950-974 Market St. Case Study-PPT Presentation

PPT Presentation

Pdf Summary

The 950 Market Street project in San Francisco is a 410,000-square-foot, 12-story mixed-use development planned to include 242 hotel rooms, 232 condominium units, and 13,000 square feet of retail space. Group i (L37 Partners, AGI Avant, and T. J. Reagan, Inc.) is the owner; LendLease is the construction manager, and Handel Architects is the architect. BART is a major stakeholder.<br /><br />Condon-Johnson & Associates (CJA) served as geotechnical subcontractor and designed the shoring, underpinning, and ground improvement. Its scope also included dewatering, mass excavation, and double-cased auger-cast-in-place (ACIP) piles. Langan, SGH, and Haley & Aldrich provided pile design and dewatering consulting, respectively.<br /><br />The shoring and underpinning work included approximately 26,000 square feet of shoring, 166 soldier beams, triple- and single-auger soil-mix elements, 24 slant piles and 24 jet-grout infill columns for underpinning, and 174 tiebacks. Additional work included soil nails and shotcrete, corner bracing, and vault bracing.<br /><br />Dewatering included 14 interior wells, three interior monitoring wells, four exterior recharge wells, and two exterior monitoring wells. The project also required 89 double-cased, 18-inch ACIP piles, tested for compression and tension, and 600 triple-auger soil-mix elements for ground improvement and bearing capacity. BART’s zone of influence and groundwater effects were important construction considerations.

Keywords

950 Market Street

San Francisco

mixed-use development

geotechnical subcontractor

shoring and underpinning

ground improvement

dewatering

ACIP piles

BART

LendLease