Table 4 Material parameters.

From: Research on the combined control of tunnel deformation adjacent to the foundation pit by servo steel strut and capsule grouting

Type

Material

Element type

Constitutive model

E (GPa)

\(\gamma\)(kN/m3)

Poisson’s ratio

Diaphragm wall

C30

Plate element

Linear elastic

30

24

0.2

Concrete strut

C35

Beam element

Linear elastic

31.5

24

0.2

Servo steel strut

Q235

Point-to-point anchor bar

Linear elastic

206

78.5

0.32

Shield segment

C50

Plate element

Linear elastic

34.5

24

0.2

Waist beam/crown beam

C35

Beam element

Linear elastic

31.5

24

0.2

Capsule grouting32

–

Solid element

Non-porous elastic body

20

15

0.32