Table 3 Foundation pit monitoring control value standard.

From: A collapse risk assessment method for subway foundation pit based on cloud model and improved Dempster–Shafer evidence theory

Monitoring Items

Early-warning value

Cumulative value

Rate of change

Surface settlement

24 mm

2.5 mm/d

Groundwater level

1.6 m

0.5 m/d

Horizontal displacement of wall top

24 mm

2 mm/d

Vertical displacement of column

12 mm

1.4 mm/d

Back to article page