The monolithic raft footings used in building nuclear power plants largely use large bored piles up to 1.50 m or so in diameter, with piles approx. 4-6 m apart. One particular feature arises if bituminous sealing is used. In that case, the slab on ground is often divided into two separate slabs: the lower pile head slab and the upper building seal slab, between which the sealant is then applied.

Bored piles are often used in foundation work in existing structures, as they are largely vibration-free.

When performing foundation structures in existing buildings, work often has to be done close to, or even over, safety-related underfloor structures. There is usually not much space for large drilled piles in such areas, so that micro-piles or continuous flight auger piles are used, which can be used virtually vibration-free even in the vicinity of safety-related pipes.

Particularly in the vicinity of safety-related pipes in the subsoil, particular attention must be paid to the horizontal loads transmitted by wind, earthquake etc. to avoid putting any additional stresses on the pipes. This can be avoided, for example, by ‘insulating’ piles in the vicinity of pipes or using angled piles if there is enough space.