AWWA ACE65239

Much of the nation's drinking water lines are past their intended design lives and are indire need of rehabilitation or replacement. The 1995 Infrastructure Report Card by the American Societyof Civil Engineers scored the drinking water system in the United States a failing grade of D-. Tocompound this situation, increased urban growth has placed greater demand on existing systems, many ofwhich do not have the capacity to meet this increased demand. With one eye on minimizing socialimpacts and another on tighter budgetary constraints, municipal engineers have begun to turn totrenchless technologies to address drinking water infrastructure issues. In particular, HorizontalDirectional Drilling (HDD) and trenchless pipe replacement (or pipe bursting) are methods that arerapidly gaining acceptance as alternatives to traditional open-trenching for installing new and replacingdeteriorated distribution systems. HDD is used for installing new water lines, while pipe burstinginvolves the replacement of deteriorated (or under capacity) lines with a new pipe of equal or largerdiameter. This paper briefly describes each of these two trenchless methods and provides several casehistories of their successful utilization in drinking water applications. Additionally, available and suitablepipe materials using trenchless methods are discussed. Includes 13 references, figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2007

Number of Pages:

75

File Size:

1 file , 4.5 MB