初应力的调整,是成束张拉预应力钢筋的一个关键,如应力不均就会严重地影响钢筋混凝土构件的质量。为此,我们设计制成了初应力调整锚具,经使用效果良好。这种锚具分张拉端和调整端两部分,采用45号钢经热处理制成(图4、5)。适用于先张法,长短线、成束预应力钢筋初应力的调整(预应力钢筋间距 The adjustment of the initial stress is one of the keys of the prestressed steel bundles. If the stress is not uniform, it will seriously affect the quality of the reinforced concrete components. For this reason, we have designed and made initial stress adjustment anchorages that have been used with good results. This kind of anchor is divided into two parts: tensioning end and adjusting end. It is made by heat treatment of No. 45 steel (Fig. 4, 5). Suitable for the pretensioning method, the adjustment of the initial stress of long-short and bundled prestressed steel bars (prestressed steel bar spacing)