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在裂隙岩石中,可利用各种理论方法模拟地下水流。本文介绍了在修复瑞士Grisons的Rofla隧道排水系统中应用的几种模型方法。在该隧道中,必须采取措施防止碳酸钙从隧道混凝土衬砌中涌出,因为碳酸钙会阻塞现有排水管道,引起隧道内拱上岩石中的水压增大。在一段隧道上钻排水孔,并监测其对水压的影响。根据地质调查,建立不同的渗流模型以再现实测水压。然后,用这些模型预测作用在修复的隧道衬砌上的水压,并预测不同排水方案的效果而进行优选。最后,利用实测段的实测结果,探讨了预测精度。
In fractured rocks, various theoretical methods can be used to simulate groundwater flow. This article describes several model methods used to repair the Rofla tunnel drainage system in Grisons, Switzerland. In the tunnel, measures must be taken to prevent calcium carbonate from pouring out of the tunnel concrete lining, as calcium carbonate blocks the existing drainage pipe and causes an increase in water pressure in the rock in the arch of the tunnel. Drill a drain hole in a tunnel and monitor its effect on water pressure. According to the geological survey, different seepage models are established to reproduce the measured water pressure. These models are then used to predict the hydraulic pressure acting on the repaired tunnel lining and to predict the effectiveness of the different drainage schemes. Finally, using the measured results of the measured section, the prediction accuracy is discussed.