The influence of fissured material on tunnel stability (a numerical study)

Purpose. To understand the effect of fissured material on tunnels. These infrastructure tunnels must be safe in all respects, including construction, materials, and more. One challenges which engineers face is need to consider types as well material. As a result, order ensure safety tunnel, it important for us anticipate possible precipitation, displacements, stresses strains caused by construction fractured environments. Methodology. The OPTUMG2 software was used thisnumerical study, tunnel modeled applying hypothesis two-dimensional plane deformation with use finite element method, model continuous media. Mohr-Coulomb criterium considered simulate elastoplastic nonlinear behaviour this model. Findings. ndings demonstrate that orientation weakness planes can have major impact stability. Thus, observed 45, 60 angle 1, 110, 135 second 2 present most critical situations. influence (soil) civil engineering projects such tunneling should taken into consideration. Originality. stability determined measuring displacement (settlement), stresses, deformation, under environment. In paper we simulated various crack angles. plane, angl3e 1 values are changed 0, 20, 65, 90, from 135, 155, 175, 180. Practical value. number constantly increasing. This because they development countries accelerating economic growth, shortening distances travel time linking urban areas natural obstacles mountains. We found first angle,