The equivalence of a jointed shield-driven tunnel lining to a continuous ring structure
The equivalence of a jointed shield-driven tunnel lining to a continuous ring structure
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DOI：
10.1139/cgj-38-3-461
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发表时间：
2001-06-01
影响因子：
3.6
通讯作者：
Ge, XW
中科院分区：
文献类型：
--
作者：
Lee, KM;Ge, XW
本文提出了一种确定修正系数的新方法，以将接缝盾构隧道衬砌近似为平面应变条件下的连续环形结构。提出了一种土压力分布模式，该模式是根据现场观察到的软粘土浅层隧道的长期行为而开发的。 “力法”用于确定联合盾构隧道的内力和位移。隧道衬砌的竖向位移或水平位移都可以作为常用的匹配参数。该方法可以考虑接缝刚度、土壤阻力、接缝分布、接缝数量和隧道几何形状等因素。针对城市地铁隧道的典型隧道衬砌几何形状，还提出了等效因子估计的简化设计方程。通过与实验室测试结果进行比较来评估所提出的等效方法。
This paper presents a new method of determining the correction factor to approximate a jointed, shield-driven tunnel lining as a continuous ring structure under plane strain conditions. An earth pressure distribution pattern is proposed which is developed based on the long-term behavior of shallow tunnels constructed in soft clays as observed in the field. The "force method" was used to determine the internal forces and displacements of jointed, shield-driven tunnels. Either the vertical or the horizontal displacement of the tunnel lining can be used as a common matching parameter. Factors such as joint stiffness, soil resistance, joint distribution, number of joints, and tunnel geometry can be considered by the proposed method. Simplified design equations for the estimation of equivalence factors are also proposed for the typical tunnel lining geometry of urban subway tunnels. The proposed equivalence method was evaluated by comparing it with the results of laboratory tests.