Multi-Auger Deep Soil Mixing (DSM)
Deep soil mixing is an in-situ soil mixing technology that mixes existing soil with cementitious materials using mixing shafts consisting of auger cutting heads, discontinuous auger flights, and mixing paddles. The mixing equipment varies from single to six auger configurations depending on the purpose of the deep mixing. The soil-cement produced generally has higher strength, less compressibility, and lower permeability than the native soils.
The cementitious materials are generally delivered in grout or slurry form from ports in the cutting heads at the lower ends of the multiple shafts. Depending on the soil types and the purposes of soil-cement columns, the various shafts consist of mixing paddles or a combination of discontinuous auger flights and mixing paddles.
DSM is effective for liquefaction mitigation of seismically sensitive soil layers, foundation improvement under future structures, and in-situ stabilization of contaminated soils for environmental remediation, among other uses.
Proven Technology
Since its development in 1975 by the Port and Harbor Research Institute of the Japanese Ministry of Transportation, thousands of projects have been completed. It has also been proven effective for liquefaction prevention.
Environmentally Friendly
The drilling and mixing operation is low noise and low vibration and does not generate dust.
Reduce Construction Period
Soil cement gains strength, reduces compressibility faster than conventional soil improvement methods, and shortens the construction period.
Reliable in Strength Gain
Required strength can be obtained reliably by setting a proper cement dosage according to the soil conditions to be treated.
Computerized Operation System
The computerized operation system controls, monitors, and records the drilling rate, mixing depth, auger rotational speed, and grout injection rate. This operation system minimizes human errors and provides reliable soil-cement products as the design intended.
