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首页> 外文期刊>Tunnelling and underground space technology >Predicting anomalous zone ahead of tunnel face utilizing electrical resistivity: Ⅱ. Field tests
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Predicting anomalous zone ahead of tunnel face utilizing electrical resistivity: Ⅱ. Field tests

机译：利用电阻率预测隧道工作面前的异常区：Ⅱ。实地测试

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In our companion paper (Park et al., 2016), a method was developed to predict the characteristics (i.e., location, thickness, permittivity ratio, and conductivity) of the anomalous zone ahead of a tunnel face by utilizing the electrical resistivity of the ground (hereafter referred to as the Ground Prediction Method). The prediction accuracy of the developed Ground Prediction Method is investigated via laboratory tests using artificially created anomalies. This paper is part two in the series of companion papers; it attempts to examine the prediction accuracy of the developed Ground Prediction Method via field testing. The field tests are performed at railway and highway construction sites, at which conventional tunneling methodology is employed for tunnel construction, as well as at a subway tunnel construction site, at which an earth pressure-balanced shield tunnel boring machine is used for tunneling work. At tunneling job sites using the conventional tunneling method, a relatively stronger and weaker zone are predicted ahead of the tunnel face at the railway and highway construction sites, respectively. On the other hand, a relatively stronger zone exhibiting lower permittivity than that of the rock adjacent to the tunnel face is predicted at the tunneling site employing the mechanized tunneling method. In conclusion, assessing the ground condition, ahead of the tunnel face via the newly developed Ground Prediction Method proves to be effective; prediction results of ground conditions show good agreement with those characterized via direct observation of the excavated face taken during tunneling work using conventional tunneling methods, in addition to those predicted from daily observations of muck conditions carried out in the process of tunnel construction using the mechanized tunneling method.
机译：在我们的随行论文中（Park等，2016），开发了一种方法来预测隧道面前方异常区域的特征（即位置，厚度，介电比和电导率），方法是利用隧道的电阻率。地面（以下称为地面预测方法）。已开发的地面预测方法的预测精度通过使用人工创建的异常的实验室测试进行了研究。本文是系列论文的第二部分。它试图通过现场测试来检验已开发的地面预测方法的预测准确性。现场测试是在铁路和公路施工现场进行的，在现场施工中采用传统的隧道方法进行隧道施工；在地铁隧道施工现场进行的是土压力平衡盾构隧道掘进机进行隧道施工。在使用常规隧道方法的隧道施工现场，分别在铁路和公路施工现场的隧道面之前预测出相对较强和较弱的区域。另一方面，在采用机械化掘进方法的掘进地点，预测出比在邻近掘进工作面的岩石具有更低介电常数的区域。总之，通过新开发的地面预测方法评估隧道面前方的地面状况是有效的。地面状况的预测结果与通过常规观察方法直接观察在掘进工作中所采掘工作面所获得的特征相吻合，此外还可以从对机械化隧洞施工过程中进行的泥土状况的日常观察中得出的预测结果中方法。

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