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近年来,锚杆支护技术在国外得到迅速发展和广泛应用,一些新型锚杆相继出现,胀管式摩擦锚杆是继开缝式摩擦锚杆之后的一种新型摩擦式锚杆,由瑞典阿特拉斯柯普柯公司(Atlas Copco)开始试验研究的。这种锚杆安装极为方便,锚固力大,抗冲击震动性能好,适用于各类岩层条件,特别适用于具有较大位移的软弱岩层。该锚杆已引起人们的注意,笔者根据国外有关期刊和学术会议上发表的试验研究论文,将该锚杆的结构、作用原理与开缝式锚杆(开缝式锚杆已广泛应用)作一比较。
In recent years, the bolt support technology has been rapidly developed and widely used in foreign countries, a number of new types of bolts have emerged, expanded tubular friction bolt is a new type of friction bolt after the slotted friction bolt, from Sweden Atlas Copco started experimental research. This kind of anchor rod is extremely convenient to install, has strong anchoring force and good shock and vibration resistance. It is suitable for all kinds of rock conditions, especially for weak rock layers with large displacement. The bolt has drawn people’s attention. According to the experimental research papers published in relevant foreign journals and academic conferences, the author analyzes the structure and principle of the bolt and the principle of slotted bolt (the bolt has been widely used) A comparison.