Soil mixing is a cost effective ground improvement method that improves the characteristics of weak soils by injecting and blending cementitious grout with the native materials in-situ. To create a soil mixed wall, the in-situ soil mixed elements overlap each other and a structural steel pile is inserted for reinforcement.
CJA offers three different soil mixing technologies to provide the most economical option for the project 1) cutter soil mixing 2) multi-axis mixing
Cutter Soil Mixing (CSM) provides a cost-effective solution for constructing an impermeable retaining system by mixing soil in-situ with a cement/bentonite grout and installing the elements end to end. The elements are constructed through the cutting and mixing of native soils with an injected cement/bentonite grout via drums mounted on hydraulic motors. The in-situ soil cement elements are typically reinforced with a steel wide flange beam. CJA’s CSM walls are constructed using the latest soil mixing technology to ensure a high level of quality control through the use of down-hole steering. This ensures that our CSM walls are installed with the highest level of accuracy.
Multi-Axis Soil Mixing is a technique in which a drill rig advances drill steel with radial mixing paddles located near the bottom of the drill string to create in-situ columns known as cement deep soil mixing (CDSM). The radial mixing paddles mechanically cuts and blends the soil with injected grout. CDSM columns are installed end to end with an overlap to construct a continuous wall.
Soil mixed walls can offer a low-permeability value engineered method for the construction of cut-off and retaining walls that can be combined with internal bracing or post-tensioned anchors for deeper shoring applications.
For more information on CJA’s expertise, design/build options, and services for soil mixed walls please contact our nearest office location.