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隧道通风问题是长大隧道建设和运营中亟待解决的重要问题之一。在实际工程中,长大隧道通常采用地下风机房作为辅助通风巷道。以山西省和榆高速公路云山隧道为背景,利用大型有限元分析软件模拟地下风机房在不同工况下斜井进入主洞的施工过程,分析研究不同工况下主洞与斜井交叉部位的围岩位移场和应力场的变化,揭示了不同工况下隧道洞周围岩的位移和应力变化规律,提出了采用台阶法开挖隧道的根据,指出了斜井两侧的主洞采用两个工作面同时开挖与分别开挖对交叉部位的围岩位移和应力的影响,为优化施工工法提供了依据,可为类似工程设计和施工提供参考依据。
Tunnel ventilation is one of the most important issues to be solved urgently in the construction and operation of long tunnels. In actual engineering, the tunnels of underground tunnels usually use the underground wind turbine as the auxiliary ventilation tunnel. Taking the Yunshan Tunnel of Shanxi Province and Yu-Yu Expressway as the background, the large-scale finite element analysis software was used to simulate the construction process of the underground wind turbine room entering the main tunnel under different working conditions and the main tunnel was analyzed under different working conditions The displacement and stress of surrounding rock are revealed under different working conditions. The basis of excavation of tunnel by step method is put forward. It is pointed out that the main tunnel on both sides of inclined shaft is made of two The effect of simultaneous excavation and separate excavation on the displacement and stress of the surrounding rock at the intersections provides the basis for optimizing the construction method and can provide reference for the similar engineering design and construction.