Monitoring System for Circular Deformation in Metro Shield Tunnels in Soft Soils

Table 2

Soil characteristics.

No.	Soil type	Thickness (m)	Weight (kN/m^3)	Static side pressure coefficient
1	Filling	1.55	19.0	—
2	Clay	1.7	18.3	0.49
3	Muddy silty clay	5.5	17.4	0.55
4	Muddy clay	5.8	16.5	0.58
5	Clay	1.7	17.6	0.51
6	Sandy silt	3.8	18.6	0.40
7	Clay	1.2	17.6	0.51
8	Silty clay	9.0	18.1	0.50