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Field Testing of Pipeline Trench Backfill Properties Placed during Winter Conditions

Rodney McAffee, Ryan Phillips, Michael Martens

In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical Conference

Session: Cold Regions Geotechnics

ABSTRACT: The soil-structure interaction of a high temperature pipeline and the backfill materials being constructed in the winter is being evaluated. The objective was to better understand the engineering properties of the backfill material placed around a pipeline when subjected to cyclic thermal loading. Field tests were carried out to measure the stiffness of backfill materials within the trench. The temperature of the material when stockpiled was monitored before being placed back into the excavation. In addition, backfilling procedures were followed to avoid the placement of any frozen material. A similar testing program was completed in the summer where both fifreshfl backfill materials and native undisturbed soils were tested at the same location. Overall, the test results show a significant reduction in the strength and stiffness of the backfill materials when compared to the native undisturbed soils.

RÉSUMÉ: La réponse du sol lors de la construction hivernale d™un pipeline à haute température est évaluée. L'objectif est de mieux comprendre les propriétés d™ingénierie du matériau de remblai placé autour du pipeline lorsqu™il est soumis à un chargement cyclique. Des essais sur le terrain ont été menés afin de mesurer la rigidité des matériaux de remblai composant la tranchée. La température du matériau mis de côté a été mesurée avant que ce dernier ne soit placé à nouveau dans l'excavation. Aussi, des procédures de remblayage ont été suivies afin d™éviter que des matériaux gelés ne soit utilisés dans le remblai. Un programme semblable a été effectué au cours de l'été durant lequel des matériaux de remblais ‚frais™ et des matériaux de remblais non perturbées ont été testés au même emplacement. Globalement, les résultats démontrent une réduction significative de la résistance et de la rigidité des matériaux de remblai comparativement aux sols non perturbés.

Please include this code when submitting a data update: GEO2014_391

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Cite this article:
Rodney McAffee; Ryan Phillips ; Michael Martens (2014) Field Testing of Pipeline Trench Backfill Properties Placed during Winter Conditions in GEO2014. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoRegina14Paper391, author = Rodney McAffee; Ryan Phillips ; Michael Martens,
title = Field Testing of Pipeline Trench Backfill Properties Placed during Winter Conditions,
year = 2014
}