Deep Soil Mixing

Various types of equipment can be used to perform deep soil mixing, but the technique essentially relies on mechanical means to create an in situ mixture of soil and grout. It can create continuous vertical barriers, reinforced if needed by the insertion of H Beams at preset intervals or it can form cells of treated soil to avoid liquefaction, to create gravity structures or to improve the overall characteristics of a soil mass.

Trevifoundations Kuwait offers two types of deep mixing: Turbojet and Dry Trevimix.

TURBOJET 

With the TREVIMIX-TURBOJET technique one obtains columns of consolidated soil and geometry defined by the tool’s dimensionswith in-situ mechanical mixing of the soil with the supply of a water-cement mixture injected at high pressure.  
Good results with the TURBOJET treatment are strictly dependent on the nature and composition of the soil in which the operation is being carried out. 

Operating specifications
The stabilizing agent is already introduced into the soil while drilling, as a stable water/cement mixture with the possible addition of additives. 
Separation and mixing of the soil is achieved by the combined action of mechanical tools, aided by a system of high pressure jets which convey the consolidating agent. 
The jets with their high kinetic energy promote the breakdown of material, optimizing the mixing and increasing the final quality of the soil-binder mixture, especially in terms of the consolidated section’s resistance and homogeneity.  

Technical data
Column diameter: 400 to 1500 mm; greater diameters can be used depending on the presence of particularly favourable soil.
Maximum depth of treatment: 25÷30 meters depending on soil diameter and consistency.


DRY TREVIMIX

This system, with the addition of dry powdered cement binder, requires soil with a high water content, which allows the setting reaction of the binder to completely develop. If the soil has insufficient water content, water must be introduced during the phase when the tool descends.

Operating specifications
The powdered stabilizing agent is introduced into the soil with nozzles located on the disintegrator. Normally emission occurs during the pull-up phase, with the use of dehumidified compressed air which pushes the binder through the hollow drilling rods. Emission of compressed air or water in the descending phase facilitates the tool’s penetration and prevents digging debris from obstructing the nozzles. 

Technical data
Column diameter: 400 to 800 mm
Maximum depth of treatment: 20÷25 meters depending on soil diameter and consistency.