| 摘要 |
<p>Method and apparatus for the manufacture of a concrete hollow slab by means of slide-casting. According to the method, the cavities are formed around tubes (13) of flexible material into which a pressurized medium, particularly water (15), is fed. The apparatus comprises a stationary base (1 to 4) and a casting device (7 to 11) arranged to travel in the longitudinal direction of the base (1 to 4). A number of parallel shaping pipes (10) forming part of the travelling casting device (7 to 11) and having a cross-section corresponding to the desired cross-section of the cavities to be formed are open at both ends. The flexible tubes (13), which are fastened at their rear ends to a pressurized liquid source (14), pass during the casting process from reels (12) in the casting device through the pipes (10) so as to give the cavities their final form.</p> |
