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首页> 外文期刊>Japanese Geotechnical Journal >Applicability of the helicopter electromagnetic method to preventive maintenance control on expressway slope
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Applicability of the helicopter electromagnetic method to preventive maintenance control on expressway slope

机译：直升机电磁法在高速公路边坡预防性养护控制中的适用性

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In order to carry out the preventive maintenance control of expressway slopes, it is important to accurately understand the ground condition of slopes, followed by estimating the damaged area. Such ground condition is presently investigated by boring and/or physical prospecting on the slope surface. For the slopes widely distributed along expressways, however, a change of direction from the present corrective maintenance control to the preventive one is required. Therefore, it is indispensable that the critical slopes can be detected efficiently and economically. In this paper, an experimental investigation was carried out, applying the helicopter electromagnetic (HEM) method, by which the ground resistivity distribution of wide area can be detected, to some available expressway slopes. Based on the investigated data, the influence of the different prospecting techniques of HEM and the metal obstacles of slope reinforcements on the resistivity, and the estimation reliability of ground condition due to the resistivity were examined. As the results, it was confirmed that the ground condition of slopes can be understand effectively by the HEM prospecting data, especially detecting the areas of high volume water content. Finally, the applicability of HEM to the preventive maintenance control on expressway slopes was elucidated.
机译：为了进行高速公路边坡的预防性维护控制，重要的是准确了解边坡的地面状况，然后估算受损区域。目前通过在斜坡表面上进行钻孔和/或物理勘探来研究这种地面条件。然而，对于沿高速公路广泛分布的斜坡，需要从目前的纠正性维护控制向预防性维护的方向改变。因此，必不可少的是可以经济有效地检测出临界斜率。本文采用直升机电磁法（HEM）对一些可用的高速公路边坡进行了实验研究，该方法可以检测大面积的地面电阻率分布。基于调查数据，研究了HEM的不同勘探技术和边坡加固的金属障碍物对电阻率的影响，以及由于电阻率引起的地面状况的估计可靠性。结果证明，通过HEM勘探数据可以有效地了解斜坡的地面状况，尤其是检测高含水量的区域。最后，阐明了HEM在高速公路边坡的预防性养护控制中的适用性。

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