Roto-sonic Geotechnical Boring

The Troutdale Formation is an alluvial sand and gravel deposit, characterized by cemented gravels, cobbles and Volkswagen-sized boulders. In order to penetrate this difficult formation for collection of geotechnical soil samples, MDE mobilized one of their seven Geoprobe® 8140 roto-sonic track rigs to complete this work.

Recently, MDE was selected to participate in a geotechnical subsurface investigation consisting of mud rotary borings, CPT advancement, and one roto-sonic boring in support of a geotechnical engineering assessment and design for a new regional transportation bridge in Portland, Oregon, U.S.A.