Study on Environmental Effects Induced by Quasirectangle Shield Tunnelling with Analytical Stiffness Matrix

Table 2

Main physical and mechanical properties of the soil layer.

No.	Soil layer	Soil thickness = /m	Gravity/KN·m3	Compression modulus/MPa	Poisson’s ratio	Static side pressure coefficient K0
1	Miscellaneous soil	1.50	18.0	3.41	0.38	0.60
2	Sludge	1.70	16.4	1.65	0.42	0.72
3	Clay	0.80	18.3	3.15	0.37	0.63
4	Sludge	4.40	16.5	1.63	0.42	0.72
5	Sludge-clay	8.40	17.2	2.02	0.40	0.67
6	Silt-clay	3.70	18.3	3.03	0.32	0.47
7	Sludge-silt-clay	7.30	18.0	2.84	0.35	0.54
8	Clay	5.70	17.4	3.87	0.35	0.55