High Performance Fabric In Old Piping: Quick, Durable Restoration Of Operational Safety

By Andreas Hüttemann, Qualified Engineer Director, R&D/Quality Management, Karl Weiss Technologies and Brian Mattson, Business Development Manager, GTI | December 2009 Vol. 64 No. 12
Fig. 6 Woven fabric reversion of pit three toward pit one with a length of 994 feet.

In comparison to open construction, the proportion of earthworks for woven fabric relining still only amounts to approximately three percent. This is equivalent to a possible direct saving of approximately 97 percent for CO2 emissions generated by ground transport carried out by a lorry. Depending on the constraints of this example, this may correspond to a reduction of up to 33,000 pounds of CO2. Overall, based on a comparative analysis, there is an approximately 260 percent higher CO2 rate with open construction. In absolute value, a saving of approximately 62,000 pounds CO2 can be estimated on this project alone.

For the woven fabric relining, it is a great example of a win-win situation. However, while woven fabric relining represented the best solution on this building site. Other procedures under different operating conditions offer rehabilitation possibilities that are equally effective. Over the past years, the “Trenchless Construction” work group at DVGW has developed the corresponding Technical Rules (table 2).

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