Applications and Techniques

The main feature of the DCIS pile is the enlarged base formed at the toe of the pile increasing the end-bearing of the pile considerably. The displacement caused when expelling the plug and forming the enlarged base compacts and pre-loads the surrounding soil resulting in a much lower base deflections than that of a bored pile. The driven cast-in-situ technique has been used extensively since many decades and is still one of the most popular piling technologies. Offering a wide range of pile sizes and the advantages of an enlarged base, DCIS piles are suited to structures that vary from single-storey residential buildings to multi-storey office blocks. Throughout the years a number of variations of the standard DCIS installation technique have been developed, which can be used for special applications.

 

IMPLEMENTATION

Different to bored piles Driven Cast-In-Situ Piles use a pile driving machine to produce the piles by driving a casing with a detachable base plate into the soil. Where required, a rebar cage is suspended inside the tube after the casing has been driven to the desired depth. Next concrete is pumped into the casing, here after the casing is withdrawn usually by means of vibrating. Alternatively a shorter rebar cage may be pressed into the concrete afterwards.

BENEFITS

• Driven Cast-In-Situ Piles are usually very economical.

• They offer an extensive range of pile sizes.

• DCIS piles have an excellent load / deflection performance and offer excellent tension load capacity.

• Noise levels are relatively low.