Drilled Pier with Rock Socket Foundation System for WWU’s new buildings

For the most recent two major buildings on WWU (Western Washington University) campus, Student Recreational Center (~$26,000,000 construction value) and Communications Facility (~$40,000,000 construction value) buildings, more than 300 piers were installed for each building. The drilled pier with rock socket has capacity almost twice or three times higher than traditional piles ended on top of bedrock without penetration into bedrock. Therefore, significant savings have been realized for both of the project. The piers derive capacities from both friction and cohesion between the pier and the surround bedrock, while in the past, rock cohesion was not considered in design perhaps for no existing solution that includes the effect of cohesion.