TRC provided geotechnical services for this design-build project that was undertaken for the San Mateo County Community College District. The project consisted of a new two-story north wing and a new three-story south wing utilizing an open steel building frame structure with concrete-filled metal deck. The new facilities encompass a building footprint of approximately 28,482 square feet and required cuts of up to 18 feet for the west side of the building. Portions of the north and western walls also act as retaining walls.
A geologic hazards evaluation was performed in accordance with the California Geological Survey (CGS) Note 48. The site is located ½-mile from the San Andreas fault; therefore, a ground motion analysis was required by the 2007 California Building Code.
TRC’s geotechnical investigation and geologic hazards evaluation was reviewed and approved by CGS and the Division of the State Architect. TRC also worked with the structural engineer to reduce static and seismic earth pressures on building retaining walls through the use of light-weight volcanic backfill.
Additional services involved the development of earthwork guidelines, foundation and pavement recommendations, plan review for conformance with geotechnical recommendations, and on-going construction observation and testing services for earthwork and foundations.
Contact TRC today for more information about our services or this project.