Substrate Modification and Magnetic Water Treatment on the Maintenance of Tunnel Drainage Systems. I: Feasibility Tests
Publication: Journal of Performance of Constructed Facilities
Volume 29, Issue 3
Abstract
Calcium carbonate deposits are known to clog tunnel drainage systems and clogging is a major concern to tunnel operators worldwide. After analyzing several industrial solutions for treating calcium carbonate, experiments were conducted to evaluate the use of substrate modification and magnetic fields in inhibiting calcium carbonate deposition. For substrate modification tests, laboratory experiments showed the least amount of deposits on polytetrafluoroethylene and polydimethylsiloxane coatings, while polyvinyl chloride (PVC) pipes showed the most. Simulated tunnel drainage test results showed PVC pipes inclined at large gradients and PVC pipes with installed magnets to have slightly less calcite deposits than PVC pipes without magnets. The amount of deposits suggested the influence of magnetic fields to be minor and secondary relative to water velocity.
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Acknowledgments
This work was financially supported by the Seoul R&BD Program (No. ST100052). Special thanks go to Jonghwi Lee, Ikchan Ju, Jungwu Nam, Eunhyeong Park, and Saehwan Yun for their help in conducting experiments and communications.
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 3 • June 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 21, 2013
Accepted: Dec 26, 2013
Published online: Aug 12, 2014
Discussion open until: Jan 12, 2015
Published in print: Jun 1, 2015
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