Advances in Civil Engineering

Research Article

Field Observation and Theoretical Study on an Existing Tunnel Underpassed by New Twin Tunnels

Table 1

Laboratory penetration test and field steady flow test.
Soil layerLaboratory penetration test (cm/s)Field steady flow test (cm/s)
3–24.79 × 10−57.81 × 10−54.21 × 10−3
3–32.55 × 10−42.30 × 10−41.57 × 10−3
3–59.63 × 10−51.74 × 10−4—
3–63.29 × 10−43.01 × 10−4—
4–32.39 × 10−77.84 × 10−7/
6–12.06 × 10−73.03 × 10−7—
6–22.62 × 10−71.28 × 10−7—
8–11.88 × 10−75.11 × 10−7—