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中文摘要：
以兰渝铁路胡麻岭隧道为工程背景,采用现场监测方法得到大断面黄土隧道初期支护与二次衬砌之间的接触压力,并讨论该接触压力随时间的发展规律和沿洞周的空间分布特性。根据铁路隧道设计规范计算得到作用于衬砌结构的计算荷载,采用荷载结构模型分别计算实测和计算荷载作用下的二次衬砌内力,并进行对比分析。研究方法和结论对分析软弱地层衬砌结构的受力特性、建立更加科学合理的隧道设计方法具有一定的参考价值。
英文摘要：
Taking Humaling tunnel in Lanzhou—Chongqing railway as project background,contact pressure between the primary lining and secondary lining of large-section loess tunnel was acquired by means of in-situ monitoring;development law over time and spatial distribution along the tunnel ring of the contact pressure were discussed.Loads on the secondary lining were calculated according to code for design on tunnel of railway.Internal force of the secondary lining under calculation loads and monitoring loads was solved individually by load-structure model;and a comparative analysis was conducted.The study method and conclusions can provide references to analyze the mechanical characters of lining in soft ground and establish a scientific and reasonable design method of tunnel.
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