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有粘结预应力的施工流程是怎样的?

问答题
2022-04-20 02:06
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正确答案
有粘结后张法预应力的主要施工工序为:浇筑好混凝土构件,并在构件中预留孔道,待混凝土达到预期强度后(一般不低于混凝土设计强度的75%),将预应力钢筋穿人孔道;利用构件本身作为受力台座进行张拉(一端锚固一端张拉或两端同时张拉),在张拉预应力钢筋的同时,使混凝土受到预压。张拉完成后,在张拉端用锚具将预应力筋锚住;最后在孔道内灌浆使预应力钢筋和混凝土构成一个整体,形成有粘结后张法预应力结构。

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