Influence of Lightweight Foamed Concrete as Backfill Material on Stress and Deformation of Buttressed Earth-Retaining Wall

Table 8

Results of the point of resultant force by multiple-factor orthogonal tests.

Test number	Overload (MPa)	Density of lightweight foamed concrete (kg/m^3)	Replacement thickness of lightweight foamed concrete (m)	Point of resultant force (m)
2-1	14	600	0.22	0.130380918
2-2	14	700	0.28	0.193842579
2-3	14	800	0.40	0.141944335
2-4	16	600	0.28	0.191728314
2-5	16	700	0.40	0.141691374
2-6	16	800	0.22	0.13069862
2-7	18	600	0.40	0.144787266
2-8	18	700	0.22	0.134576483
2-9	18	800	0.28	0.131036786
	0.155389277	0.155632166	0.13188534	—
	0.154706103	0.156703479	0.17220256	—
	0.136800178	0.134559914	0.142807658	—
	0.018589099	0.022143565	0.04031722	—