Serial number

Content

1

Analysis of initial seepage field

2

Initial stress field equilibrium

3

Slope excavation, and shotcrete

4

Construction of enclosure structure

5

The first precipitation is 2.4 m below the ground

6

Excavate 1 to 1.9 m below the ground and erect the first inner support and crown beam

7

The second precipitation is 4.2 m below the ground

8

Excavate 2 to 3.7 m below the ground

9

Third precipitation to 6 m below ground level

10

Excavate 3 to 5.5 m below the ground and erect the second inner support and waist beam

11

Fourth precipitation 8 m below ground level

12

Excavate 4 to 7.5 m below ground level

13

The fifth precipitation to 10 m below the ground

14

Excavate 5 to the bottom of the foundation pit