In this talk, fi rst, a product model of shield tunnels, called IFC-ShieldTunnel, which was developed several years ago by us in Japan, will be presented by putting emphasis on conceptualization of shield tunnels, geometric modeling of soil layers, and implementation and visualization of instance fi les. Next, a product model for representing cut & cover tunnels will be presented. The motivation of modeling cut & cover tunnels is not just visualization and compatibility to various 3D CAD systems but for modeling and representing changes of constructed structures with the process model like 4D models. Finally, our on-going research on modeling degradation of reinforce concrete (RC) entities will be briefly introduced.


SFB837_Yabuki.pdf