[Retracted] Discovery and Discrimination of Bridge Engineering Safety Issues by BIM Virtual Scene Combined with Robotic Mapping

Table 4

Unsafe scenario characteristics of collapse accidents.

Category	Failure factors	Core key factors	Scenario problem characteristics
People	G1 illegal operation
	G2 management		F1 no support
	G3 blind command
	G4 unqualified construction		F2 blind slope release
		GH1 illegal operation	F3 uneven soil quality
		GH2 no support, support	F4 wall lost support
Object	H1 blind slope release	GH3 uneven soil quality	F5 illegal operation
	H2 no pit support	GH4 pit
	H3 uneven soil quality
	H4 loss of wall support