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首页> 外文期刊>HYDRO Nepal: Journal of Water, Energy and Environment >Comparison between Predicted Rock Mass Classes and Actual Rock Mass Classes in Headrace Tunnel of Upper Mai Hydroelectric Project, Nepal
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Comparison between Predicted Rock Mass Classes and Actual Rock Mass Classes in Headrace Tunnel of Upper Mai Hydroelectric Project, Nepal

机译：尼泊尔上麦水电站引水隧洞预测岩体等级与实际岩体等级的比较

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摘要

This study involves comparison of predicted rock mass classes in design stage with actual rock mass classes of headrace tunnel of Upper Mai Hydroelectric Project. The total length of headrace tunnel is 2070.52 m. The lithology of the study area consists of gneiss, schistose gneiss and mica schist. The rock mass classifications, Q-system were used to predict rock mass classes during the design phase as well as for classify rock mass during excavation of headrace tunnel. The applicability and validity of proposed classification has been checked by comparing the prediction with actual observation after completion of excavation. It was found that the predicted classes does not exactly matches with the actual rock masses as a results effecting in construction time as well as in cost and economy of the project.
机译：这项研究包括将设计阶段的预测岩体类别与上麦水电站引水隧洞的实际岩体类别进行比较。引水隧洞的总长度为2070.52 m。研究区的岩性包括片麻岩，片岩片麻岩和云母片岩。岩体分类，Q系统被用于预测设计阶段的岩体类别，以及在引水隧洞开挖期间对岩体进行分类。开挖完成后，通过将预测结果与实际观察结果进行比较，检验了建议分类的适用性和有效性。结果发现，预测的等级与实际的岩体并不完全匹配，结果影响了施工时间以及工程的成本和经济性。

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