Abstract
The design criteria for an electric rail line servicing the center of downtown Portland, Oregon required ”boot” type rail insulation and a 10-ft separation between the track slab and paralleling waterlines. Crossing waterlines were isolated with casings or sleeves for a 10-ft distance from the track slab. Where there was not adequate clearance for the specified separation between the track slab and neighboring waterlines, there were compromises to Portland Water Bureau’s design standard and the track slab was additionally insulated with a secondary liner. This paper describes the design, construction, and field-testing of the track and waterlines.
Subject
Rail,
Water,
Materials,
Piping,
Rebar,
Waterline,
Slabs,
Repair,
Electric potential,
Stray current,
High density polyethylene,
Construction,
Damage
© 2008 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2008
Association for Materials Protection and Performance (AMPP)
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