Research on Construction Safety Risk Assessment of New Subway Station Close-Attached Undercrossing the Existing Operating Station

Table 7

Index weight of construction safety risk assessment at all levels.

First-level index; (Weight)	Second-level index	Weight of second-level index	Third-level index	Weight of third-level index
A Existing subway station (0.5)	A1 Station structure	0.1599	A12	0.0630
			A13	0.1098
			A15	0.3005
			A16	0.5267
	A2 Track structure	0.4185	A22	0.2000
			A24	0.2000
			A25	0.6000
	A3 Power supply system	0.2625	A31	0.1667
			A32	0.8333
	A4 Water supply and drainage system	0.0618	A41	0.2000
			A43	0.8000
	A5 Ventilation and signal system	0.0973	A51	0.2389
			A53	0.5495
			A56	0.0650
			A57	0.1466
B New subway station (0.5)	B1 Construction monitoring of existing station	0.3543	B11	0.2295
			B12	0.3305
			B14	0.1040
			B16	0.0444
			B17	0.0444
			B18	0.1557
			B19	0.0684
			B110	0.0231
	B2 New space enclosing structure	0.1587	B21	0.1667
			B23	0.8333
	B3 Engineering dewatering	0.0676	B31	0.2000
			B33	0.8000
	B4 Foundation pit excavation	0.0448	B42	0.6667
			B44	0.3333
	B5 Surrounding rock and soil mass and surrounding environment	0.1036	B51	0.1556
			B52	0.0623
			B53	0.0623
			B54	0.0997
			B55	0.2375
			B58	0.3523
			B59	0.0304
	B6 Construction technology management of main structure	0.2399	B61	0.3777
			B62	0.0916
			B63	0.0916
			B65	0.1528
			B66	0.2449
			B67	0.0413
	B7 Green construction	0.0312	B72	0.0533
			B74	0.1351
			B75	0.3371
			B76	0.0829
			B77	0.2205
			B78	0.1351
			B79	0.0362