Northshore Outfall Tunnel Consolidation Contract

 

 

Facility Type
Waterworks
Location
San Francisco, CA
Start Date
08/1979
End Date
08/1982

 

 

PROJECT DESCRIPTION

Contract N-1: 12' bore, 9' id X 4,152' wet, mixed face sewer tunnel, excavated with open face shield and roadheader-type excavator. Primary support with steel rings & wood lagging; cast-in-place lining.  Shaft 20' sq X 50' deep in sand; support by sheet piles, then CIP liner. Soil is Bay Mud, under Fishermans Wharf.

 

Contract N-2: 12' bore, 9' id X 3,350' wet, soft ground sewer tunnel excavated with an earth pressure balance (EPB) shield. Primary support with gasketed steel plate, final lining cast-in-place concrete.  Shaft lined with sheet piling, final lining cast-in-place. Soil is Bay Mud. Alignment is under Fishermans Wharf.

 

 

 

 

OTHER PROJECT ( ALL PROJECTS)