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锚杆随着锚固长度的增加,极限抗拔力并不是线性增加的,而是增加得越来越不明显。为此,本文提出了预应力锚固这一概念,预应力锚固可以在锚固长度不增加的情况下增加极限抗拔力,而且对锚固长度长的锚杆更有效,并用理论和试验证明了这一结论。分析了预应力锚固和预应力锚杆的区别。提出了预应力锚固的锚杆的施工方法,分析了与其相应的握裹力分布和极限抗拔力。对比了预应力锚固的锚杆与非预应力锚固的锚杆的不同。
As the anchorage length increases, the ultimate pull-out force does not increase linearly, but increases less and less obviously. To this end, this paper presents the concept of prestressed anchorage. Prestressed anchorage can increase the ultimate pullout force without increasing the anchorage length, and it is more effective for anchors with longer anchorage length. And this is proved by theory and experiment in conclusion. The difference between prestressed anchor and prestressed anchor is analyzed. The construction method of prestressed anchorage bolt is put forward, and the corresponding distribution and ultimate pull-out force of the anchorage are analyzed. The difference between prestressed anchors and non-prestressed anchors is compared.