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Depth of groundwater table is unknown

Sam — Sat, 30 Oct 2021 12:14:32 GMT

Hello everyone!

I am trying to conduct the flow-deformation analysis for slope stability assessment under transient boundary conditions. However, the problem is that at the study site, we do not know the depth of the groundwater table. We are assuming that the groundwater table is quite deep based on the fact that there was no evidence of groundwater at the landslide when it occurred. Can anyone please suggest the best way to tackle such a situation?

Thank you in advance.

Best Regards,

Sam

Water level

Sam — Sat, 05 Jun 2021 10:16:41 GMT

Hi,

I am trying to model a hypothetical case of stability of an embankment subject to river water level fluctuations. As can be seen in the picture attached, I had assigned an external water level (AB) approximately 2 m above the toe of the embankment. However, PLAXIS automatically considers the water level to be continuous to the far end in the right (BC), but this is not what I am looking at. Could you please suggest why PLAXIS considers the water level to be continuous (up to point C)? Is there a way to create a model with water level (AB) only?

Thank you in advance.

Best Regards,

Sam

Fully coupled flow-deformation analysis.

Sam — Thu, 27 May 2021 16:07:51 GMT

Hi,
I am trying to analyse the effect of transient infiltration on slope stability. As an initial condition to generate pore water pressure, I applied a small flux for a long duration (about 5 years) until the changes in pore water pressure became negligible (steady-state). However, in the next stage, when I conducted a fully-coupled analysis, there is an increase in suction even when there is no flux at the surface boundaries. I was assuming that there should be no changes in pore water pressures once a steady-state condition is reached. But it looks like I have been mistaken. If you could clarify this for me, it would be greatly appreciated.

Thank you in advance.

Fully coupled flow-deformation analysis

Sam — Fri, 27 Nov 2020 05:55:44 GMT

Hi, I am trying to model infiltration using flow-deformation analysis. I was wondering if the first time step or the minimum and maximum time steps can affect how flux is applied? Could anyone kindly suggest please?

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Fri, 27 Nov 2020 05:56:19 GMT

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