CAJ | 학술논문

以兰渝线新城子隧道为背景，利用有限元法模拟并分析了不同开挖方法对软岩小净距隧道的相互影响，以及双层支护结构在小净距隧道中的应用效果。结果表明，双层支护可以有效的控制地应力的分阶段释放；第一层初支承担大部分围岩荷载，第二层初支承担第一层初支变形引起的荷载；通过对比分析发现，两隧道交互开挖、待左右线均开挖完成后再施作二衬为最优工法。
이란투선신성자수도위배경，이용유한원법모의병분석료불동개알방법대연암소정거수도적상호영향，이급쌍층지호결구재소정거수도중적응용효과。결과표명，쌍층지호가이유효적공제지응력적분계단석방；제일층초지승담대부분위암하재，제이층초지승담제일층초지변형인기적하재；통과대비분석발현，량수도교호개알、대좌우선균개알완성후재시작이츤위최우공법。
Based on the background of Xinchengzi Tunnel on Lanzhou-Chongqing line,the finite el-ement method is used to simulate and analyze different excavation methods for close-spaced soft rock tunnel.The results show that it is prone to large deformation and stress in the sidewall of the adj acent side when close-spaced tunnels are constructed at the same time.Most of the loads are undertook by the first layer support,and the deformation of first layer support is undertook by the second layer support.Meanwhile,by comparative analysis,it is found that constructing the secondary lining after the completion of excavating the right and left lines is the best engineering method when two tunnels are excavated interactively.The analysis result provides the close-spaced soft rock tunnel construction with referential basis.