Small-diameter columns to improve the soil in-situ
Springsol® process can be applied in confined or limited headroom spaces to build soil-cement columns. This technique can be used for underpinning works as well.
Springsol® process is one of a wide range of solutions within the Deep Soil Mixing family. It uses a fixed or opening tool to construct columns using a small diameter drilling rig.
The process was initially developed in order to reinforce railway platforms without removing the tracks, while respecting certain requirements:
- Work with low clearance (beneath overhead lines),
- Drilling between railway sleepers,
- Protection of ballast, particularly with regard to cementing,
- Need for minimal traffic disruption.
Since then, the process has been applied to a wide variety of soil improvement works. As well as the reinforcement of railway platforms, the process was used for ground improvement works under paving, concrete slabs and footings, embankment stabilisation and in-situ soil remediation.
Like other soil-mixing elements, Springsol® columns behave as semi-rigid inclusions, stiffer than the non-treated soil, but softer and less rigid than concrete.