下螺母凸顶的滑动零件上有一条小弧线充当楔块。
A small curve in the sliding part of the convex top of the lower nut acts as the wedge.
当前某些新型锚杆有忽视顶锚的不良倾向。作者介绍了新研制的楔管式锚杆的结构、加固原理、锚固性能、及其在现场条件下的拔拉试验与工业应用结果。
The authors described the structure of a newly - developed wedge-tube bolt, its reinforcement principles and anchoring performance, and the results of in situ pull test and productive applications.
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