Compaction grouting is a quasi-static process with controlled pressure and injection rates. There is therefore no risk of increasing pore water pressure nor generating post-construction settlement.
Depending on the equipment used, the energy applied and the type of ground, columns can be implemented with diameters between 0.5 and 3.0 meters. The largest diameters are obtained by simultaneously or sequentially injecting several types of fluid (double jet = slurry + air, triple jet = slurry + air + water). [...]
Jet grouting is poorly suited, as a rule, to soils with blocks and rough gravel, to organic materials and to soils through which large volumes of water flow.
Our company systematically controls cut-off to ensure the quality of the works. There is no risk of damage if earthworks are carried out according to best practices.
Groundwater is no obstacle. Care should be taken and the design should be adapted accordingly in cases where the water flow through the soil is high.
During the entire pumping operation, the water table is maintained at the level of the horizontal drain network. The process does not lower the water table within or around the worksite. The system pumps only the volume of water expelled by the soil during consolidation settlement and the residual flow necessary to maintain the [...]
The technique is rarely used on surface areas of less than 10,000 m².
This technique can substantially reduce consolidation time thanks to early pre-loading as soon as the system is in place and without risk of ground failure. The isotropic nature of the Menard Vacuum™ load and the “artificial beam” generated by the vacuum between the horizontal drains and the membrane have a strong stabilizing effect on the [...]
The main purpose of drains is to provide pore water with an escape path when the soil is subject to stressing due to preloading fill. Consolidation settlement takes place when pore water is removed from saturated soils. It is thus, as a rule, not necessary to install vertical drains if there is no water [...]
The answer is clearly YES, but the real question is whether it is useful to drain soils that already has good drainage characteristics.