Geotechnical Site Assessment for Port of Long Beach, Pier G Container Terminal Redevelopment Program

This paper highlights geotechnical site characterizations and developing of geotechnical recommendations related to the design and construction of the Pier G Container Terminal Redevelopment Program (Pier G Program) in the Port of Long Beach, California. The Pier G Program is designed to accommodate the next generation of large container ships, which have drafts of up to 16.7 meters, and will include renovation of the existing terminal space, increase in land use efficiency, and construction of a modern state-of-the-art expanded cargo storage facility. The overall Pier G Program includes the new wharf constructed offshore of the existing rock slopes on Berth G232 supported by 0.6 meters octagonal prestressed concrete piles up to 33.5 meters in length, a new improved backland area, installation of a new offshore fill, and design/construction of several new structures within the Pier G container shipping terminal that currently covers more than 1 square kilometer. Evaluation of the subsurface conditions at the site utilizing onshore and offshore drilling and sampling techniques, geotechnical analyses including settlement under static and seismic conditions, axial and lateral capacities of foundation systems, and geotechnical recommendations related to construction of various improvements and stabilization of subgrade soils near or below groundwater levels are discussed. Implementation of sustainable design practices including geotechnical considerations for construction below groundwater of Continuous Deflective Separation units within the storm drain system to improve the quality of Port of Long Beach water, reuse of soil and aggregate base materials, and recycling of pavement materials are also discussed.