Connected techniques

Published on 12 February 2008

Often earthworks engineering requires special supplementary techniques which are carried out in parallel with the main works.

Improvement work on a slope (photo Razel)

Often earthworks engineering requires special supplementary techniques which are carried out in parallel. These are:
Stabilisation of compressible soils (particularly in embankment and infill foundations) by:

- Accelerated consolidation of the soil using pre-loading and/or l arge drainage structures
- Vertical piling to support the infill embankment: ballasted or piled columns; rigid inserts

- Embankment and infill retainment using geotextiles

- Embankments from “light” materials

Stiffening (inadequate access) or improvement (instability) of the slope by:

- Tie-rods or spaced liners

- A concrete wall or wall with self-retaining characteristics (reinforced earth...)

- Geotextiles

- Soil treatment of the slopes with lime and/or hydraulic binder

•Cavity surveys using geophysical methods

•Cavity infill

•Lowering of water tables

•Sealing operations on pits, voids and landfill sites by:

geomembranes; soil treatment using kaolinite or bentonite

•Soil depollution.