A Computational Method for Ground Penetrating Shield Tunnel
A Computational Method for Ground Penetrating Shield Tunnel
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DOI：
10.1061/9780784413449.023
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
W. Ding;Yuelang Jin;Wei Zhao;Hong-tao Jiang;Yinping Zhang
中科院分区：
文献类型：
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作者：
W. Ding;Yuelang Jin;Wei Zhao;Hong-tao Jiang;Yinping Zhang
对于超浅埋隧道——如穿地盾构隧道（GPST）——衬砌的内力和变形与普通隧道有很大不同。本文采用非线性壳弹簧模型来模拟衬砌的性能。考虑衬砌接缝的配置，采用3D数值模型计算纵向接缝的刚度，并进一步分析衬砌的性能。结果表明，超浅埋隧道与一般隧道相比，弯矩较大，轴力较小。此外，纵向接缝接头的弯曲刚度变小并且表现出非线性。并对壳弹簧模型与平均环法进行了比较。对比分析表明，对于常规隧道，非线性壳弹簧模型计算的内力与平均环模型计算的内力结果接近；但是，变形值显着不同。因此，超浅埋隧道计算中需要考虑非线性节点刚度。
For the super-shallow embedded tunnel - like a ground-penetrating shield tunnel (GPST) - the internal force and deformation of the lining are quite different from the normal ones. This paper adopts the nonlinear shell spring model to simulate the behavior of a lining. Taking the configuration of lining joints into consideration, a 3D numerical model was taken to calculate the stiffness of longitudinal joints and the lining behavior is further analyzed. The results show that in super-shallow embedded tunnel, the moment is larger while the axial force is smaller compared with the general one. Also, the bending stiffness of the longitudinal seam joints becomes smaller and behaves non-linearly. What's more, the shell spring model is compared with the mean ring method. The contrast analysis shows that, for conventional tunnels, the internal force calculated by a nonlinear shell spring model is close to the results by the mean ring model; but, the deformation values are significantly different. Therefore, it is necessary to consider the non-linear joints stiffness in the calculation of the super-shallow embedded tunnel.