AGS developed innovative and cost-effective solutions for the foundation support of the various facilities.
Client:
San Francisco Department of Public Works
Location:
San Francisco, CA
The project, also known as Islais Creek Pump Station and Southeast Water Pollution Control Plant Improvement, involved construction of a 60-foot-deep pump station, a 10-foot-diameter tunnel in soft ground, a new headworks and influent control structure, two 12 X 13 foot chlorine contact channels, a 10-foot-diameter by 1,900-foot long effluent line, a 90-inch diameter wet weather transport line, and junction/connection structures, among other facilities. The majority of the structures were supported on piles bearing in dense sand layers below the soft bay mud.
AGS performed a geotechnical study and assisted the city in structural design and construction administration. Soil-structure interaction analyses were performed to evaluate actual static and seismic pressure distribution on various structures. The structures engineering work included preparation of construction drawings and specifications. The construction administration included responses to RFI, shop drawing review and special inspections. In addition, AGS performed geotechnical construction monitoring and provided geotechnical consultation during construction of the project.