文章对锚索锁具的摩擦自锁原理及不同形式的张拉机具对锚索的张拉过程进行了分析。分析结果显示,锚索张拉时,若张拉机具的拉力作用在锁舌上,则大部分张力被外漏的部分锚索承担,而锚索索体并未真正张拉。这一现象在施工现场是普遍存在的,必须对锚索的张拉机具进行严格审查监管才能避免。 This paper analyzes the principle of friction and self-locking of anchor lock and the tensioning process of anchor cable by different types of tensioning equipment. The analysis results show that when the tensioning cable is tensioned, if tension of the tensioning device acts on the locking bolt, most of the tension will be borne by the part of the leaked cable while the cable body of the anchor cable is not really stretched. This phenomenon is ubiquitous at the construction site. It is necessary to strictly examine the tensioning equipment of the anchor cable to avoid it.