Injection piles are a type of piling used in construction that involves the injection of a fluid into the ground in order to create and stabilize a pile to support the foundation of a structure. Injection piles are typically used for ground improvement and for the prevention of settlement or subsidence. The injection pressure of the fluid is typically between 0.2 and 220 bar and can vary depending on the application. Injecting fluid into the soil creates a soil-cement column which is a much more stable foundation than traditional pile foundations.
Injection piles can be used for a variety of applications such as soil stabilization and ground improvement, to prevent settlement and subsidence, and to increase the bearing capacity of soils. They are also used to reduce differential settlement, which is a problem that can occur when buildings, roads, or other structures are built on soils with different properties. Differential settlement can be a source of structural damage so it is important to ensure that the soil is properly stabilized before construction begins.
Injection piles can be installed either in dry or wet conditions. In dry conditions, a hole is drilled into the ground and a fluid is injected into the soil. In wet conditions, the same procedure is followed but with the addition of soil stabilization material such as bentonite or cement grout. The injected material may be polymer or lime-based, or may be a combination of these materials.
Injection piles are generally cheaper and easier to install than traditional concrete or steel foundations. They are also less labor intensive and require less materials. Additionally, due to the fact that injection piles can be installed in dry or wet conditions, they are an ideal choice for areas where groundwater levels are too high for traditional foundations.
Injection piles can also be used to increase the load-bearing capacity of existing soil and foundations, to reduce vibration and noise from nearby construction, and to improve soil structure. This is especially important for applications such as retaining walls and the building of embankments in areas susceptible to landslides.
In conclusion, injection piles are an efficient, cost-effective, and reliable alternative to traditional foundations. They can be installed in dry or wet conditions, and can be used to prevent settlement and subsidence, increase the bearing capacity of the soil, and improve soil structure. Injection piles are an ideal choice for a variety of construction applications, and can provide a much more stable foundation than other alternatives.
