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文章分析了陕西、甘肃黄土、软岩隧道调查结果,认为在软弱地层修筑隧道采用整体式衬砌难免隧道渗漏水,应将隧道稳定与隧道防排水分别进行,才有可能保证隧道不漏水。故应采用复合式衬砌,即两次模筑衬砌、或初期支护二次衬砌等形式,以保证防、排水构造作用可靠。另外,文中还提出了黄土地区黄土软岩隧道防排水结构设计原则,并根据黄土地区的自然特征,给出了3种防排水结构型式的适用条件。
This paper analyzes the survey results of loess and soft rock tunnels in Shaanxi and Gansu Provinces. It is considered that it is inevitable to construct tunnels in weak stratum to avoid tunnel seepage water with integral lining, and to stabilize tunnels and prevent tunnels respectively. It should be used composite lining, that is, two mold lining, or the initial support of the second lining and other forms to ensure anti-drainage structure and reliable role. In addition, the design principles of drainage and drainage structure for loess soft rock tunnel in the loess area are also proposed. According to the natural features of loess area, the applicable conditions of three drainage and drainage structures are given.