Abstract: A shield machine is a kind of special engineering equipment which is used for
underground construction such as tunnel excavation. For the high complexity of the tunneling
equipment, the security problems are taken due to the uncertainties of geological and working
conditions. A web-based interactive assembly, motion simulation and virtual roaming system is
developed with VRML, Cult3D, HTML, etc., which has the functions of navigation roaming,
interactively manipulating virtual object, information inquiries, and so on. It can visually show the
construction and principles of shield machine, and provide a good platform for operating the
shield machine.

Key words: computer application, shield machine simulation system, interactivity, Web3D