Hello, we are trying to understand ground behavior in a tunnel excavation. We have run two models, the only difference is that the first one has soft soil from excavation axe to the surface, below axe is rock mass; the second one everything is soft rock. There is a face and lateral pressure applying on excavation surface. Unexpected, we get more convergences and totally different contour in the model with rock mass. Attached you can find outputs from FLAC3D.
Thank you for your comments.
I´ve changed material from “Fha-Rellenos_cohesivos” to “Qmk-Lama_del_Pacifico” but I still have the same problem.
If forces are taken out, high deformation occurs and calculation stops (large strain on). Here are the codes I am using, they are the same except for ground assignment. Effective_all_materials.dat (8.9 KB) Effective_only_Lama.dat (6.4 KB)
Changing OV-2-suelo_residual for QMK - lama del pacifico, we get same results, there are much more convergences in tunnel crown when part of the model is rock mass as seen in next plots.
Carlos, i can see less convergence in these new plots… you are having -1.69e-2 maximum displacement (vertical), while in the first ones you got 2.8e-1 (total)… can you unify the color scale?
also, i were looking at your code, and i saw that when you apply multiple materials, you also apply different stress field wich has a direct influence in the deformation process
