Effect of Size on the Stability of Narrow Foundation Pits

Table 4

Critical width of foundation pits when supporting piles are embedded in different depths (m).

The corresponding width of the two theories	Critical width of foundation pits when supporting piles are embedded in different depths (m)
	3	4	5	6	7	8	9
B QC (φ = 14.5°)	3.87	5.17	6.46	7.75	9.04	10.33	11.62
B QC (φ = 20°)	4.28	5.71	7.14	8.57	10.00	11.42	12.85
B QC (φ = 30°)	5.20	6.93	8.66	10.39	12.12	13.86	15.59
B HCmin	5.20	6.33	7.42	8.49	9.54	10.58	11.62
B SC (φ = 20°)	4.28	5.71	7.14	8.49	9.54	10.58	11.62
B GC (φ = 20°)	4.28	5.51	6.73	7.95	9.17	10.40	11.62