When I excavate the highlighted mass in the following image, the model fails to analyse the data. Some one suggested to reduce the sigmaM stage parameter to 0.3. in that case model is working. however getting warning massage mentioned as "Prescribed ultimate state fully reached. Unfinished construction stage. Next calculation must be staged construction. [Warning code: 2]" Hence i feel its not correct to reduce sigma M stage. some one please help with the modeling approach.
Dear Sumit Wagh,
In principle using a SumMStage < 1 for tunnelling is only done to simulate the Beta-method. So it's not by definition wrong if you have prescribed beta values to use.See for instance this article on using the beta method in PLAXIS:NATM Tunneling - Beta Method: Incomplete Staged construction method vs. Deconfinement methodWith kind regards,
Dennis Waterman
Hi Dennis,
Thanks for you help. Article was useful to understand Beta method of modeling.