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

Table 6

Judgment matrix of the first-level index “Existing subway station (A).”

	A1	A2	A3	A4	A5
A1 Station structure	1	1/3	1/2	3	2
A2 Track structure	3	1	2	5	4
A3 Power supply system	2	1/2	1	4	3
A4 Water supply and drainage system	1/3	1/5	1/4	1	1/2
A5 Ventilation and signal system	1/2	1/4	1/3	2	1