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在地铁隧道下穿铁路桥,由于开挖扰动、地层损失、固结沉降及施工降水等因素,势必会引起地层位移和应力的重分布,位于周围地层中的铁路桥梁结构也会随之产生位移及变形,其上的轨道结构也将发生位移、变形,涉及到铁路的正常运营。本文结合实际工程研究地铁隧道下穿铁路框构桥,为地铁隧道下穿铁路桥的设计、施工提出指导性的意见或建议,从而规避风险。
Under the subway tunnel crossing the railway bridge, due to excavation disturbance, formation loss, consolidation settlement and construction precipitation and other factors, will inevitably lead to the formation of displacement and stress redistribution, is located in the surrounding strata of the railway bridge structure will also be displaced And deformation, the track structure will also occur on the displacement, deformation, involving the normal operation of the railway. In this paper, the actual engineering study subway tunnel under the railway frame bridge, the subway tunnel under the railway bridge design and construction of guidance or suggestions to avoid risks.