Analysis on shield operational parameters to steer articulated shield
Analysis on shield operational parameters to steer articulated shield
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DOI：
10.3208/jgssp.atc6-11
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发表时间：
2016-01
期刊：
影响因子：
--
通讯作者：
T. N. Huynh;Junya Chen;M. Sugimoto
中科院分区：
文献类型：
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作者：
T. N. Huynh;Junya Chen;M. Sugimoto
铰接式盾构是目前在曲线隧道施工中应用最广泛的一种盾构法。铰接式盾构的转向需要确定千斤顶、仿形刀具和铰接机构的动作。但是由于这三个函数与屏蔽行为具有高度的共线性，因此很难立即获得唯一的操作参数。为此，提出了一种在一定约束条件下，根据几何条件唯一确定仿形刀具长度和铰接角的数值方法。本文给出了一个应用该方法的三维复合对齐的例子，并讨论了该模型的有效性。研究结果表明：铰接角取决于盾构尺寸、隧道线形和盾构回转操作规程，仿形刀长度分布在隧道主法线方向上，约占蒙皮面积的一半;和3）分析结果表明，该方法从角度上可以提供合理的铰接角度和仿形刀具长度和范围几何条件下的点。
Nowadays, articulated shield becomes popular to construct tunnels with curved alignments. To steer the articulated shield, it is necessary to determine the operation on jack, copy cutter and articulation mechanism. But since these three functions have a high co-linearity to shield behavior, it is difficult to obtain unique operational parameters at once. Therefore, the authors developed a numerical method to determine the copy cutter length and the articulation angle uniquely, based on geometric conditions under some constraint conditions. This paper shows an example of the application of the proposed method to a 3 dimensional compound alignment and discusses the validity of the proposed model. As conclusions, the followings were found: 1) the articulation angle depends on shield dimension, tunnel alignment and operation rules of shield rotation; 2) the copy cutter length distributes across the major normal direction of the tunnel about a half of the skin plate area; and 3) the analysis results demonstrate that the proposed method can provide articulation angle and copy cutter length and range reasonably from the view point of geometric conditions.