Experimental investigations of bearing capacity of bored-cast-in-place tapered piles

Conclusions1. The investigated types of bored-cast-in-place tapered piles with a taper angle of 1°20′, 2°, and 2°40′ have a specific bearing capacity which exceeds by 20–30% the specific bearing capacity of cylindrical piles having the same length.2. The bearing capacity of tapered piles and the consumption of materials in them increase in direct proportion to the increase in the taper angle. The most rational type within the investigated limits is a bored-cast-in-place pile with a taper angle of 2.5°.3. Introduction of tapered piles based on the above investigations has made it possible to obtain a significant economic effect.