Agust Agustsson - Redondo Beach CA Richard A. Wallers - Balboa Island CA Tomas H. Agustsson - Rolling Hills Estates CA
Assignee:
Groundtech, Inc. - Redondo Beach CA
International Classification:
E21D 1110
US Classification:
405133
Abstract:
An underground work chamber assembly including a chamber, elevator shaft, air path, utility path, and slotted grout pipes which is assembled as lowered into a drilled hole on dry land or underwater, the slotted grout pipes facilitating a controlled grouting of the space surrounding the underground work chamber assembly when in place.
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