Construction Safety Risk Assessment of Large-Sized Deep Drainage Tunnel Projects

Table 1

HHM framework of LSDDTP construction safety risk.

Dimensions	Loss	Unit	Source	Safety accidents types
Primary index	Loss of life	Design unit	Men	Object against	Fall
	Loss of property	Construction unit	Mechanical	Collapse	Fire
	Loss of environment	Owner unit	Material	Water permeable	Electric shock
	—	Government	Method	Explosion	Mechanical injury
	—	Other units	Environment	Poisoning and suffocation	Other injuries
Dimensions	Risk characteristics	Causes of risk	Control error	Construction unit
Primary index	Danger	Initial accident	Management level	Main sewage tunnel project
	Exposure
	Vulnerability	Secondary accident	Operation level	Shaft project
	Adaptability