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公开(公告)号:US10815664B2
公开(公告)日:2020-10-27
申请号:US15542332
申请日:2016-01-05
发明人: Masashi Oikawa , Masato Yamada , Yoshiyuki Matsubara , Shinji Nakaue , Toru Yamamoto , Shinichi Yamanobe , Michio Imai , Naoki Sogabe , Kazumasa Okubo , Kazuyoshi Chikiri , Toshiyuki Kobayashi
摘要: A coated PC steel stranded cable includes: a stranded cable in which a plurality of elemental wires each composed of steel are twisted together; an anti-corrosive coating having an outer circumferential portion that coats an outer circumference of the stranded cable; an outer coating that coats an outer circumference of the anti-corrosive coating; and an optical fiber provided at a position inwardly of an outer circumferential surface of the outer coating and corresponding to a strand groove in the stranded cable so as to follow expansion and contraction of the stranded cable.
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公开(公告)号:US11001978B2
公开(公告)日:2021-05-11
申请号:US16627874
申请日:2018-02-26
IPC分类号: E01D19/12 , E01D101/26
摘要: A concrete structure includes a first concrete member, a second concrete member, a sheath that is disposed in a through hole extending from the first concrete member to the second concrete member, a tension part that is inserted over the entire length of the sheath and that is subjected to a tensile force, a fixing tool that fixes the tension part to the first concrete member or the second concrete member, and an anticorrosion part that covers the fixing tool. The tension part includes a stranded wire part and a first cover that covers an outer periphery of the stranded wire part. A space between the sheath and the tension part is not filled with a grout material.
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公开(公告)号:US10323415B2
公开(公告)日:2019-06-18
申请号:US14891638
申请日:2014-12-18
发明人: Katsuhito Oshima , Masato Yamada , Yoshiyuki Matsubara , Kiminori Matsushita , Shuichi Tanaka , Jun Sugawara , Shingo Nakajima
摘要: A pregrouted PC steel material (10) includes a 19-wire-twisted PC strand (1), a pregrouted layer (2) disposed on an outer periphery of the PC strand (1), and a sheath (3) configured to cover an outer periphery of the pregrouted layer (2). A filling resin (4) is filled between steel wires (side wires) (1b, 1c, 1d). Since the filling resin (4) does not exude to the pregrouted layer (2) before tensioning of the PC strand (10), an operation of tensioning the PC strand (1) is not hindered by curing of the pregrouted layer (2). In contrast, since the gap between the steel wires is reduced when the PC strand (1) is tensioned, the filling resin (4) flows out (exudes) from between the steel wires to the pregrouted layer (2) to cure the pregrouted layer (2) only after the reduction.
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