Patent GB-780176-A (GB)
Title: Storage containers and a method of constructing the same
IPC: E04H7/28
Filed: 1955-01-21
Abstract: 780,176. Storage or silo buildings. HEIDENSTAM, E. J. VON. Jan. 21, 1955 [Jan. 22, 1954], No. 1932/55. Class 20(1) A (concrete) silo is cast in the form of an intercellular structure of large storage cells a, b, or of individual cells assembled together the walls of which are strengthened by tensioned metal bands &c. wound round the complete structure. In Fig. 8 pre-cast abutting cells a and b without reinforcement of the internal walls are assembled and spaced by intermediate secondary cells 4 and all are surrounded by a ring of outer cells 2 with stressing bands wound round. The concrete of the silo is added as upward sliding plate moulds are positioned after each pouring. The cell walls 3 however may have prestressed beams 5, Fig. 9, as reinforcement. The individual cells, however, may be prefabricated and then .assembled to form the silo. When smaller storing units are desired a large hexagonal cell may be subdivided by internal walls into three or six smaller units. The surrounding enclosing walls 2 may be made of prefabricated prestressed slabs so mounted to compress the inside adjacent walls. The reinforcement can be thin wires wound round or a small number of strong hoops may be used. The central cell I. Fig. 10, may be used as a lift shaft or for stairs, the silo being connected to a building 6 for receiving, treating and unloading cereals at the silo. Other arrangements of buildigs 6 &c. are in Figs. 11 and 12 (not shown). In Fig. 10 the cells I and II are first built up and surrounded with strengthening horizontal reinforcement. Then cells III are added and surrounded by similar reinforcement. The surrounding enclosing wall slabs 2 are added with surrounding reinforcement. Fig. 13 shows one cell with corrugated vertical walls 3 partly filled with filling 8. Such walls are cast in situ or prefabricated. Fig. 14 shows a vertical section of a prefabricated wall 9 of a cell of wave shape of pitch equal to the height of the cell. In horizontal section the wall may be straight sided or curved. In Fig. 21, where three internal walls 9 have to be joined as in the structure of Fig. 10, flanged moulds 17 are bolted together, the central space so formed being then filled with concrete to make a pillar. Alternatively other mould portions 17a may be used provided with handles 200 for sliding them up as casting proceeds. Shapes of vertically corrugated cell walls are in Figs. 14, 18 and 19 (all not shown). Where a number of composite silos.100, Fig. 24 are assembled together, transverse walls 20, Fig. 25 are added, such walls 20 being provided with pre-stressed reinforcement 21 anchored to a vertical beam 24 by bent plates 25. The silo in Figs. 27 and 28 is provided with top rotatable grain distributing tubes to fill each cell. There are external support pillars 27 and the central cell is provided with a grain elevator 28 and stairs 29 to which access from the incorporated premises 31 is obtained by a passageway 32. A lift 30 is also provided. The outside wall of a complete silo may alternatively be made of pre-stressed sheet iron. In some cases the concrete may be prestressed by casting the silo walls in concrete containing swelling cement. In Fig. 32 projecting outer walls 49 of cells may have holes to receive tension bands of wire rope &c. tightened by a bolt and nut. Such wire rope may optionally be covered in with thin cell' walls e.g. of sheet aluminium (50. Figs. 33 and 34, not shown). The surrounding metal bands may be stressed by nuts at the end of the bar reinforcement or by pressure jacks to press out part of an internal radial wall 3 from its inner part (Figs. 40 and 42, not shown).