Helical Piles: Reinforcement of Broken Foundations After Five Years of Installation-Video

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Video Summary

The presentation describes an assessment and rehabilitation project for guy anchors supporting a major transmission line across a remote, dry region of northeastern Brazil. After repeated tower and foundation failures, the owner commissioned an investigation to identify risks and prioritize repairs while keeping the line operational.<br /><br />Field inspections, geotechnical analyses, boring logs, laboratory tests, and torque measurements revealed significant anchor movement and inadequate safety factors. Although the piles were structurally sound, many had insufficient embedment or capacity. The soil was identified as collapsible, and failures had occurred during the wet season.<br /><br />The team ranked foundations by criticality and designed a reinforcement using additional helical piles connected through a transition beam. Temporary load reduction helped maintain stability during installation. Software analyses and load tests verified the design and improved safety factors. The project also included installer training and new procedures to promote correct helical-pile design and installation.

Keywords

guy anchors

transmission line rehabilitation

helical piles

foundation failure assessment

soil stability