Phase 2 of the Third Street Light Rail Project is currently underway, which includes the construction of the Chinatown Station, cavern, crossover and cross-cut caverns using the Sequential Excavation Method (SEM).
Expert Review Services:
Gall Zeidler Consultants provides expert design review services on the SEM tunneling for the Chinatown Station and associated SEM caverns, which includes review and recommendation of the following aspects of the work: construction staging, multiple drift excavation sequencing, structural design calculations, use of ground improvement measures for dewaterwing and grouting, settlement mitigation measures involving compensation grouting, structural design calculations, instrumentation and monitoring, waterproofing, contact packaging, and SEM specifications.