Effect of Chromium Ion on the Strength Characteristics and Damage Law of Red Clay

Table 6

Variance analysis table of the degree of influence of each influencing factor on the peak deviator stress (taking into account the interaction effect).

Origin	Type 3 sum of squares	Degree of freedom	Mean square	The value of	Significance
Chromium ion concentration	105118.73	3	35039.58	150.64	Level I
Initial dry density	158814.29	2	79407.15	341.38	Level I
Confining pressure	40270.56	3	13423.52	57.71	Level II
	13096.71	6	2182.79	9.38	Level II
	3521.35	9	391.26	1.68	Level III
	8647.38	6	1441.23	6.20	Level III
Error	4186.96	18	232.61	—	—
Sum	1967219.00	48	—	—	—