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围岩分级是隧道建设的基础资料，对以铁路为主的隧道围岩分级历史作简要回顾。
Tunnel surrounding rock classification history mainly on railways was introduced and analyzed; the surrounding rock classification is the basic data for tunnel construction.
针对韩家岭公路隧道现场实践，进行了现场隧道围岩分级的模糊综合评判，对评判结果进行了分析。
Here, the surrounding rock in Hanjialing highway tunnel was classified by fuzzy synthesis assessment method, and assessment results were analyzed.
据此，对韩家岭隧道围岩进行了分级和评价，证实所建立分级方法的可行性、准确性和优越性。
Hereby, surrounding rock mass in Hanjialing tunnel is classified. The feasibility, veracity, and advantage of founded neural networks method are verified.
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