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Jet Grouting: Snail's Pace of Adoption

by Kenneth B. Andromalos, Engr.; Geo Con Inc., Pittsburgh, PA,
Paul J. Pettit, Manager of Soil Services; Halliburton Industrial Services, Houston, TX,


Serial Information: Civil Engineering—ASCE, 1986, Vol. 56, Issue 12, Pg. 40-43


Document Type: Feature article

Abstract:

Jet grouting is grouting of soil, but the process, the equipment and the subsurface product are different from the familiar ones. Here the cement grouting is mixed in situ with the surrounding soil, and a cylindrical column of the mixture, called soilcrete, is formed. An alternative approach displaces all of the soil, creating a conventional concrete cylinder. Chief uses include underpinning existing structures, providing seepage control, making cofferdams, and limiting subsidence over tunnel excavation sites. This article describes some applications, advantages and limitations. Two case histories, of a test project at the site of the New Waddell Dam in Arizona, and a cylindrical shaft for a lift station near New Orleans, are presented. Case histories of three European jobs�in the Milan, Italy, subway, in repairing washed-out piers on a railroad bridge north of Rome, Italy, and in underpinning a basement in Munich, West Germany�illustrate more extensive use.

Subject Headings: Soil grouting | Case studies | Jet grouting | Underpinning | Soil mixing | Soil cement | Railroad bridges

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