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Cased CFA

The main application for drilling with a Cased CFA is to build Secant Walls, as
opposed to diaphragm walls. The main advantages are:

  • Eliminates the need to use bentonite mud which is accompanied by the costs and inconvenience of large mud plants, handling, and dirt resulting in the work.
  • Improved accuracy of verticality, guaranteeing a maximum deviation 1.5%.
  • Quick and clean concreting. In underwater concreting of diaphragm walls, the concrete trucks are parked for a long time in difficult areas due to the time needed for this operation.
  • Eliminates need for service crane on the jobsite.
  • Best finish surfaces of the cuttings, because they are made with the casing which works as a mold.
  • Can be performed in smaller jobsites, and there is no spaced needed for bentonite mud mixers, pumps and tanks.
  • Soil disposal not contaminated by mud is much easier to discard.
  • Better sealing between the joints, as the piles are secant.
  • Significantly more productive than secant walls made with Kelly bar drill rigs.
  • Cost effective process when compared to either Grabs for diaphragm walls or Cased Kelly bar drilling for secant walls.
EK300LS
Standard Chassis: CAT 352 Tier IV  
Installed Power: 432 hp 322 kW
Maximum Diameter: 36 in 920 mm
Drilling Depth (Auger Only): 66 ft 20,200 mm
Casing Rotary Head Maximum Torque: 155,080 ft.lbs 21,500 kg.m
Auger Rotary Head Maximum Torque: 101,400 ft.lbs 14,000 kg.m
Operation Weight: 230,000 lb 104,500 kg
EK260LS
Standard Chassis: CAT 352 Next Gen  
Installed Power: 432 hp 323 kW
Maximum Diameter: 36 in 920 mm
Maximum Depth: 60 ft 18,200 mm
Operation Weight 200,000 lb 90,900 kg
EK240LS with auger
Standard Chassis: CAT 336 Next Gen  
Installed Power: 323 hp 242 kW
Maximum Diameter: 36 in 920 mm
Maximum Depth: 66 ft 20,200 mm
Casing Rotary Head Maximum Torque: 155,080 ft.lbs 21,500 kg.m
Auger Rotary Head Maximum Torque: 101,400 ft.lbs 14,000 kg.m
Operation Weight 180,000 lb 81,800 kg

CZM USA is a specialized foundation equipment manufacturer headquartered in Savannah, GA.

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