An Improved Numerical Model of Shield Tunnel with Double Lining and Its Applications

Table 2

Parameters of argillaceous siltstone strata in model and prototype.

Name	Cohesion /kPa	Internal friction angle ϕ/(°)	Model elastic quantity /MPa	Bulk density /(kN·m^−3)
The prototype stratum	22.0	23.5°	28	22.3
The model stratum	1.1	23.5°	1.4	22.3
Similarity ratio	1 : 20	1 : 1	1 : 20	1 : 1