Surface Settlement Damage Model of Pile-Anchor Supporting Structure in Deep Excavation

Table 1

Mechanical parameters of soil.

Name of the soil layer	Miscellaneous fill	Loess silt	Pebble soil	Silty clay	Fine sand	Silty silt	Pebble
Layer thickness	1.8	7.2	1.6	4.8	2.5	3.0	>8.2
Density	15	16	15	18	18	15	20
Friction angle	18	26	30	25	30	6	40
Cohesive force	10	18	0	19	4	10	0
Initial modulus of elasticity	23	25	34	28	59	18	172
Poisson’s ratio	0.2	0.26	0.21	0.28	0.22	0.32	0.27