Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Reexamination Certificate
2005-04-05
2005-04-05
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
C405S284000
Reexamination Certificate
active
06874975
ABSTRACT:
A soil reinforced retaining wall for an earthen embankment is formed by screwing nails into the embankment at spaced intervals. The nails have helical threads extending therearound of such proportion and pitch as to screw into the formation as the nails are driven into place with a vibratory hammer, without prior boring of the embankment to accommodate the nails, or the necessity of cementing the nails into place. The wall is constructed from the top down and face panels are progressively assembled over the embankment and secured in place by the nails. In a preferred embodiment the nails have an elongate tubular body of a polyhedral cross-section and the threads are formed by twisting the body about its longitudinal axis.
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Aziz Enayat S.
Hilfiker William B.
Hilfiker Pipe Company
Lagman Frederick L.
Thelen Reid & Priest LLP
Uilkema John K.
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