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

Table 1

The single-factor orthogonal test scheme.

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