Soil injection is used in many building projects to introduce an underground building layer. This horizontal soil seal is an alternative to underwater concrete or a combination of a sheet pile wall and drainage.
Soil injections are used to stave off the influx of groundwater from underneath. For this, a mix of water, water glass and a hardener is injected into the soil at a predetermined depth, lower than the excavation level, to prevent cracking of the construction pit soil.
After injection, this water glass mixture forms a ball that compresses itself between the grains of sand. Because the injected balls of liquid overlap each other, there is ultimately no room for groundwater. This is called permeation grouting. After about seven days, the water glass mix is hardened to such a degree that it forms a water-inhibiting gel layer. This layer blocks the groundwater, creating a water glass carpet. After this, the source drainage can be started.
Grondinjectie Nederland has an automatic pump system for carrying out soil injection that injects the liquid into the soil at the right place and in the right dosage. Our advanced water glass injection unit is equipped with the most modern technology. The injection process is therefore quick and efficient.
Some advantages of a horizontal under-barrier using soil injection are:
– Little or no groundwater extraction;
– Clean and dry construction pit;
– Construction pit can be excavated after seven days;
– Dry excavation can take place;
– During excavation, there is no horizontal pressure on the injection layer and there is therefore no chance of leakage of sheet piling;
– Tight anchors or posts are not required due to downward pressure from the ground.