Lateral Load Response of a Reaction Column-Foundation System in Different Temperature Conditions

摘要

Temperatures below freezing experienced in several parts of the world increase strength and stiffness of soil, concrete and reinforcing steel. These changes can affect the lateral load behavior of deep foundations markedly. Large-scale outdoor lateral load tests were conducted during summer (at 23°C) and winter (-6°C and -10°C) on bridge column-drilled shaft foundation systems which were installed in glacial till soil classified as low plastic clay. The soil at the test site was characterized using laboratory tests performed at different temperatures and in-situ Cone Penetration Tests and Pressuremeter Tests. The column-foundation units were subjected to cyclic lateral loads and the force-displacement response and strain profile along the length of these units were monitored. This paper summarizes the measured lateral load responses of the reaction column-foundation system.