Effect of Subway Excavation with Different Support Pressures on Existing Utility Tunnel in Xi’an Loess

Table 1

Soil basic physical property index.

Soil layer	(kN/m^3)	(kPa)	(°)	Layer (m)
Soil 1	17	25	17	3
Soil 2	18.3	35	20	4
Soil 3	18.9	50	18	3
Soil 4	20.1	45	20	20