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中文摘要：
针对正在建设的宝兰客运专线出现的大量超大断面黄土隧道，介绍了客运专线中黄土隧道的初期支护结构设计研究情况，对于隧道初期支护弹性模量的取法问题，采用折算法和模拟法分别计算隧道初期支护的等效弹性模量，通过对2种计算结果进行对比，结合围岩压力监测资料，分析了初期支护弹性模量的取值及初期支护压力。研究结果表明：运用模拟法计算的初期支护等效弹性模量更贴切，对今后类似工程的设计与施工具有一定参考价值。
英文摘要：
There are a lot of super-large cross-section loess tunnels on Baoji-Lanzhou passenger-dedicated railway.In this article,the-state-of-the-art of studies on the design of the primary support of loess tunnels on passenger-dedicated railways is presented,the equivalent elastic modulus of the primary support of the tunnels is calculated by means of con-version method and simulation method,comparison and contrast is made between the calculation results obtained by these two calculation methods,the value of the elastic modulus of the primary support and the pressure of the primary support are analyzed on basis of the monitoring data of the rock mass pressure.The study results show that the equivalent elastic modulus of the primary support calculated by simulation method is more accurate.The paper can provide refer-ence for the design and construction of similar projects in the future.
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