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Hello, yes you are right! I've solved my problem changing the model property. You know that in tunnelling with tbm there is always a loss of volume because the excavation diameter is major than the lining external diameter. In my model i filled that volume with a grout that is completely in...

yes, I only wrote wrong on my previous post. But in every case an higher density could only help my analysis.

Hello, I'm grateful to you because I read all your usefull posts for my work. So, I'm modelling a classical 3d step by step excavation of a circular shallow tunnel with concrete lining installation after the tbm moving step. All of this happens in a non cohesive soil wich is set up in abaqus...