Safety Risk Evaluation of Large and Complex Bridges during Construction Based on the Delphi-Improved FAHP-Factor Analysis Method

Table 6

Risk source identification table established using the WBS-RBS method.

Project		Risk sources
		Human risk E1	Machine material risk E2	Environmental risk E3	Construction technology impact E4
Foundation pit engineering (A)	Foundation pit excavation A11	…	…	…	…
	Foundation pit support A12	…	…	…	…
Pile foundation construction (B)	Equipment transportation and installation B11	…	…	…	…
	Embedded casing B12	…	…	…	…
	Drilling with drilling machine B13	…	…	…	…
	Hole cleaning B14	…	…	…	…
	Hoisting reinforcement cage B15	…	…	…	…
	Underwater concrete pouring B16	…	…	…	…
Pile cap construction (C)	Boxed cofferdam C11	…	…	…	…
	Cofferdam hoisting C12	…	…	…	…
	Pile cap construction C13	…	…	…	…
	Formwork engineering C14	…	…	…	…
Other(D)	Construction electricity D11	…	…	…	…
	Fire prevention on-site D12	…	…	…	…