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AssigneeAnderson Technology Corporation
InventorsTsutomu Kadotani, Yasuo Inokuma, Norio Terada, Hideaki Sakai, Toshikazu Minami, Jun Yamazaki, Yoshitaka Nishida
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A joint made between prestressing strands with a prestressing strand coupler is covered with a transparent coupler sheath having a retarded-hardening resin filling material injection opening and discharge opening provided in a tube wall thereof, and a resin filling material is injected into the transparent coupler sheath from the injection opening to fill the coupler sheath with the filling material. Thereafter, the whole outer peripheral portion of the prestressing strand joint, including the coupler sheath, is embedded with placed concrete. Tension is applied to the prestressing strands after the concrete has hardened and before the resin filling material hardens, thereby completing an excellent prestressing strand joint structure. According to the present invention, the filling condition of the resin filling material in the coupler sheath around the prestressing strand joint can readily be confirmed by visual observation. Therefore, the operation of filling the filling material can be carried out completely. Further, the wedges present in the prestressing strand coupler are allowed to properly bite into the prestressing strands in response to the prestressing strand tensioning operation performed before the filling material hardens. Thus, a superior joint structure is provided.
A prestressing strand joint structure comprising:
A method of constructing a prestressing strand joint, said method comprising the steps of:
A method of constructing a prestressing strand joint, said method comprising the steps of:
Dependencies are inferred from the claim text.