Plaxis 3D Tunnel Designer

Question

Dear Sirs, 
 I am working on Tunnel and Galleries example whilst using the Tunnel advancement tool. The tunnel has been excavated but the gallery doesn't seem to be excavated from the tunnel. Can you please advise how can I assign the start of the tunnel or what defines the start of the tunnel? 
 Many thanks

Stefanos Papavasileiou · Answer

Dear Nadeem, 
 From the screenshot, it is difficult to understand what is going on. 
 In principle, the start of the tunnel is the location where the insertion point is created for the Tunnel Designer. In Structures mode, this can be found in the Model explorer, under the Tunnels group, by expanding the tree of the relevant tunnel created. 
 If you need further assistance, please please submit a service request. 
 Then, one of our support engineers can help you in detail: https://apps.bentley.com/srmanager/ProductSupport

Stefanos Papavasileiou · Answer

Dear Nadeem, 
 In principle, you can simply deactivate any volume/surface generated from the tunnel in Staged construction, thus not affecting the calculation. Note that this needs to be done for each calculation phase that this is considered. 
 However, it is not clear via your message what the error is, therefore it will be easier to check your project directly. 
 Please submit a service request. Then, one of our support engineers can help you in detail: https://apps.bentley.com/srmanager/ProductSupport

Stefanos Papavasileiou · Answer

Dear Roumaissa, 
 The specific error you encountered is described in our Reference manual and it indicates a numerical issue encountered during the calculation. First you will need to inspect Output results to try and pinpoint the location of the issue. 
 In order to find out what the mechanism for failure is, and so possibly determining the cause, these Output plots should be inspected: 
 
 deformed mesh 
 total displacements (shaded plot) 
 incremental displacement (shaded plot and/or arrows) 
 total deviatoric strain (shaded plot) 
 incremental shear strains (shaded plot) 
 Plastic Points plot 
 when applicable: excess pore pressure plot 
 
 A combination of these plots will usually give insight into what is happening. 
 If you cannot explain the reason for this issue, please submit a service request: https://apps.bentley.com/srmanager/ProductSupport