Model Test and Back Analysis of Shield Tunnel Load Distribution in Soft Clay

Table 1

Similarity parameters of model test.

Physical indexes	Dimension	Similarity relationship	Similarity ratio
Geometry	L	CL	30
Load	FL^−2	CP = CL	30
Stress	FL^−2	Cσ = CF	30
Elastic modulus	FL^−2	CE = CP	30
Displacement	L	Cδ	30
Poisson ratio	1	Cμ	1
Water content	1		1
Volume-weight	FL^−3	Cγ	1
Strain	1	Cε	1