Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Material properties of soil and tunnel segments.
| Material | Density (kg/m3) | Elastic modulus (MPa) | Poisson’s ratio | Cohesion (kPa) | Friction angle (°) |
|---|---|---|---|---|---|
| Muddy soil | 1650 | 5 | 0.42 | 16 | 5 |
| Silty sandy soil | 2000 | 20 | 0.35 | 13 | 29 |
| Tunnel segment | 2500 | 35e3 | 0.2 | - | - |
| Grouting body | 1900 | 20 | 0.32 | - | - |
