Cement Deep Mixing (CDM) Method

Improvement Principle Solid
A method to harden the ground through chemical reaction by grouting the slurry-like cement type of improved material into the soft ground so as to mix the soil. In standard operation, the cement slurry is discharged from the bottom side of the mixer blade while the casing is being driven in.
Advantages Applicable to all kinds of soil such as sandy soil, cohesive soil and organic soil etc.
Able to select the specification (Improvement Type & Improvement Strength) in response to improvement objectives.
Vibration & noise is small.
Disadvantages Construction cost is high as compared to compaction method etc.
Unable to install work close to structure due to mechanical stirrer.
Need to dispose the upheaval soil as contruction work in progress.
Applicable Ground Mostly all types of soil such as sandy soil, cohesive soil, and organic soil etc.
Objectives Structural Foundation, Prevent Settlement, Prevent Slip Circle and Prevent Liquefaction
Improvement Effectiveness Cohesive Soil Increase Strength
Reduce Settlement
Suppress Shear Deformation
Sandy Soil Prevent Liquefaction
Reduce Settlement
Specification Pile Cross Section Area 1.5m²
Pile Arrangement
Block Type, Wall Type, Square Type, Pile Type
Improvement Rate 20% ~ 100 %
Penetration Depth Max GL -45m
Penetration Strength Max N-value < 15
Material Cement Slurry
Environment Vibration Small
Noise Small
Ground Displacement Comparatively Small