This study presents a Ground Lining Interaction (GLI) model to consider the deterioration of primary supports and realistic ground conditions in evaluations of accurate New Austrian Tunnel Method (NATM) tunnel loads acting on concrete linings. Several parametric studies of the major parameters that influence tunnel loads are performed and the results are compared with Terzaghi's formula. Numerical results demonstrate that the proposed GLI model is capable of reducing excessive tunnel loads by up to 30%. Based on the obtained results, a simplified GLI formula that can be used in engineering practice is proposed for NATM tunnel loads on concrete linings.
Bibliographical noteFunding Information:
The author (M. Varalakshmi) is grateful to acknowledge University Grants Commission [RGNF, F1-17.1/2011-12] for financial support under which this research was carried out. Author would like to thank DST-PURSE Centre, Sri Venkateswara University for evaluating the antimicrobial activity.
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering