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http://dx.doi.org/10.7843/kgs.2011.27.9.005

A Study on Alternative Backfill Material for Pre-insulated Pipe through the Laboratory Tests  

Choi, Bong-Hyuck (Dept. of Civil Engrg., Hanyang Univ.)
Kim, Jin-Man (Geotechnical Engrg. & Tunnelling Research Division, Korea Institute of Construction Technology)
Yoo, Han-Kyu (Dept. of Civil and Environmental Engrg., Hanyang Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.9, 2011 , pp. 5-11 More about this Journal
Abstract
This paper recommends the alternative back-fill material for the pre-insulated pipe based on the results of tests performed using different kinds of backfill material. In this study, laboratory tests were preformed to determine the behavior of the pre-insulated pipe caused by variation on grain size distribution, friction characteristics and earth pressure characteristics of different types of backfill material. Two types of natural sand (fine-grained and coarse-grained sand) and crushed sand, and two types of gravel (10mm, 20mm) were used as backfill material in the laboratory tests. The laboratory test results were analyzed and compared with the pre-insulated pipe backfilled with the standard medium-grained sand. Based on the evaluation and comparison of laboratory test results, it was determined that crushed sand is the most suitable back-fill material that can be used as an alternative for medium grained sand for pre-insulated pipes.
Keywords
Back-fill material; Earth-pressure; Friction characteristics; Pre-insulated pipe;
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