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为解决地铁盾构穿越既有高速铁路的技术难题,本文以北京地铁十号线下穿京沪高铁为背景,应用大型有限元软件模拟了地铁盾构穿越高速铁路的动态施工过程。通过理论分析和数值模拟等方法,研究了地层条件、地铁埋深、双线水平间距和盾构施工参数(注浆效果、注浆压力和掌子面推力)等因素对地铁施工引起的地层、路基和轨道结构的变形及应力影响程度及其规律,根据研究提出地铁盾构穿越路基型高速铁路的建议控制标准及关键控制措施,为地铁穿越高速铁路的设计与施工提供重要的参考依据。
In order to solve the technical problem of metro shield crossing existing high-speed railway, this paper uses the large-scale finite element software to simulate the dynamic construction process of metro shield crossing high-speed railway with Beijing-Shanghai high-speed rail under Beijing Metro Line 10 under the background. By means of theoretical analysis and numerical simulation, the effects of the formation conditions, the depth of the subway, the horizontal distance between two lines and the construction parameters of the shield (grouting effect, grouting pressure and face lift) Based on the research, the proposed control standards and key control measures for subgrade shield-crossing high-speed railway are provided, which provide important reference for the design and construction of subway crossing high-speed railway.