Table 5 The maximum surface settlement in each construction stage.
Construction stage | Surface settlement (mm) | |
|---|---|---|
3 | Excavate the first soil layer | 3.26 |
4 | Erect the first support | 4.58 |
5 | Excavate the second soil layer | 7.71 |
6 | Erect the second support | 10.88 |
7 | Excavate the third soil layer | 14.73 |
8 | Erect the third support | 16.69 |
9 | Excavate the fourth soil layer | 19.79 |
10 | Erect the fourth support | 21.95 |
11 | Excavate the fifth soil layer | 22.63 |