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首页> 外文期刊>Tunnelling and underground space technology >Application of the NATM method in the road tunneling works in difficult geological conditions - The Carpathian flysch
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Application of the NATM method in the road tunneling works in difficult geological conditions - The Carpathian flysch

机译：NATM方法在困难地质条件下的公路隧道工程中的应用-喀尔巴阡山脉

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The paper presents the characteristics of geological, geotechnical and construction conditions in the Laliki tunnel in Carpathian flysch. Until now, it is the only tunnel constructed there; yet, another one is underway, and several more are in the design stage in Poland and Slovakia. Therefore, the experience gained during construction of this tunnel using NATM method are extremely important from the point of view of further tunneling works. The analysis has shown that the flysch formation met in Laliki is different from e.g. in Greece which is better known from tunneling. The changes in geological and engineering conditions along the tunnel, mainly in dip of rock layers, approximately between 70 and 85 degrees, and a varying lithology, led to diversification of the quality of the rock mass and its different evaluation on the design and tunnel execution stages. Changes observed in the rock mass quality have forced the contractor to apply a primary support with a higher load-bearing capacity, i.e. using micropile umbrella system, which was not planned before. The determined RMR, GSI and KF (Polish classification of the Carpathian flysch) rock mass quality indices shown significant discrepancies that proves high subjectivity of the methods in the condition of flysch formation. Simultaneously, the analysis has shown that KF classification can be applied in flysch rock mass successfully, together with RMR and GSI classifications.
机译：本文介绍了喀尔巴阡山脉的拉里奇隧道的地质，岩土和施工条件的特征。到目前为止，它是在那里唯一建造的隧道。然而，另一项正在进行中，波兰和斯洛伐克的其他几个正在设计阶段。因此，从进一步的隧道工程的角度来看，使用NATM方法建造该隧道的经验非常重要。分析表明，在拉利基遇见的粉煤灰形成不同于例如拉希奇。在希腊，这从隧道技术中比较知名。沿隧道的地质和工程条件的变化，主要是在大约70至85度之间的岩石层倾角变化以及岩性的变化，导致了岩体质量的多样化以及对设计和隧道实施的不同评价阶段。观察到的岩体质量变化迫使承包商使用具有更高承载能力的主要支撑，即使用以前未计划的微型桩伞系统。所确定的RMR，GSI和KF（喀尔巴阡山脉粉尘的波兰分类）质量指数显示出明显的差异，这证明了粉尘形成条件下该方法具有较高的主观性。同时，分析表明，KR分类可以与RMR和GSI分类一起成功地应用于飞石岩体中。

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