An in-ground swimming pool which utilizes a relatively flexible, continuous sheet-like wall member in combination with a bottom construction which is formed from polyurethane foam. The polyurethane foam bottom is reinforced at the surfaces of concave curvature with rail-like concrete members to which the foam is bonded. Also disclosed is a method of forming the polyurethane bottom which consists of applying a relatively thin coating of polyurethane foam to the bottom excavation and immediately placing a sheet of polyethylene, 2 to 4 mils thick, over the foam before the foam has set, conforming and adhering the polyethylene sheet to the foam and earth surface. The final steps include applying a series of polyurethane foam layers by spraying over the polyethylene sheet to achieve a desired thickness. By following the procedures disclosed, the foam surface can be controlled to obtain the desired pool bottom smoothness.
Elmer W. Rothrock - Hinsdale IL Clarence D. Miller - Naperville IL
Assignee:
Chicago Bridge & Iron Company - Oak Brook IL
International Classification:
B01F 304
US Classification:
261109
Abstract:
A cooling tower self-supporting vertical shell essentially circular in horizontal section and wider at the base than at the top, said shell comprising a series of courses set one above the other with each adjacent upper course supported by the course beneath it, most of the courses from at least near the bottom to the shell top portion constituting a frusto-conical shell with vertical flutes, and the diameter of the bottom of each course being about equal to the diameter of the top of the course beneath it.
A method of constructing a swimming pool which includes the steps of forming an excavation of desired size and shape in the ground, the excavation including a footing area, placing polyethylene film over the footing area and a portion of the remaining excavation surface, setting a wall member on the footing area, pouring a concrete footing on the footing area to embed a portion of the wall, applying a groove-forming device to the wall, pouring additional concrete to form the pool bottom, removing the groove-forming device to expose a groove, and filling the groove with caulking material. An alternative method of forming the pool bottom includes the steps of spraying layers of polyurethane foam on the excavation to form the pool bottom.