Prediction of the loads on the ground anchors for the landslide by FEA

－Case study of the landslide that required additional ground anchor－

Abstract

  As a case of landslide with increased load of ground anchors, applicability of 2D elasto-plastic finite element method (FEM) was examined for load prediction of ground anchors after additional countermeasures. In the finite element analysis (FEA), we set the parameters of the ground based on inverse analysis, and then obtained the load of the ground anchors after the unloading work and adding the ground anchors. As a result, the load of the ground anchors after the additional countermeasures by the FEA showed values in the range of －17 to 5％ with respect to the measured value. This result suggests that the FEM model calibrated by inverse analysis using the load measurement value of the ground anchors may be used for rough estimation of load after additional countermeasures.