Identification and Assessment of Subway Construction Risk: An Integration of AHP and Experts Grading Method

Table 18

Geological and natural risk list.

Itemized	Risk source	P	C	R
Adverse geological risk	The surface of the fill	2	3	6
	The soft soil	2	3	6
	Sandy cohesive soil	2	3	6
	Leakage, piping	2	4	8
Natural risk WE1H	Heavy rains	2	2	4
	The typhoon	1	3	3
	The earthquake	1	4	4