ABSTRACT
In the context of underground construction projects, the knowledge of the urban subsoil is of major importance. This article focuses on the development of a 3D geostatistical modelling of the pressuremeter tests applied on a section of the Grand Paris Express. The spatial variability of the geotechnical behavior is studied through a comparison between deterministic geostatistical methods: ordinary kriging and collocated cokriging. They both give quite similar results but collocated cokriging is definitely more accurate. This study also shows that large-scale underground projects are an ideal setting for the application of such 3D modelling.
