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Reinforcing effect of face bolts for tunneling: Application of X-ray CT and centrifuge model test

机译:掘进工作面锚杆的加固效果:X射线CT和离心模型试验的应用

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The purpose of this paper is firstly to simulate the tunnel face failure in laboratory with four cases of model tests by pulling out tunnel model from a sandy ground that are without using auxiliary method nor face bolting and using face bolting with three different lengths of bolts, and secondary, to investigate the behavior of model ground using X-ray computed tomography (CT) scanner to visualize the failure zone in three dimensions. In addition to those results, a series of centrifuge model tests are conducted to confirm the results of X-ray CT test and also to discuss the ground behavior under full scale stress level. Finally, the effect of face bolting method is evaluated based on all the test results.
机译:本文的目的是首先通过在沙地上拔出隧道模型(不使用辅助方法也不使用锚固螺栓,而使用具有三种不同长度螺栓的锚固螺栓)从沙质地层中抽出隧道模型,用四种情况下的模型测试来模拟实验室中的隧道工作面破坏,其次,使用X射线计算机断层摄影(CT)扫描仪调查模型地面的行为,以可视化三维故障区域。除了这些结果之外,还进行了一系列离心模型测试,以确认X射线CT测试的结果,并讨论了在满刻度应力水平下的地面行为。最后,根据所有测试结果评估了锚杆锚固方法的效果。

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