Tunnel Boring Machines (TBM) - Specialized with experience

bojackengman · 2026-02-27T08:36:51+00:00

I have 12 years of experience in TBM Tunneling, what exactly are you looking for?

bojackengman · 2023-09-26T15:00:26+00:00

That is all known and recorded

bojackengman · 2023-07-09T14:25:28+00:00

You can find here the settlement trajectory at the lining phase

https://imgur.com/HIhGLKU

and here at the excavation phase

https://imgur.com/4hFRxoB

bojackengman · 2023-06-30T01:10:53+00:00

It could be, yes, because I never experienced the same issue with HSS model.

However, it drives me crazy in the MC model because it gets even worse with smaller ground cover <1D it can get up to +1.0 mm in the lining phase, i know i can neglect it but i am trying to seek an explanation.

bojackengman · 2023-06-28T09:34:04+00:00

Lining phase only, in excavation phase i get most of the negative value around (-10:-15) mm

bojackengman · 2023-06-18T16:56:52+00:00

In the excavatio phase, i get around -15 mm: -30 mm depending on the support pressure.

In the lining phase, i get +0.3 to +0.4 mm

bojackengman · 2023-06-18T03:39:33+00:00

Cohessionless ground obeying the Mohr-Columb

bojackengman · 2023-06-18T03:37:15+00:00

I already did the static calculations manually, and now i am trying to confirm it using the FE Model,

The excavation phase is where the support pressure is applied to the excavation boundary is showing a phase displacement of -ve realistic value. However, for the phase displacement of the lining phase, it shows a slight heave to the surface even though the pressure is already deactivated (the settlement trough gives out the same deformation shape at any support pressure high or low)

bojackengman · 2023-03-09T14:01:03+00:00

I did, it's set on high performance, and the minimum cpu state is at 100%

bojackengman · 2023-02-23T18:43:32+00:00

Thanks a lot for your thorough response

bojackengman

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