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前言 我国西北地区曾修建了大量的单线及双线黄土隧道,积累了丰富的经验。 黄土不同于一般的土质地层,它具有一定的自稳性。只要隧道断面形式及设计参数合
Preface China’s northwestern region has constructed a large number of single and double loess tunnels and has accumulated rich experience. Loess is different from the general soil layer, it has a certain degree of self-stability. As long as the tunnel section form and design parameters together