| 摘要 |
<p>A tendon (100,200) for prestressed concrete structure includes a core member (1) such as a steel wire, a steel strand or a steel bar; and an unset bonding material (2) coating the core structure to a predetermined thickness, having a specific setting time determined by selectively determining the respective contents of the bonding material and which sets at an ordinary temperature by chemical reaction; and a seamless corrugated sheath (4) with a long span. The tendon (100,200) is manufactured continuously by coating a wire strand core member (1) with an unset bonding adhesive (2), melt extruding and shrinking a seamless plastic sheath (4) around the coated core member, deforming the plastic sheath (4) to a corrugated shape with the depth of an indented portion being deeper than the thickness of the plastic forming the sheath and cooling the tendon. The tendon (100,200) with a long span is wound on the reel for storage, paid off from the reel and cut to the predetermined length, and anchorages are attached to the end of each reel. The tendon is arranged in a desired arrangement for forming a prestressed concrete structure, concrete is placed so as to bury the tendons therein, and then the tendons are tensioned and fixed after the strength of the deposited concrete has increased to a degree to permit tensioning the tendons and before the unset bonding material sets. Thus, the unset bonding material (2) sets after the tendons (100,200) have been tensioned and bonds the tendons firmly to the prestressed concrete structure. <IMAGE></p> |
