Volume 4, Issue 4, December 2018, Page: 75-82
The Effect of Groundwater Seepage on Stability of Tunnel by Using Strength Reduction Method Considering Fluid Solid Coupling
Zhaobing Zhang, School of Civil Engineering, Chongqing University, Chongqing, China; Key Laboratory of New Technology for Construction of China in Mountainous Area, Chongqing University, Chongqing, China; National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing University, Chongqing, China
Xiaoguang Jin, School of Civil Engineering, Chongqing University, Chongqing, China; Key Laboratory of New Technology for Construction of China in Mountainous Area, Chongqing University, Chongqing, China; National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing University, Chongqing, China
Yayong Li, China Construction Tunnel Corp., Ltd., Chongqing, China
Zhongya Zhang, School of Civil Engineering, Chongqing University, Chongqing, China; Key Laboratory of New Technology for Construction of China in Mountainous Area, Chongqing University, Chongqing, China; National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing University, Chongqing, China
Received: Dec. 2, 2018;       Accepted: Dec. 25, 2018;       Published: Jan. 22, 2019
DOI: 10.11648/j.ijtet.20180404.12      View  40      Downloads  13
Abstract
During the construction period of tunnels, groundwater seepage may lead to large deformation and even collapse of tunnel. To study the effect of groundwater seepage on stability of tunnel, the strength reduction method considering fluid solid coupling was employed to calculate safety factor of tunnel by using numerical simulation. Firstly, three working cases were established to investigate the effect of groundwater seepage and calculation mode on safety factor of tunnel. Then the fluid solid indirect coupling mode was adopted to investigate the relationship between safety factor and groundwater level. Numerical results show that safety factor considering groundwater seepage is about 20% less than that without considering groundwater seepage. Numerical results of two calculation modes are almost identical, but the computational time of fluid solid indirect coupling mode is far less compared with that of fluid solid coupling mode. Safety factor of tunnel linearly decreases with the increase of groundwater level, with the slope of 0.26. Moreover, tunnel crown settlement increases with the increase of groundwater level when the strength reduction factor is equal. Groundwater seepage is unfavorable to control tunnel deformation. In the watery zone, groundwater level should be lowered to improve stability of tunnel on condition that it does not seriously affect surrounding environment.
Keywords
Fluid Solid Coupling, Strength Reduction Method, Safety Factor, Groundwater Seepage
To cite this article
Zhaobing Zhang, Xiaoguang Jin, Yayong Li, Zhongya Zhang, The Effect of Groundwater Seepage on Stability of Tunnel by Using Strength Reduction Method Considering Fluid Solid Coupling, International Journal of Transportation Engineering and Technology. Vol. 4, No. 4, 2018, pp. 75-82. doi: 10.11648/j.ijtet.20180404.12
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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