RESEARCH ON GENERALIZED LONGITUDINAL EQUIVALENT CONTINUOUS MODEL OF SHIELD TUNNELS
RESEARCH ON GENERALIZED LONGITUDINAL EQUIVALENT CONTINUOUS MODEL OF SHIELD TUNNELS
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发表时间：
2009
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通讯作者：
Zhang Mengxi
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作者：
Zhang Mengxi
在传统纵向等效连续模型的基础上，提出了广义纵向等效连续模型，以磁悬浮列车耀华地方公路隧道为例，研究了隧道纵向有效刚度比随隧道横向刚度和纵向缝影响范围的变化规律，提出了隧道纵向有效刚度比的计算方法，并给出了隧道纵向有效刚度比的计算公式分析结果表明，随着横向刚度的减小，受压区面积增大，纵向有效刚度比减小;随着纵向节点影响范围的增大，纵向等效刚度比减小，传统的和修正的纵向等效连续模型均可视为该模型的特例，该模型适用范围更广，为盾构隧道纵向稳定性分析提供参考。
Based on conventional longitudinal equivalent continuous model,a generalized longitudinal equivalent continuous model is proposed,in which transverse rigidity of the tunnel and the influential region of the longitudinal joints are considered.Yaohua local road tunnel for magnetic suspension train is selected as an example to investigate the variation of longitudinal effective rigidity ratio with the transverse rigidity and the influential region of the longitudinal joints.The analytical results show that,as the transverse rigidity decreases,the area of compressive region increases and the longitudinal effective rigidity ratio decreases.As the influential region of the longitudinal joints increases,the longitudinal effective rigidity ratio decreases.Both the conventional and the modified longitudinal equivalent continuous models can be regarded as special cases of the proposed model.The proposed model is more widely applicable and is of reference value for longitudinal stability analysis of shield tunnels.