The paper introduces operating principle of strain-gange force anchor,mechanical force anchor and vibrating-wire force anchor,points out the problems in practice.

• 分析了电阻应变式测力锚杆、机械式测力锚杆、钢弦式测力锚杆的工作原理,并分别指出了它们在工程实际应用中存在的问题。