TUNNELING

Ground Freezing For Shoring And
Groundwater Cutoff
Shallow Excavations
Shallow Excavations—Small Site
Shallow Excavations—Large Site
Deep Excavations
Groundwater Cutoff Wall

• Provides stable shoring to allow tunneling in wet, loose soils or fractured bedrock.

• Effective for cutting off ground water into tunnel excavation.

• Frozen soil/rock can be used as shoring around unfrozen soil or the entire soil/rock mass can be frozen. In the latter case, a hard-rock type tunneling machine cuts through frozen ground that is consistently hard, unlike wet unfrozen material.

• Frozen soil shoring can also be used to stabilize ground entrance and exit access shafts.