| 摘要 |
600688 A tower comprising a hollow column (10) is disclosed. Pre-assembled pre-stressing cables (15) extend along the internal space of the column to enhance the strength of the hollow column. The pre-stressing cables comprise tendons (1) which terminate at cable terminations (20). The cable terminations bear against abutment portions (25) at upper and lower parts of the column. Each tendon is contained in a respective jacket with a protective substance. Each cable termination comprises a block (see 30, figure 3) for anchoring each tendon of a pre-stressing cable, a chamber (see 31, figure 3) filled with a protective substance, such as grease or wax, on a rear side of the block and a sealing system (see 32, figure 3) closing the chamber opposite the block. Each tendon of the pre-stressing cable extends through the sealing system and has its jacket interrupted in the chamber. The provision of a protective substance in the chamber is advantageous in that it protects the exposed tendons from corrosion during large temperature variations. A method of building a tower is also disclosed. |
