Effect of Size on the Stability of Narrow Foundation Pits

Table 3

Critical width of foundation pit under different working conditions (m).

Working conditions (H, D)	Range of B	Critical width (m)
		Antioverturning (theory)	Arc slip (theory)	Average of theoretical values	Simulation value
1: (H = 6, D = 3)	3∼7	4.28	6.25	5.27	5.37
2: (H = 8, D = 4)	4∼8	5.71	8.49	7.10	7.21
3: (H = 4, D = 5)	2∼8	7.14	7.42	7.28	6.36
4: (H = 6, D = 6)	3∼9	8.57	9.80	9.18	7.12
5: (H = 8, D = 7)	4∼12	10.00	12.12	11.06	10.22
6: (H = 4, D = 8)	2∼12	11.43	10.58	11.00	8.45
7: (H = 6, D = 9)	3∼13	12.85	13.08	12.97	9.49