Using the Information Quantity Method to Assess the Regional Risk of Highway Slope to Improve the Level of Risk Management

Table 3

Evaluation factor weight value.

Category of evaluation factors	Criterion layer	Weight value of criterion layer	Index layer	Weight value of indicator layer	Final weight value of indicator layer
Natural evaluation factor	Geometric factors B1	0.2857	Elevation F1	0.1000	0.0286
			Topographic slope F2	0.9000	0.2571
	Internal factors B2	0.5714	Distance from fault F3	0.0982	0.0561
			The types of rock and soil F4	0.3339	0.1908
			Relief degree F5	0.5679	0.3245
	External factors B3	0.1429	Distance from the river F6	0.1676	0.0239
			The average annual rainfall F7	0.7380	0.1054
			Terrain slope F8	0.0944	0.0135
Artificial evaluation factor	Geometric factors D1	0.2014	Slope excavation height F9	0.6667	0.1343
			Slope excavation angle F10	0.3333	0.0671
	Internal factors D2	0.6806	Slope deformation history and the present situation F11	0.6000	0.4084
			The compactness of soil slop F12/development degree of structure surface of rock slope F15	0.3000	0.2042
			Soil slope moisture state F13/rock hardness degree of rock slope F14	0.1000	0.0681
	External factors D3	0.1179	Surface drainage F16	0.1373	0.0162
			Underground drainage F17	0.2395	0.0282
			Degree of slope protection engineering diseases F18	0.6232	0.0735