Structural soil injectionStructural soil injection is used to improve the strength characteristics of the soil.Because there is more construction underground in busy, often inner-city areas, there is an increase in the demand for structural soil injection. Structural soil injection has the great advantage that it can be appleid below a site adjacent to a construction pit. This means there is no loss of space. The injection body can also serve as permanent formwork for concrete.
Structural soil injection is also used for deepening or making cellar constructions underneath existing houses, connections in construction pits, reinforcement of strip foundations and piled foundations, etc…. Before starting the injection, the lances are inserted following a pattern determined in advance. Placing the injection lances is done with the assistance of water injection, by drilling or by sonic drilling. Then the injecting can start. During the injection, pressure, flow rate and the total quantity injected per injection point are controlled and registered automatically. Structural soil injection is carried out using a water glass-hardener mixture. The ratio of the water glass and hardener is determined in advance depending on the strength required. Before structural soil injection is carried out, a geotechnical calculation is made to define the dimensions of the injection body. B&W Grondinjectie can assist you to make such a calculation. Structural soil injection is only possible if the soil involved mainly consists of sand and/or fine grained gravel. Soil examination must show whether the soil at a construction site is suitable for the described technique. To this end a number of soil samples are taken that can also be used in the laboratory to make a grading curve. On the basis of this examination, specialists carry out a geotechnical calculation to determine the dimensions of the injection body. Using all measurements and calculations, our experts draw up an injection plan. From that moment almost all procedures, such as the placing of the injection lances and also the injection itself, are mechanised and automated. |
