The Determination of the Tunnel Structure Loads Through the Analysis of the Interaction between the Void and the Support Using the Convergence-Confinement Method

摘要: The evaluation of the load acting on a tunnel support is fundamental importance for correct dimensioning structure when analytical calculation methods are used. depends various factors and this reason its can appear somewhat complex. One way evaluating to use convergence-confinement method. This process involves intersecting curve with reaction line. However, in order be able adopt technique, it necessary know radial displacement wall at point which installed. A technique presented study. based method Vlachopoulos Diederichs formulation estimation An iterative procedure has been introduced obtain final support. Application over 1700 representative cases typical conditions that encountered during excavation rock masses made possible graphs illustrate variations situ lithostatic stress. analysis results led considerations influence identify greatest those considered negligible.