Inverse modelling of groundwater flow around a large-scale underground cavern system considering the excavation-induced hydraulic conductivity variation

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• 作者：Jia-Min Hong^a ; Yi-Feng Chen^a ; ^{csyfchen@whu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Ming-Ming Liu^a ; Chuang-Bing Zhou^a ; ^b
• 关键词：Underground cavern system ; Inverse modelling ; Hydraulic conductivity ; Seepage control ; Fractured rocks
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：81
• 期：Complete
• 页码：346-359
• 全文大小：2731 K

文摘

This study proposed an inverse modelling procedure for evaluating the anisotropic hydraulic conductivity and its variation induced by excavation in fractured rocks by integrating a strain-dependent hydraulic conductivity model. The time-series measurements of both hydraulic head and discharge were used to construct the objective function for improving the reliability, which was solved with a combined method of orthogonal design, transient groundwater flow modelling, artificial neural network and genetic algorithm-based optimization for reducing the computational cost. The proposed methodology proves its effectiveness by successful inverse modelling of the groundwater flow around the underground caverns at the Jinping-I Hydropower Station.