Disturbance Effect of Pipe Jacking Group Adjacent Excavation on Surrounding Soil

Table 1

Main geotechnical parameters of soils at the construction site.

Soil layer	Depths (m)	Water content (%)	Void ratio	Cohesion (kPa)	Internal friction angle (°)
①plain fill	0–3.98	30.4	0.865	27.9	16.8
②silty clay	3.98–6.58	25.03	0.81	14.91	15.42
③coarse sand	6.58–13.28			8