Jet grouting (for ground improvement)
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Jet Grouting is a technique where grout, usually cement based, is delivered under very high pressure through a small aperture nozzle that converts the energy to a high velocity jet of grout. This simultaneously disintegrates the existing soil structure and mixes the in-situ soil with the grout.
Jet-Grouting involves a combination of the following three phenomena:
* Break-up of the soil structure by a fluid injected into the soil at high velocities;
* During treatment, extraction of excess part of the spoils to the surface;
* In-situ mixing of the soil particles with an hydraulic binder (slurry).
The distinct advantage of jet grouting is that it can be effective in all categories of soil, unlike classical grouting techniques which rely on penetration via voids in the soil mass.
There are multiple applications for Jet Grouting, such as retaining systems, cut-off barriers, plugs for the bases of shaft excavations, in transition zones in tunneling, in underpinning and to create rigid soil inclusions. The essential merits of Jet Grouting are to increase strength and/or impermeability in soils.
Advantages of Jet Grouting:
* Increases bearing capacity of deep seated layers
* Reduces post-construction settlement
* Reduces permeability of soils
* Creates plug for deep shaft excavation
Jet-Grouting involves a combination of the following three phenomena:
* Break-up of the soil structure by a fluid injected into the soil at high velocities;
* During treatment, extraction of excess part of the spoils to the surface;
* In-situ mixing of the soil particles with an hydraulic binder (slurry).
The distinct advantage of jet grouting is that it can be effective in all categories of soil, unlike classical grouting techniques which rely on penetration via voids in the soil mass.
There are multiple applications for Jet Grouting, such as retaining systems, cut-off barriers, plugs for the bases of shaft excavations, in transition zones in tunneling, in underpinning and to create rigid soil inclusions. The essential merits of Jet Grouting are to increase strength and/or impermeability in soils.
Advantages of Jet Grouting:
* Increases bearing capacity of deep seated layers
* Reduces post-construction settlement
* Reduces permeability of soils
* Creates plug for deep shaft excavation
