同时也验证了两种计算主动极限位移的方法的有效性。
Simultaneously, the two methods of calculating the active limit displacement are also confirmed rational.
隧道的极限位移不仅与围岩类别有关，还与洞室大小、形状、支护形式、支护厚度、施工方法和破坏状态等因素有关。
The limit displacements of tunnelling is influenced by surrounding rock, tunnelling size and shape, supported structure form and thickness, constructing method and failure form.
阐述了隧道支护系统极限位移的意义，系统地介绍了初期支护极限位移的确定方法。
Concept of limit displacements of primary support system of railway tunnel are presented, and the method for determining the limit displacements is introduced systematically.
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