For a moisture-free construction pit, soil retaining walls should also be provided, by means of a sheet pile wall, a Cutter Soil Mix (CSM) wall or a pile wall. After placement of the wall, injection hoses are placed perpendicular to the ground after calculation. These hoses are connected to pumps that pump the mixture into the ground under low pressure. The liquid becomes a sphere, which replaces the groundwater.
After about seven days, the spheres overlap and harden. This gel layer provides water retention, keeping the construction pit dry.
Vertical soil injection is also called constructive soil injection. This specific technique is used to improve the strength properties of soil and has the great advantage that it can be applied under a plot adjacent to a construction pit. Before injection is started, injection lances are inserted according to a predetermined pattern by injecting water, drilling or boring.
During injection of the sodium silicate and hardener mixture, pressure, flow rate and the total volume injected at each point are automatically controlled and recorded.
In addition to vertical soil injection, of course, we also provide horizontal soil injection.
To seal the excavation walls, injection tubes are placed vertically in the ground after a sheet pile, CSM or pile wall is installed. They pump the mixture into the soil at low pressure.
To keep an excavation dry, you need to seal the walls as well as the base.
After about seven days, the injected bulbs have hardened and overlap. This gel layer holds back groundwater, keeping the excavation dry.
