Table. 1 Lining materials and prototype mechanical parameters.

From: Mechanical response characteristics of large-span double-arch tunnel construction and eccentric loading effect on the partition wall

Materials

Uniaxial compressive strength Rc (MPa)

Modulus of elasticity E (GPa)

Poisson’s ratio μ

C30 concrete

Prototype

20.1

30

0.2

similarity

0.402

0.6

0.2

C25 concrete

Prototype

16.7

28

0.2

similarity

0.35

0.572

0.2

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