Piling Adjacent to Rail Tunnels at King's Cross Central-Video

Video Transcription

Video Summary

The presentation describes piling for buildings S1 and S3 at London’s King’s Cross Central, where foundations were installed close to live Network Rail tunnels. The team designed and built CFA and rotary bored piles in London Clay and the Lambeth Group, adapting the S3 design after discovering unexpected water-bearing sand. Rather than use support fluid throughout, they conducted a preliminary load test; its settlement was below predictions, supporting the revised approach. Pile installation and tunnel monitoring were carefully controlled, and measured tunnel movements remained within predicted limits. The speaker highlights thorough site investigation, planning and collaboration as key to the projects’ success.

Keywords

piling

King's Cross Central

Network Rail tunnels

CFA and rotary bored piles

London Clay