Trench cutting and remixing deep (TRD) soil mix walls are mixed-in-place using a specialised vertical cutter post mounted on a base crawler machine.
The vertical cutter post, resembling a large chain saw, is inserted vertically in sections by the crawler machine until the design depth of the wall is reached. The crawler machine then advances along the wall alignment while the cutter post cuts and mixes the in situ soil with cement-based binder slurry injected from ports on the post. The vertical mixing action blends the entire soil profile, eliminating any stratification and creating a soil mix wall.
We can ensure quality through:
- Continuously checking binder at the plant and TRD (Specific gravity, temperature, flow rate)
- Data acquisition to show exact quantity of product installed for each metre of wall
- Constantly monitoring verticality
- Checking the workability of the mix with a flow table twice per shift
- Taking wet samples at any depth and checking for strength permeability or other requirements
- Coring the wall to check wall consistency
- Upfront Bench Scale testing of mix and soils