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

Table 7

Results of resultant earth pressure by multiple-factor orthogonal tests.

Test number	Overload (MPa)	Density of lightweight foamed concrete (kg/m^3)	Replacement thickness of lightweight foamed concrete (m)	Resultant earth pressure (kPa)
2-1	14	600	0.22	2.23085
2-2	14	700	0.28	1.8886
2-3	14	800	0.40	1.8707
2-4	16	600	0.28	2.574295
2-5	16	700	0.40	2.31385
2-6	16	800	0.22	2.84595
2-7	18	600	0.40	2.59685
2-8	18	700	0.22	3.14125
2-9	18	800	0.28	3.46675
	1.996716667	2.467331667	2.73935	—
	2.578031667	2.4479	2.643215	—
	3.068283333	2.7278	2.260466667	—
	1.071566666	0.2799	0.478883333	—