초록 ▼

A method and apparatus for forming a hollow column of concrete on a floating offshore platform by applying successive layers of concrete and reinforcing to a single surface slipform which outlines the inner or outer contour of the column. The column is intermittently or continuously lowered by means

A method and apparatus for forming a hollow column of concrete on a floating offshore platform by applying successive layers of concrete and reinforcing to a single surface slipform which outlines the inner or outer contour of the column. The column is intermittently or continuously lowered by means of gravity under the control of one or more cables. The column may be round, oval, rectangular or of any cross section, or any combination thereof, and may be open or closed at either end or at intermediate levels. The column may be segmented into sections and have relatively thin walls as in an OTEC cold water pipe, an outfall sewer, or an underwater tunnel; and a method is described for safely deploying such columns at great depth on to an uneven seabed. The column may be monolithic with walls thick enough to support a structure above the surface or to maintain the hollow interior at amospheric pressure and provide access to an undersea habitat or to gas and oil well equipment. Air chambers with air lines leading to the surface may be placed at various levels on or within the wall to provide a means for adjusting the immersed weight of the column.

대표청구항 ▼

An apparatus for slipforming tubing offshore comprising in combination: means to support tubing extending from a single slipform, means for alternatively applying cementitious material and reinforcing on one side of the single said slipform to form said tubing, means to lower said tubing formed from

An apparatus for slipforming tubing offshore comprising in combination: means to support tubing extending from a single slipform, means for alternatively applying cementitious material and reinforcing on one side of the single said slipform to form said tubing, means to lower said tubing formed from said cementitious material and reinforcing into water, and means to protect uncured cementitious material from washing away in water.