v3.02.105 SSLP105 - Excavation of a circular tunnel in a linear elastic mass

Summary:

This test is an example of the implementation of a global methodology for the two-dimensional simulation of the digging and support of a circular gallery in an underground mass with Code_Aster.

To validate the approach on the basis of a simple analytical solution, we are required to make restrictive hypotheses about the geometry of the problem, the behavior of the materials (linear elastic) and the initial stress field (isotropic). The reference solution is given by the so-called « convergence-confinement » method, which is classical for this type of 2D modeling. For more details on the methodologies used, refer to the documentation [U2.04.06].

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Initial conditions, boundary conditions and loads
• 2. Benchmark solution
  • 2.1. Calculation method
  • 2.2. Reference quantities and results
  • 2.3. Uncertainty about the solution
  • 2.4. Bibliographical references
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Calculation process
  • 3.4. Tested sizes and results
• 4. B modeling
  • 4.1. Characteristics of modeling
  • 4.2. Calculation process
  • 4.3. Tested sizes and results
• 5. C modeling
  • 5.1. Characteristics of modeling
  • 5.2. Calculation process
  • 5.3. Tested sizes and results
• 6. Summary of results