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

Table 2

The multiple-factor orthogonal test scheme.

Test number	Overload (MPa)	Density of lightweight foamed concrete (kg/m^3)	Replacement thickness of lightweight foamed concrete (m)
2-1	14	600	0.22
2-2	14	700	0.28
2-3	14	800	0.40
2-4	16	600	0.28
2-5	16	700	0.40
2-6	16	800	0.22
2-7	18	600	0.40
2-8	18	700	0.22
2-9	18	800	0.28