It mainly discusses the application of virtual reality technology to the conical roof lifting for the AP1000 nuclear power plant. By choosing the sketch-up and AutoCAD soft-wares, this paper established the 3d models of the conical roof and the 2600T Lampson crane in the manner of parameter. Based on virtual construction theory, these 3 d models were used to implement the simulation tests for the whole lifting progress in virtual environment so as to obtain optimized construction scheme and to train crane operator. And also the optimum running track for the crane is provided by the analysis, and the most economical enlargement plan for the 2600T Lampson crane landing pad is also provided.

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