锚杆锚固段设计的一个技术焦点—临界锚固长度不宜作为锚固长度上限

The Technique Focus of Designing Anchor Fixed Length-critical Anchoring Length is Not Suitable for Upper-limit of Anchoring Length

阐述了锚杆锚固长度上限设置的不同观点和做法,分析了以临界锚固长度作为上限的设计方法的缺陷,提出了"合理锚固长度"的概念和设计方法以及较佳锚固长度上限的建议值。

Different views and practices of setting upper-limit of anchoring length are discussed, the defects of design method for taking critical anchoring length as upper-limit are analysed, and ＂ the reasonable anchoring length＇ and its design method are proposed, and the adequate upper-limit of anchoring length are recommended.