Taking new Gui-Guang railway as an example,the paper introduces the dynamic design principles and methods of 2# inclined shaft soft surrounding rock deformation testing section of Tianpingshan tunnel.As a result,it realizes the large deformation control of soft surrounding rock,reduces construction security risk,improves engineering schedule,and achieves expected purpose.%以新建贵广铁路为例,介绍了天平山隧道2号斜井软弱围岩大变形试验段的动态设计的原理与方法,实现软弱围岩大变形控制,降低了施工安全风险,提高了工程进度,达到预期目的。
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