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Numerical simulation of longitudinal settlement of shield tunnel in the coastal city Shanghai

机译：上海沿海城市盾构隧道纵向沉降的数值模拟

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摘要

Until now more than 14 subway lines are in operation and some new lines are being built in the coastal city Shanghai. The longitudinal settlement of shield tunnel has significant effect on the safety of the subway operation. In this paper, the deformation of the shield tunnel and the surrounding soil were analyzed by the establishment of a three-dimensional model. The vertical displacements of four paths (Path 1 is on the ground; Path 2 is at the top of the tunnel; Path 3 is in the middle of the tunnel; Path 4 is at the bottom of the tunnel) are affected by the nature of the soil. The horizontal displacement is smaller than the vertical displacement and horizontal displacement of the clay is larger than that of the sand. The distribution of the pore pressure changes with soil properties around the tunnel. The pore pressure of the sand layer is larger than that of the clay layer at the same depth of underlying soil.
机译：到目前为止，超过14条地铁生产线正在运行中，并在上海沿海城市建造了一些新的线条。 盾构隧道的纵向沉降对地铁操作的安全性具有显着影响。 本文通过建立三维模型分析了屏蔽隧道和周围土壤的变形。 四个路径的垂直位移（路径1位于地面;路径2位于隧道的顶部;路径3位于隧道的中间;路径4位于隧道的底部）受到本质的影响 土壤。 水平位移小于垂直位移，并且粘土的水平位移大于沙子的水平位移。 孔隙压力的分布随隧道周围的土壤性质而变化。 砂层的孔隙压力大于粘土层在相同的下层土壤中的粘土层。

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