Injection grouting is one of the major techniques that Bachy Soletanche is able to offer in the complex field of ground improvement.
The main categories of injection grouting available are:
Grout filling of accessible pores between the solid particles in a permeable soil. This technique is generally used to reduce permeability and/or to strengthen and stiffen the ground.
Involves the deliberate fracturing of the soil or rock by grout under pressure. The resulting compaction and stiffening of the rock or soil mass can, in appropriate conditions, provide ground improvement where permeation grouting is not practicable.
Is an active technique to mitigate settlement arising from other engineering works (such as tunnel excavation) in order to provide protection to existing structures. Compensation grouting can take the form of permeation, compaction, or hydro fracture grouting depending on the local conditions of the given project.
Grout infilling of discontinuities, fissures, fractures or joints in mass rock with the intention of reducing permeability and increasing the competence of the mass rock. This technique is particularly employed for dam construction and tunnel construction.
GIN Grouting is a method of rock grouting that has been developed relatively recently and which is designed to limit the energy imparted to the rock to appropriate levels based on comprehensive trials ahead of the main works.
The injection methods that can be employed for the above techniques range from packer injection via a Tube a Manchette (TaM), packer injection direct into rock, descending / ascending, stage grouting or grout injection direct via drilling tools (end of casing grouting) or lancing.
