Intelligent Recognition of Safety Risk in Metro Engineering Construction Based on BP Neural Network

Table 2

Risk intelligent identification results.

Security risk classification	Rule coding	Risk description	Credibility
Construction technology risk factors	R1-2	Quicksand	0.7
	R1-27	Unstable steel structure of foundation pit	0.49
	R1-16	Unstable foundation pit retaining structure	0.19
Project characteristics risk factors	—	—	—
Geological and hydrological risk factors	R3-02	Harmful geological conditions	0.33
Risk factors of construction environment	R4-14	Leaks and cracks in underground pipelines	0.28