Centre de Recherches Pétrographiques et Géochimiques

Investigating tunnel seepage erosion and induced structural mechanical response using CFD-DEM-FEM method

Seepage erosion, induced by groundwater infiltrating surrounding soils through cracks between tunnel segments, poses a significant threat to the long-term stability of underground tunnels. However, the evolution of erosion and its influence on tunnel mechanical behavior remain in...

The parent bodies of Ryugu and Ivuna formed before those of other carbonaceous chondrites

Most carbonaceous chondrite (CC) meteorites contain abundant chondrules, millimeter-scale spherical inclusions of previously molten material. Ivuna-type carbonaceous chondrites (CIs) do not contain chondrules, nor do samples of the carbonaceous asteroid Ryugu. CIs and Ryugu share...