| 摘要 |
A three-dimensional constructional element (10) is shown having opposing and substantially planar panels (30, 40) mounted on opposing surfaces of a flexible planar member in the form of a flexible mesh material layer (52) therefore making a composite sheet of three layers. Panel (30) includes transverse grooves (12, 14) formed therein and panel (40) includes transvers e grooves (16, 18) formed therein. The structure is deformable about each groo ve (12, 14, 16, 18). In a preferred embodiment the panels (30, 40) are divided into many segments defined by the transverse grooves to allow the constructional element to be deformed so that one of the exterior surfaces o f panel (30) is concave while the opposing exterior surface of panel (40) is convex. Also disclosed herein is a method of forming a curved surface structure including the steps of deforming the constructional element (10) into a desired position and securing the element (10) into that position by introducing a grouting material (74, 94) thereonto so that the grounting material can enter the grooves (12, 14, 16, 18) to rigidly affix the element (10).
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