Table 1 Physical and mechanical parameters of the rock mass in the monitoring section.

From: Support mechanical response analysis and surrounding rock pressure calculation method for a shallow buried super large section tunnel in weak surrounding rock

Stratum

Elastic modulus (GPa)

Poisson's ratio

Cohesion (kPa)

Internal friction angle (°)

Density (kN m−3)

Residual soil

0.07

0.42

31

25.5

19.5

Tuff

0.52

0.26

113

27.3

25.7

Back to article page