Asian Counseling and Referral Service - Counseling Center
A subsurface exploration was required for the construction of a four-story building with underground parking in the Seattle area. The site is an Environmentally Critical Area due to steep slopes. Our explorations found undocumented fill material that extended to the elevation of the planned underground parking garage. Our geotechnical engineers provided recommendations for design and construction of three types of shoring walls, soldier pile walls, masonry block walls, and rockeries.
Construction challenges included heavy groundwater seepage in excavation cuts and extremely moisture sensitive soils at the base of the building excavation. We provided recommendations for drains to intercept seepage, which was much more economical than the dewatering system that was also considered.
Services provided: Geotechnical Engineering, Subsurface Investigations, Hydrogeologic Investigations, Shoring and Drainage Design