Multiobjective Optimization of Safety Risk of Prefabricated Building Construction considering Risk Correlation

Table 1

Risk factors and various data for PH prefabricated construction project.

Primary index	Secondary index	Risk weight	Risk accident rate	Risk control cost (10,000 yuan)	Loss from risk (10,000 yuan)
Personnel risk factor	Man-machine mixed operation	0.016	0.53	0.95	24.25
	High-altitude operation	0.035	0.69	3.12	25.60
	Fatigue construction caused by high-intensity operation	0.019	0.55	2.22	7.65
	Illegal operation by builders	0.053	0.61	1.90	12.30
	Lack of professional technicians	0.033	0.54	0.92	17.95
	Poor quality and weak safety awareness of personnel	0.011	0.43	1.35	25.80
Mechanical risk factor	Improper operation, maintenance, and safety inspection of equipment	0.056	0.48	1.15	34.45
	Unreasonable selection and layout of transporting, hoisting, and grouting equipment	0.037	0.33	2.87	6.25
	Equipment failure, aging	0.074	0.63	2.82	12.70
Material risk factor	Unqualified safety protection items related to construction	0.078	0.59	4.62	28.70
	Nonstandard building materials used in the construction	0.050	0.46	4.22	21.80
	Arbitrary stacking of construction materials	0.039	0.32	2.12	9.30
Environmental risk factor	Narrow working surface, insufficient lighting	0.071	0.36	1.97	12.80
	Improper protection measures for borders and openings	0.066	0.45	1.30	16.80
	Presence of hazardous sources like charged high-voltage wires and underground gas pipelines around the construction site	0.016	0.29	2.45	34.90
	Awful weather	0.014	0.31	1.80	18.25
Technological risk factor	Defects in safety protection and management technologies such as temporary support system	0.066	0.58	2.62	11.30
	Defects in construction technologies such as hoisting equipment attachment measures	0.056	0.39	1.47	6.75
	Defects in construction techniques such as prefabricated component assembly and key part processing	0.045	0.64	0.82	22.95
Management risk factor	Lack of relevant safety education or training	0.066	0.54	1.87	29.80
	Mismatch between the safety management system and actual construction conditions	0.026	0.49	1.60	14.45
	Lack of unified, effective management standards or supervision mechanism	0.032	0.58	3.55	49.35
	Improper multiparty coordination management during construction	0.043	0.61	2.80	32.65