, and provided the basis for cost-effective rehabilitation planning.