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浅埋偏压黄土隧道因其特殊的受力形式、黄土特殊的工程性质等,使得其施工顺序对隧道围岩稳定性的影响较大,且与一般山岭隧道的施工顺序对围岩稳定性的影响有所不同。结合工程实际,利用ANSYS软件对不同施工顺序的浅埋偏压黄土隧道围岩稳定性进行分析,并通过不同工况下的数值模拟计算,得出围岩的变形规律和支护结构的受力特征。研究表明,对于浅埋偏压隧道而言,采用先开挖深埋侧后开挖浅埋偏压侧的施工顺序,更利于减少浅埋偏压侧支护结构的受力和维护整体围岩的稳定。
Because of its special form of stress and the special engineering properties of loess, the shallowly-buried and biased loess tunnel makes its construction sequence have a great influence on the stability of the surrounding rock of the tunnel. And it is in good agreement with the general construction sequence of the mountain tunnel on the stability of the surrounding rock The impact is different. Combined with engineering practice, the stability of surrounding rock of shallowly-buried and biased loess tunnel with different construction sequence is analyzed by ANSYS software. Through the numerical simulation under different conditions, the deformation law of surrounding rock and the force of supporting structure feature. The research shows that for the shallowly buried biased tunnels, the construction sequence of excavating the shallow buried side after excavation of the deep buried side is more conducive to reducing the stress of the shallow buried side support structure and maintaining the whole surrounding rock Stable.