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Shoring Operations Underway at Sutter Health’s Advanced Neuroscience Complex
Boldt is initiating the shoring and foundation phase for the Advanced Neuroscience Complex at Mission Bernal (MBCC) in San Francisco, a critical milestone in the construction sequence. This work is being executed adjacent to the operational OSHPD 1 acute care facility, Sutter MBC, which Boldt originally delivered in 2017. The proximity to this high-sensitivity healthcare environment necessitates exceptional precision in all geotechnical and structural operations.
The shoring system is designed to stabilize the excavation site and mitigate soil displacement, analogous to prevent collapse in an unsupported sand excavation. This system is essential for maintaining structural integrity during deep foundation work and protecting adjacent infrastructure.
Approximately 50% of the shoring scope falls under OSHPD 1 regulatory oversight due to its direct interface with the existing hospital, requiring adherence to the most stringent seismic and safety standards. The remaining scope is governed by OSHPD 3 requirements.
The site’s geotechnical profile presents additional complexity. It is located above an active subterranean creek and within a high seismic risk zone. Groundwater intrusion is anticipated upon pile drilling, necessitating robust dewatering strategies and continuous coordination among all trade partners.
The engineered shoring solution includes:
- Drilling deep foundation piles
- Installing a rebar-reinforced retention system
- Applying shotcrete to form a permanent 60-foot-deep retaining wall
This wall will serve as the structural perimeter for a four-level subterranean parking garage and the base for the five-story neuroscience facility above. The shoring and excavation phase will take roughly nine months to complete. The team is targeting completion ahead of the rainy season to mitigate weather-related delays.
Upon completion of shoring, construction will transition to the concrete below-grade parking structure, bringing the project back to street level.
About The Boldt Company
The Boldt Company (Boldt) is a leading professional construction services firm with customers across the United States and is a subsidiary of The Boldt Group. Founded in 1889, Boldt is a fourth-generation family and employee-owned firm headquartered in Appleton, Wisconsin. Boldt is recognized as a pioneer in Lean construction and in the industrialized construction space. Boldt operates 18 offices across the U.S. that serve customers in healthcare, power, industrial, education, automotive and commercial markets.
