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Innovative method for assessment of underground sewer pipe condition.pdf

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Innovative method for assessment of underground sewer pipe condition

/locate/autconAutomation in ConstructioInnovative method for assessment of underground sewer pipe condition Dae-Hyun Koo a,*, Samuel T. Ariaratnam b aDepartment of Civil and Environmental Engineering, Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, United States bDel E. Webb School of Construction, Ira A. Fulton School of Engineering, Arizona State University, Tempe, AZ, United StatesAbstract The accurate evaluation of current underground infrastructure must be done before any crucial decisions regarding lifecycle analysis, rehabilitation and replacement intervals and appropriate remedial methods can be made. Unfortunately, traditional technologies and management approaches have been limited by the use of insufficient data in the evaluation of the structural integrity of an aged infrastructure. This paper describes an innovative method for assessment of underground pipe, utilizing Ground Penetrating Radar (GPR) and Digital Scanning and Evaluation Technology (DSET) to collect accurate information about the condition of a buried pipeline. Prediction modeling, using logistic regression, to measure the extent of deterioration of the infrastructure system, is described. A case study applying this innovative technology to sections of large diameter PVC lined concrete pipe in the City of Phoenix, Arizona, is presented. D 2006 Elsevier B.V. All rights reserved.Keywords: Underground infrastructure; Utility inspection; Evaluation; Lifecycle prediction modeling1. Introduction The importance and role of underground infrastructure cannot be underestimated, especially in populated and congested urban areas. The most basic resources for sustaining urban life, including water, wastewater, commu- nication and power, are distributed or collected through a network of underground infrastructure. This underground network has been largely ignored, mostly due to the fact that it is invisible and not readily seen by the general public. Recently, the deterioration