Physical and numerical modelling of single tunnels under static loading conditions

The continuous development of cities caused a deficiency of land in metro regions which arises various transportation problems. The construction of underground structures is extremely effective in solving these problems, as they have solved various traffic issues in significant urban areas. The main objective of the present study is to evaluate the extent of deformation experienced in single tunnel under the effect of static loading. In the present study, the extent of deformation is measured with the help of experimental investigation. Various single tunnel models are prepared in laboratory. The strength characteristic of the rock is varied and the cover depth of the tunnel models also varied as 30 mm and 50 mm. In case of lined samples, liner material is also introduced. The results obtained from physical modelling are further compared with the numerical modelling using ANSYS software. From the results, it can be concluded that the physical and numerical modelling results are in good agreement with each other. It is also observed that if the parameters are well selected for physical and numerical analysis, it can be an easy and less time-consuming method for finding out strength and deformation behavior for analysis and design of the tunnel. Therefore, it can be concluded that this methodology can be used for the safe and economical design of tunnels that are subjected to static loading conditions.