For example, when we finish a NATM Tunnel Analysis, how to find the Support Pressure at the end?

I am doing a NATM Tunnel Analysis in Plaxis 3D, but when everything is finished and the calculations are given, it shows a problem in phase 01 like this. (Soil body seems to collapse. Please inspect Output results. [Error code: 101] ) What is the reason…

Hello, I am running a dynamic analysis model in Plaxis to find a vertical displacement of the pipeline in liquefiable soil, but it takes one day and is still running in 11.21 seconds. Is it normal for this kind of analysis in Plaxis? If so, anyone could…

Hi All, I have been modelling tunnel construction longitudinally. For the support, I have to modelling face bolt as pre support system. Since there is no face bolt structure option, is anyone knowing how to model face bolt in PLAXIS 2D and defining…

suppose I am using 25 kN/m3 of unit weight of concrete and the unit weight of soil is 19kN/m3 and modelling lining as a plate element. Should i subtract the unit weights and multiply with the thickness?

Hello, I modeled a tunnel of 2.5 m in the soil layer. In the calculation result at the lining stage voids are created around the pipe. How can I remove these voids? what is the reason behind this phenomenon? Many thanks for your help.

I have to model an existing tunnel and perform the analysis under seismic loading. What will be the phases for staged construction in PLAXIS 2D?

I’m interested in modeling a deep tunnel. When I activate the embedded beams rows, the Mstage remains constant but displacements continue to evolve.

I am modelling a TBM-bored tunnel in Plaxis 2D, and in order to obtain a more percise stress field in the segmental lining in the zones of contact between segments, I have decided to model the tunnel lining as "soil" elements with the corresponding material…

Hi all, First question here :) For a project I'm working on I am modelling a set of access tunnels used to allow construction of an underground structure (in PLX 3D 22.02). Starting out from an initial 2D project which works well I tried extending the…

Hi all, I was modelling the volume expansion (due to temperature change) by inputting the volume strain of material directly. But when I consider the tunnel, I cannot input the volume strain value to the lining ( plate material), so it shows the wrong…

Dear Ladies and Gentlemen! I want to model a NATM Tunnel with a pilot Tunnel in Plaxis 3D. At first a pilot Tunnel has to be build over the whole length. After this the "normal" tunneling starts. Tunnel sequencing: 1xheading with demolition…

Dear Stefanos and Team, I am using Plaxis 2D V21. I am currently trying to re-do Tutorial 7 (Excav. of an NATM Tunnel) through Python remote scripting. I would like to perform the "extendtosymmetryaxis" and "symmetricclose" command through python…

Dear Support Team/Plaxis We are using Plaxis 2D version 20.04. Got some questions for modelling the HDD installation using line contraction. In two scenarios, the volume loss will be 50% and 100% (full collapse), so we set Cref=volume loss=50% for…

Hi, I am a rock engineer getting started with Plaxis. As many rock engineering people I am more familiar with the Rocscience package but I am starting to see great potential on PLAXIS. In the Rocscience package there was a possiblity to model gravity…

Dear Soilvision Forum, I'm currently working on my diploma thesis and I'm modelling compensation grouting above a NATM tunnel. The tunnel is only a part of the thesis to cause settlements for the compensation grouting. After a preheaving phase the…

Dear Sirs, I want to model a tunnel constructed in the NATM with PLAXIS 3D. For example, the excavation for the bench should have twice the length of the excavation for the Top-heading, or the excavation of the heading should be like this: one meter…

Hi all, We are facing to a inner reinforcement tunnel design in order to minimze tensions in existing plain concrete lining. So, we have a plaxis 2d model where existing linning is modeled as a soil volume (elastic model) and future reinforcement as…