No-dig methods an enabling factor to tackle renovation debt of critical water infrastructure

Abstract

Renovation debt of water supply and wastewater networks drives Oulu Waterworks to develop effective construction methods and increase investment volumes. The use of no-dig methods so far, have covered a minority of all Oulu Waterworks’ network building projects but were typically greater in scale and monetary value. Implementing no-dig methods reliably and justifiably to be the first choice of operation was needed and the demand led to the creation of a research-oriented thesis also offering a practical point of view. The main goal of the thesis was to justifiably present an increase in renovation investment volumes of water supply and wastewater networks that are outside the scope of joint-projects and traditional open-cut construction methods. Thesis background, results and future recommendations are presented.