Experimental Study on Bending Moment of Double-Row Steel Pipe Piles in Foundation Excavation

Table 1

Physical and mechanical properties of subsoil.

Layer number	Name of soil layer	h (m)	ρ (g·cm^−3)	φ (°)	γ (kN·m^−3)	c (kPa)
1	Fill	1.8	1.8	15.0	18.0	10.0
2	Silty clay	1.4	2.0	20.0	20.0	20.0
3	Coarse sand	2.5	2.0	35.0	20.5	7.0
4	Granite	0.5	2.5	50.0	25.0	6.0
5	Lamprophyre	2.8	2.4	42.0	24.0	6.0
6	Cataclasite	15.2	2.6	55.0	26.5	6.0
7	Granite	16.5	2.6	65.0	26.0	4.0