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中文摘要：
就宜万铁路堡镇隧道高地应力大变形段中所揭示的黑色炭质页岩设计不同饱水时间下的三轴试验方案，进行三轴力学性质测试，获得围压和饱水时间对软岩残余强度和峰后体积变化的影响规律，探讨二者对软岩残余强度和体积变化的作用机制及特点，对隧道二次衬砌作用时机进行分析。
英文摘要：
The post-peak mechanical behaviors of black macker widely distributed in Baozhen tunnel are discussed by a series of triaxial compressive tests under different saturated times, and research on changing laws of rock residual strengths and post-peak volumetric strain under different confining pressures and saturated times is carried out. In addition, the mechanism and features of confining pressure, saturation time acting on remnant strength are researched. Finally, the timing of carrying out secondary lining is analyzed.
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