A Numerical Study of Ground Displacement and Stress Conditions of Small and Medium Circular Diaphragm Wall during Excavation

Table 3

Physical and mechanical parameters of soil layer.

The layer name	Layer no	γ(kN/m^3)	E(MPa)	C(kPa)	Φ(°)	Layer thickness range(m)	Layer thickness selection(m)	Earth pressure coefficient
Fill	①	18.5	2.1	15	16.2	1.5–4.5	3	0.56
Muddy clay	②	19.8	11.6	16	17.2	4.5–7.8	6.15	0.54
Silty soil	③	19.5	37.8	5	24.2	2.1–3.5	2.8	0.42
Totally weathered conglomerate	④	21.2	120	7	28.6	7.8–15.2	11.5	0.35
Strongly weathered conglomerate	⑤	22.5	135	34	38.5	7.8–15.2	36.55	0.23