| 摘要 |
The present invention relates to a method of manufacturing shell-shaped constructions, preferably of concrete, such as houses, ships' hulls, etc. According to the invention two flexible sheaths are arranged, an upper sheath outside a lower sheath, with a space (3) between them (1, 4) into which powder material is filled. Both sheaths are attached to a support surface or to the ground (2), after which pressure medium such as air is blown in between the support surface/ground (2) and the lower sheath/membrane (1), so that the sheath/membrane construction is inflated to the desired shape (9), after which the space (3) between the sheaths/membranes is evacuated with the aid of a vacuum pump (6), and the powder is thereafter compacted to rigidity, after which concrete, such as fibre-reinforced concrete, is sprayed onto the exterior of the upper sheath/membrane (4) and when the concrete has set/solidified the pressure medium in the lower space (7) is released and air is allowed to enter the space (3). |
