The north tower at Adobe’s global headquarters in downtown San Jose consists of a two-level underground parking garage along with an 18 story building. We were hired for the temporary shoring and dewatering design and installation.

The 35,000 SF temporary shoring wall was installed utilizing our triple auger soil mixing equipment. The excavation averaged 30 ft with the water-table at 14 ft below grade.  The shoring wall was comprised of deep soil mixing, steel beams, tiebacks, and internal bracing. Some tiebacks had to be installed well below the water-table and underneath city streets as well as adjacent structures. We also installed 14 dewatering wells up to 45 ft deep and 10 depressurization wells up to 75 ft deep to maintain the groundwater level below the excavation. Automated backup pumps, as well as wireless monitoring equipment, were utilized to ensure the dewatering system maintained sufficient drawdown throughout all concrete work.

For more information on this project please contact Ryan Nagle –  rnagle@malcolmdrilling.com