I am currently engaged in a geotechnical simulation within Plaxis 3D, focusing on an irregularly shaped excavation that necessitates the installation of ground anchors in three rows. My model geometry has been meticulously prepared, ensuring a minimum Mesh Quality of 0.3, and I am utilizing Plaxis 3D Version 20 (V20).
My primary concern arises during the activation of the 1st Stage Ground Anchors and the subsequent calculation process. Specifically, I have observed two significant issues:
Stiffness Parameter Reduction: Upon activating the 1st Stage Ground Anchors, I encounter an unexpected behavior where the stiffness parameters (when running this particular stage) within my model decrease significantly.
Slow Progression of Delta M Stage: Simultaneously, I have noted a notably slow progression of the Delta M Stage value. This slow pace impedes the timely completion of the simulation.
To address these concerns, I have attempted to mitigate the issue by reducing the number of ground anchors activated at any given time to just two. However, the problem persists.
My model employs the Hardening Soil (HS) Small Model, which is typically effective for such simulations.
I would greatly appreciate insights, guidance, or suggested strategies from experienced members of the community to overcome these challenges. Any recommendations to enhance the convergence, stability, and efficiency of my geotechnical simulation, especially in the context of multiple ground anchors and complex geometry, would be highly valuable.
Thank you for your expertise and assistance.
Best regards,