锚固类结构杆体临界锚固长度问题综合研究——国内相关研究进展

锚固类结构是指注浆锚杆、锚索和土钉一类岩土工程加固支护结构。锚固类结构杆体临界锚固长度是指一定岩土介质中锚固类结构杆体的极限锚固长度，超过此长度，其承载力将不再明显增加；未达此长度，其承载力尚有一定潜力可挖。半个多世纪以来，国（境）外从不同的侧面对临界锚固长度的相关问题进行了研究，但系统的研究仍较为缺乏，直接的研究极为少见，因而此问题尚未真正解决，仍处于局部发现问题局部探讨解决的阶段。我国关于锚固类结构杆体临界锚固长度问题的相关研究起步晚于国外，但关于该问题的直接研究在近年来还是明显多于国外。我国已提出试验判别临界锚固长度的方法，已研究确定某些介质的临界锚固长度及相应的技术规范。

A Comprehensive Study on the Critical Anchorage Length of Anchored Structural Rods: Progress in Domestic Related Research

Anchorage structures refer to geotechnical engineering reinforcement support structures such as grouted anchor rods, anchor cables, and soil nails. The critical anchoring length of anchored structural rods refers to the ultimate anchoring length of anchored structural rods in a certain geotechnical medium. Beyond this length, its bearing capacity will no longer significantly increase; Not reaching this length, there is still some potential for its bearing capacity to be excavated. For over half a century, research has been conducted on the issue of critical anchorage length from different perspectives both domestically and internationally. However, systematic research is still lacking, and direct research is extremely rare. Therefore, this problem has not been truly solved and is still in the stage of local discovery and exploration and resolution. The research on the critical anchoring length of anchor structures in China started later than abroad, but there has been a significant increase in direct research on this issue in recent years. China has proposed a method for determining the critical anchoring length through experiments, and has studied and determined the critical anchoring length of certain media and corresponding technical specifications