Abstract
In order to confirm the validity of liquefaction countermeasures selected for the integration of roads and housing in an existing housing area, three dimensional FEM analyses (LIQCA3D11) were conducted. The whole model in which all blocks are modeled is used in the case of taking measures by only main construction methods. The partial model that four housing areas are selected from all blocks is used in the case of taking measures by a combination of main and sub construction methods.The dewatering method and the grid-form deep mixing wells method were chosen as main construction methods in the whole model.It was confirmed that effects of the countermeasures of the grid-form deep mixing wells method are limited by the analysis of the whole model and it is most effective to set all blocks including just below the housing to the countermeasure region by analytical results of the partial model.
