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http://dx.doi.org/10.7843/kgs.2006.22.10.5

Stress-Pore Pressure Coupled Finite Element Modeling of NATM Tunneling  

Yoo, Chung-Sik (Dept. of Civil & Environ. Engrg., Sungkyunkwan Univ.)
Kim, Sun-Bin (Dept. of Civil & Environ. Engrg., Sungkyunkwan Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.10, 2006 , pp. 5-20 More about this Journal
Abstract
This paper concerns the finite element (FE) modeling approach for NATM tunneling in water bearing ground within the framework of stress-pore pressure coupled analysis. Fundamental interaction mechanism of ground and groundwater lowering was first examined and a number of influencing factors on the results of coupled FE analysis were identified. A parametric study was then conducted on the influencing factors such as soil-water characteristics, location of hydraulic boundary conditions, the way of modeling drainage flow, among others. The results indicate that the soil-water characteristics play the most important role in the tunneling-induced settlement characteristics. Based on the results, modeling guidelines were suggested for stress-pore pressure coupled finite element modeling of NATM tunneling.
Keywords
Coupled analysis; Finite-element method; Groundwater; NTAM; Tunneling;
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