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Amazon Project Piper

Deep Soil Mixing | Load Transfer Platform

Troutdale, Oregon

Project Description

Tilt-up construction of an 855K sq-ft warehouse. AGI designed a solution consisting of over 4,400 Deep Soil Mixing columns up to 70 feet deep with a 3-foot-thick load transfer platform to support the floor slab. AGI-Fudo, JV constructed the columns in 4 months working double shifts with 4 drill rigs and 3 batch plants.

Application

  • Provide improved bearing capacity
  • Uniform slab support with increased modulus of subgrade reaction
  • Mitigate liquefaction settlement
  • Limit static settlement

Geotechnical Conditions

  • Artificial fill and organics
  • Soft silts and clays to 30’
  • Loose, liquefiable sands to 60’

Project Info:

  • Design-Build Contractor: Advanced Geosolutions Inc (AGI) [AGI-Fudo, JV]
  • Developer (Tenant): Trammell Crow Company (Amazon.com Inc)
  • General Contractor: Sierra Construction Company, Inc.
  • Geotechnical Engineer: GeoDesign, Inc.

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