Ground Improvement at 24th & Harrison
24th and Harrison is a residential mixed-use project that has undergone a significant transformation. Located in the heart of Oakland’s Broadway Auto Row, this area is known for its historical connection to car dealerships and automotive services dating back to 1912.
Malcolm Drilling provided Ground Improvement services for a project that encompassed a 20-story mixed-use building and a 2-story, below-grade, 500-car parking garage. The excavation reached a depth of 20 feet below grade, with the site surrounded by existing structures and city streets. To safely achieve this depth, Malcolm designed a 24,000 square feet temporary shoring system, consisting of cantilever soldier piles, tie-backs, and secant piles with internal rakers. The 20-story structure imposed significantly high bearing pressure loads that the existing soil could not support. To address this, a ground improvement system was implemented beneath the mat foundation to withstand the load demands with minimal settlement. The ground improvement project involved the installation of over 2,300 rigid inclusions to depths of 40 feet.
