VDW Piles (Cased Bored Piles)
VDW piles are cased bored piles installed as tight pile walls using a casing tube.
Cased VDW piles enable the construction of durable underground structures even in challenging soil conditions. The casing ensures proper concrete formation in all soil types, making VDW piles an economical alternative to diaphragm walls.
VDW technology description
- The formation of bored piles in a casing pipe is carried out using a machine equipped with a double rotary head. During drilling with an auger, the excavated soil is brought to the surface.
- The applied casing pipe ensures stable operation of the auger and prevents excessive soil removal, providing borehole stability during drilling.
- After reaching the required depth, the concrete pile is formed in a manner analogous to the construction of CFA piles.
Advantages of VDW Piles
Technologia VDW is characterized by a number of advantages that make it widely used in the construction of excavation support systems. Above all, it enables the creation of a watertight retaining structure by forming secant pile walls, which effectively limits water ingress and soil movement.
Another important benefit of this technology is the possibility of using it in complex ground conditions, where other methods may be difficult or impossible to apply. In addition, VDW technology allows for the construction of deep excavation support systems, which is particularly significant for projects requiring large foundation depths.
A key advantage is also the absence of vibrations during the drilling process, which reduces the negative impact of the works on the surrounding environment, including nearby buildings and infrastructure.
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Applications of VDW Piles
• Residential, industrial, and infrastructure foundations (e.g., bridges and viaducts).
• Tight-sequence pile walls for excavation support.
• Pile walls adjacent to existing structures.
• Pile walls in high groundwater conditions.
• Strengthening of existing foundations.
