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首页> 外文会议>Geophysical Solutions for Environment and Engineering vol.1 >Application of GPR for forecasting geological disasters in tunnels
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Application of GPR for forecasting geological disasters in tunnels

机译：GPR在隧道地质灾害预报中的应用

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摘要

Ground-penetrating radar (GPR) is a relatively new electromagnetic advanced geological forecast technique that is gaining widespread use for mapping shallow subsurface geological structures and locating underground objects. GPR is a quick, continuous and non-destructive geophysical prospecting method. GPR data, based on accuracy of exploration and interpretation, excellence of resolution and capacity of mapping 3-D, can supply instructive purposes for design and construction of tunnels. During tunnel construction, unfavorable geological conditions in front of working face are difficultly clarified, due to limitation of geological survey and complexity of surrounding rock in tunnels. While digging tunnels, unfavorable geological structures such as faults, fracturing zones, weak interbedded layers and karst caves, often give rise to geological disasters like collapse and flood in some districts, and result in serious damages, delays, and thus economic losses. Accordingly, advanced geological forecast is far from being insignificant in process of excavation. In this work, the GPR data is conducted at Yeshanguan tunnel of Yi(YiChang)Wan(WanZhou)railroad. As a result, we can draw the conclusion by analysis of typical GPR profiles: application of GPR is relatively accurate and feasible for forecasting unfavorable geological structures in front of working face, and is important to safety of tunnel construction.
机译：探地雷达（GPR）是一种相对较新的电磁高级地质预报技术，已广泛用于绘制浅层地下地质结构和定位地下物体。 GPR是一种快速，连续且无损的物探方法。 GPR数据基于勘探和解释的准确性，出色的分辨率和3-D绘图能力，可以为隧道的设计和施工提供指导性目的。在隧道施工过程中，由于地质勘查的局限性以及隧道围岩的复杂性，很难弄清工作面前方的不利地质条件。在挖掘隧道时，诸如断层，压裂带，薄弱的夹层和喀斯特溶洞等不利的地质结构常常在某些地区引起地质灾害，例如坍塌和洪水，并造成严重的破坏，延误，从而造成经济损失。因此，在开挖过程中，先进的地质预报远非微不足道。在这项工作中，GPR数据是在宜（宜）万（万州）铁路的叶上关隧道进行的。结果，我们可以通过分析典型的GPR剖面得出结论：GPR的应用对于预测工作面前方不利的地质构造是相对准确可行的，对隧道施工的安全性至关重要。

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