Estimation of the Surface Displacement Field due to Construction of Cairo Metro Line El Khalafawy - St. Therese

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• 作者：Ezzeldine ; O. Y.
• 关键词：tunnels ; finite element ; settlement
• 刊名：Tunneling and Underground Space Technology
• 出版年：1999
• 出版时间：July - September, 1999
• 年：1999
• 卷：14
• 期：3
• 页码：267-279
• 全文大小：844 K

文摘

During the design stage of the Line 2 of the Greater Cairo Metro Project, a numerical study was carried out at the University of Alberta, Canada, in order to related the expected ground movement due to the tunnel construction to the ground control measures imposed during the construction process. A finite element analysis is carried out at the part of the line from Khalafawy to Saint-Therese Station. The study is based on the available documentary related to the ground conditions at the site and to the details of the construction method. The three-dimensional numerical model is constructed to emulate the most probable working conditions taking into account the excavation sequence. A non-linear stress-strain constitutive model is adopted to represent the ground surrounding the tunnel. The results are presented in term of the maximum displacement at the ground surface and the slope of the displacement trough.