Volume 55, Issue 5 p. 712-721
Research Paper/

An Analytical Method for Groundwater Inflow into a Drained Circular Tunnel

by Kai Su

Corresponding Author

Kai Su

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan, 430072 China

Corresponding author: State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan 430072, China; +86 138 86041751; fax: +86 027 68772310; [email protected]Search for more papers by this author
Yafeng Zhou

Yafeng Zhou

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan, 430072 China

Changjiang Institute of Survey, Planning, Design and Research, Changjiang Water Resources Commission, 1863 Jiefang Avenue, Wuhan, 430010 China

Search for more papers by this author
Hegao Wu

Hegao Wu

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan, 430072 China

Search for more papers by this author
Changzheng Shi

Changzheng Shi

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan, 430072 China

Search for more papers by this author
Li Zhou

Li Zhou

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 299 BaYi Road, Wuhan, 430072 China

Search for more papers by this author
First published: 22 March 2017
Citations: 39
Article Impact Statement: A semianalytical formula is proposed to provide a better prediction of the tunnel inflow.

Abstract

Groundwater inflow estimation is essential for the design and construction of tunnel and the assessment of the environmental impacts. Analytical solutions used in current engineering practice do not adequately account for the effect of the excavation-induced drawdown, which leads to significant change in pore water pressure distribution and reductions of the water level beyond tunnel. Based on the numerical analysis results, this article proposes semianalytical method to predict the height of lowered water level and groundwater tunnel inflow. The tunnel problem is conceptualized as two-dimensional flow in a plane perpendicular to the tunnel axis. The analytical formula, considering the effect of the excavation-induced drawdown, provides a better prediction of the tunnel inflow compared to the existing analytical formulas, even for the cases with inclined groundwater level.