The Return of Deep Soil Mixing

by Donald A. Bruce, (M.ASCE), ECO Geosystems, Inc., Venetia, PA,

Serial Information: Civil Engineering—ASCE, 1996, Vol. 66, Issue 12, Pg. 44-46

Document Type: Feature article


Deep soil mixing, a technique originally developed in the U.S. in the 1970s but virtually ignored because for cost reasons, is regaining acceptance here due in large part to mechanical improvements made by Japanese firms. The topic was front-and-center at the Second International Conference on Ground Improvement Geosystems in Tokyo in 1996. The technique is being used in some major U.S. projects, such as the Central Artery in Boston. The story describes several major techniques like Deep Lime Mixing, Dry Jet Mixing and Cement Deep Mixing. Deep soil mixing involves large diameter, hallow stem, discontinuous flight augers to penetrate and mix soils.

Subject Headings: Soil mixing | Soil stabilization | Materials processing | Penetration tests | Project management | Lime | Flight

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