基于Midas/GTS对朝叶隧道施工方法研究

BASED ON MIDAS/GTS RESEARCH OF CONSTRUCTION METHOD OF CHAOYE TUNNLE

本文以朝叶隧道为工程背景,基于非线性理论,建立Midas/GTS有限元分析模型,对大断面公路隧道在施工过程中的几种主要影响因素进行研究,分析隧道断面台阶数、预留核心土宽度、导坑开挖顺序、先行导坑进尺长度、每循环进尺长度、预设超前锚杆长度等的影响程度。结果表明,在施工方案的选取时应综合分析以上因素选择最优方案,合理的方案组合可以保证工程的安全施工。

With Chaoye tunnel as the engineering background, the finite element analysis model of this tunnel is established by by Midas/GTS software based on the nonlinear theory. Some key influencing factors of construsetion process of tunnel with large cross section. Such as the number of steps of tunnel section, the width of core soil, and the sequence of excavation pits. the first pilot footage length, footage length per cycle, the default advance anchor length, and soon, are investigited. The result shows that the factors above should be considered synthetically to select the most suitable method , reasonable combination of methods ensuring the safety of engineering.