Improvement of Bearing Capacity of Shallow Foundation on Geogrid Reinforced Silty Clay and Sand

Table 6

Ultimate bearing capacity comparison for all tests with respect to silty clay soil only (based on 10% footing width method).

Test no.	Test types	Ultimate bearing capacity (kN/m^2)	Percent (%) improvement in BC	BCR
1	Silty clay soil only	172.37	0.00	1.00
2	Silty clay soil and the top layer sand	184.34	7.00	1.07
3	1 geogrid in the interface of silty clay soil and sand layer	201.10	16.67	1.16
4	1 geogrid at the sand in two-layer condition	229.83	33.33	1.33
5	1 geogrid in between the sand and 1 geogrid in the junction of two soils	248.98	44.44	1.44
6	1 geogrid in between the sand, 1 in the junction of two soils, and 1 in silty clay soil, respectively	277.71	61.11	1.61
7	1 geogrid in between the sand, 1 in the junction of two soils, 2 in silty clay soil, respectively	296.86	72.22	1.72