This twenty-fourth manual in the GEO5 engineering series focuses on the analysis of deformations and internal forces in an anchored sheet pile wall using the Finite Element Method (FEM). The manual guides users through the step-by-step process of modeling and analyzing the behavior of the sheeting wall during excavation stages, providing insights into stress distribution and structural performance. Available for download, this manual is an essential resource for geotechnical engineers involved in the design and analysis of retaining structures.

Learning Objective:

The goal of this manual is to teach users how to model and analyze an anchored sheet pile wall using the GEO5 FEM program. Users will learn how to simulate construction stages, apply geostatic and anchor forces, and evaluate the internal forces and deformations in the wall to ensure it meets safety and performance standards.

Assignment Description:

In this assignment, users are tasked with analyzing the state of stress and internal forces in an anchored sheet pile wall made from VL 503 interlocking piles, which is 10 meters high. The geological profile consists of silty sand and low plasticity clay. The analysis includes multiple construction stages: primary geostatic stress, soil excavation, anchor installation, and final excavation. The manual provides detailed instructions on setting up the model, defining contact elements, and interpreting the results for bending moments, shear forces, and displacements.

Outcome:

Upon completing this assignment, users will be able to accurately model and analyze the behavior of anchored sheet pile walls using GEO5 FEM software. They will gain practical experience in refining finite element meshes, using non-linear material models, and interpreting internal force diagrams to ensure the structural integrity of the sheeting wall.

Conclusions:

The manual concludes that the locally increased density of the finite element mesh in the vicinity of the sheeting wall leads to more accurate results for internal forces. The use of contact elements and non-linear material models is essential for capturing the true behavior of the wall and surrounding soil. The analysis identifies the maximum equivalent plastic strains, which indicate potential failure locations, providing crucial information for design and safety assessments.

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