🎥 PLAXIS 2D Tutorial 7 – Dry Excavation Using a Tie-Back Wall (Step-by-Step)

Описание: 🎥 PLAXIS 2D Tutorial 7 – Dry Excavation Using a Tie-Back Wall (Step-by-Step)#tutorial #simulation #excavation #numerical #GeoAutoTools #Plaxis
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This tutorial reproduces Tutorial 7 from the official PLAXIS 2D Tutorial Manual: “Dry excavation using a tie back wall.”
The example demonstrates the dry construction of an excavation supported by prestressed ground anchors and concrete diaphragm walls.

⚠️ Disclaimer: This is not an official PLAXIS or Bentley Systems tutorial. It is an independently created educational walkthrough. All copyrights and trademarks belong to their respective owners.

📌 Why this tutorial is important:
✅ Demonstrates tie-back excavation support systems
✅ Shows detailed modelling of prestressed ground anchors
✅ Includes groundwater flow analysis for dry excavation
✅ Suitable for advanced geotechnical FEM users

📚 Tutorial Overview:
In this example, a dry excavation is constructed using concrete diaphragm walls retained by prestressed ground anchors.
To simulate dry conditions inside the excavation, a groundwater flow calculation is performed to update the pore pressure distribution during excavation stages.
This tutorial demonstrates how PLAXIS 2D allows for detailed modelling of ground anchors, including anchor geometry, installation stages, and prestressing.
Additionally, the tutorial explains how to evaluate contact stresses and internal forces, and how to scale results for clearer interpretation.

🧠 You will learn how to:
Model ground anchors in PLAXIS 2D
Apply prestressing forces to anchors
Generate pore pressure distributions using groundwater flow calculations
Display contact stresses and resulting forces
Scale and interpret graphical results

📐 Model Description:
Excavation width: 20 m
Excavation depth: 10 m
Retaining walls:
Concrete diaphragm walls
Thickness: 0.35 m
Length: 16 m
Ground anchors:
Two rows per wall
Total length: 14.5 m
Inclination: 33.7° (2:3)
Surface load (left side): 10 kN/m²

🌍 Soil Stratigraphy:
Fill (0–3 m): Loose fine sand
Sand layer (3–15 m): Dense, well-graded sand (anchor-bearing layer)
Loam (more than 15 m): Underlying soft soil layer

🧪 Validation:
✅ Matches the official PLAXIS 2D Tutorial Manual
✅ Accurately simulates dry excavation conditions
✅ Suitable reference for anchor-supported excavation design
🌐 For more advanced geotechnical FEM tutorials and automation tools, visit GeoAutoTools.com