Which type of pile relies on the bearing resistance of soil or rock for support?

End-bearing piles are designed to transfer the load of a structure directly to a strong layer of soil or rock beneath the pile's base. This type of pile rests on a stable foundation material, allowing it to support the weight of a structure efficiently. The bearing resistance from the underlying soil or rock is what provides the necessary support, effectively allowing the load to be distributed through the pile down to the more capable strata.

In contrast, friction piles rely on the friction between the sides of the pile and the surrounding soil to support the load, rather than transferring the load directly to a solid base. Dynamic piles and floating piles also follow different principles; dynamic piles often use impact techniques to achieve penetration into the ground, while floating piles are situated in soil with lower density and depend on buoyancy rather than on bearing resistance for support.

Therefore, end-bearing piles operate fundamentally on the principle of utilizing the load-bearing capabilities of the denser soil or rock directly underneath, making them suitable for situations where such strong substrates are accessible.