Stage 5: Excavation underneath the ground level slab

1. Use the openings left in the ground level slab to excavate down to formation level (4.7 m) for the intermediate slab.
2. Commence pumping from dewatering wells.
3. Move plant into the excavation and continue under the ground level slab.
4. Place granular carpet over the alluvium in preparation for the pouring of the intermediate slab.
5. Provide ventilation under the slab.

6. ---

   Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 | Stage 6 | Stage 7 | Stage 8 | Stage 9