GROUND AND PILE-GROUP RESPONSES DUE TO TUNNELLING
GROUND AND PILE-GROUP RESPONSES DUE TO TUNNELLING
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DOI：
10.3208/sandf.41.57
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发表时间：
2001-02
影响因子：
3.7
通讯作者：
N. Loganathan;H. Poulos;K. Xu
中科院分区：
文献类型：
--
作者：
N. Loganathan;H. Poulos;K. Xu
摘要：在城市地区，许多高层建筑采用桩基支撑，近年来软土地基隧道的数量迅速增加。为了最大限度地减少隧道施工造成的损坏风险，设计隧道的工程师需要能够对隧道施工引起的地面变形及其对任何相邻桩基的影响做出可靠的预测。在本文中，作者开发了一种封闭式解决方案，用于评估隧道周围的位移场。然后，在简化边界元分析中将估计的位移施加到单桩和桩群上，以计算桩和桩群响应。本文提出的分析方法通过案例和使用 FLAC3D 计算机软件获得的数值结果进行了验证。进行比较以评估各种桩群配置的群作用。还介绍了隧道中各种桩长和桩位置的影响。
ABSTRACT In urban areas, where many of the high-rise buildings are supported by pile foundations, the number of soft- ground tunnels has increased rapidly during recent years. To minimize the risk of damage as a result of tunnel construction the engineer who designs a tunnel needs to be able to make reliable predictions of the ground deformations induced by tunnelling and their effects on any adjacent pile foundations. In this paper, a closed form solution, developed by the authors, is used to assess the displacement field around the tunnel. The displacements estimated are then imposed on single piles and pile groups in simplified boundary element analyses to compute pile and pile group responses. The analytical method presented in this paper was verified with a case history and with numerical results obtained using FLAC3D computer software. Comparisons are made to evaluate the group action for various pile group configurations. The influence of various pile lengths and pile locations from the tunnel is also presented.