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隧道工程设计方法有三种:经验的,观测的和解析的。经验方法至今仍是主要的方法,而围岩分类在经验方法中构成不可缺少的一个组成部分。从围岩分类可以
There are three types of tunnel engineering design methods: empirical, observational and analytical. Empirical methods are still the main method so far, and the classification of wall rocks is an indispensable part of empirical methods. Can be classified from surrounding rock