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Authors
Affiliations
1 Central South University, School of Civil Engineering, Changsha-410075, Hunan, CN
2 Zhengzhou Municipal Engineering Survey and Design Research Institute, Zhengzhou-450046, Henan, CN
3 Hunan City University, Yiyang-413000, Hunan, CN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 5 (2016), Pagination: 2089-2095
Abstract
To ensure the normal operation of the mountain tunnel with large burial depth and high water head, the water pressure of the tunnel lining should be accurately determined. The two-dimensional seepage around the tunnel meets Laplace equation, and the conformal variation theory is adopted to convert the free water surface of the underground water of the mountain tunnel and the periphery of the grouting circle into the circular ring with inner diameter of α and outer diameter of 1 in w plane. The universal solution of Laplace equation is obtained in the conformal variation circle area, and the analytical solution of the water pressure of the tunnel lining with steady seepage is deduced according to boundary condition and seepage continuity. Meanwhile, the analytical solution formula for the water pressure of the lining and the calculation software based on FLAC2d finite difference method are adopted to calculate the analytical solution and the numerical solution of the water pressure of Ying-shan-yan tunnel lining of Chengdu-Guiyang Passenger Transport Line. The comparison between above two solutions shows that the analytical solution has higher practicability and reference value for calculating the water pressure of the high-pressure water-rich karst tunnel lining.
Keywords
High-Pressure Water-Rich Karst Tunnel, Conformal Conversion, Water Pressure of Lining, Fluid-Structure Interaction.
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