Publish and Present
The San Francisco Fire Department is acquiring a new floating fire station. A new pile-supported pier structure will connect to the fire station with an access ramp. The new pier piles will extend down through the existing 100+ year old seawall rock embankment, through a weak and thin, 10 ft (3 m), layer of weak bay mud below the embankment, into a stiffer alluvial layer and bedrock below.
This paper discusses methods and findings for this project, including challenges encountered and suggestions for future projects. Topics include:
Soil dynamic shear strength obtained from testing
Estimated seawall seismic movement
Comments on ASCE design requirements
Methods and findings for evaluating the pile pinning strength
Seawall bulkhead arching across the site due to adjacent larger seawall movements