One Dock Street: A Multi-Scope Geotechnical Challenge in the Heart of Philadelphia-Video

Video Transcription

Video Summary

The presentation covered One Dock Street, a 31-story tower built on a tight site in Philadelphia’s historic Society Hill. Keller completed auger-cast piles, soldier-pile excavation support, and underpinning. The piles extended through urban fill, organic Dock Creek deposits, Trenton gravels, and weathered schist; load testing helped verify their design. Limited access required careful coordination of equipment and deliveries. Underpinning plans changed after a timber pile was discovered and conditions differed from the existing drawings, leading to a combined soil-nail, shotcrete, and pile-support solution. Groundwater and heavy rain also posed construction challenges.

Keywords

One Dock Street

Philadelphia

auger-cast piles

underpinning

soil-nail shotcrete