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按常规的收敛-约束法设计隧道时,只考虑了某个时刻的岩体特性。当采用喷混凝土作为初期支护时,这种设计方法会导致很大误差。强度和变形等力学性质在喷混凝土初期会有很大的变化,此时容易出现临界状态并且常常会引起破坏。本文根据收敛-约束法的原理提出了一种设计方法,在此方法中考虑了岩体和喷混凝土与时间的相关性。文中所述为与实际隧道的现场量测结果相比较的一个应用实例。
When designing the tunnel according to the conventional convergence-restraint method, only the rock mass characteristics at a certain moment are considered. When using sprayed concrete as the initial support, this design method can lead to large errors. Mechanical properties, such as strength and deformation, vary greatly during the initial shotcrete stage, at which point critical conditions tend to occur and often cause damage. In this paper, a design method is proposed based on the principle of convergence-constraint method. In this method, the correlation between rock mass and shotcrete with time is considered. The article is compared with the actual tunnel field measurement results compared to an application example.