Phase 2 of the Central Subway – Third Street Light Rail Project includes the construction of the Chinatown Station platform, crossover and cross-cut caverns using the Sequential Excavation Method (SEM).
Expert Review Services and Site Supervision:
Gall Zeidler Consultants (GZ) provided SEM expert design review services for Chinatown Station and associated SEM caverns. The work included design review and recommendation of the design, multiple drift excavation sequencing, structural design calculations, ground improvement measures, dewatering and grouting, settlement mitigation measures, compensation grouting, instrumentation and monitoring, waterproofing, construction planning and staging, contract packaging, and SEM specifications. During construction GZ provided site supervision services. The project won project of the year award by ITA in 2020 for projects between € 50M and € 500M. It is in operation since January 2023.