EVALUATION OF THE PILE BEARING CAPACITY IN ROCK INTERBEDDED BY COHESION SOILS UNDER VERTICAL LOADING

Introduction . The current regulatory calculation procedure for piles in rocks provides a means to determine the bearing capacity of pile embedded solid rock mass containing no weak interlayers. However, it is not uncommon actual design practice rocky soils be interbedded with softer and less stiff dispersive soils, whose presence affects performance. In this case, summation estimated resistances along length at its foot overestimates capacity, which does correspond work due different rates friction force generation varying formations. Aim To develop determining single bored cast place interacting cohision under vertical indentation loading. Materials Methods estimating skin resistance penetrating based on analysis static tests numerical simulation, taking into account tabulated analytical solutions given literature. Results A was developed using literature, empirical dependencies, simulation. As criterion ultimate shear soil, formula reference settlement S ref proposed, factors dimensions characteristics shaft material. extent sensitive parameters model computational assumptions modeling analyzed. presented examples via proposed show results similar experimental data obtained field tests. Conclusions method allows engineers factor soil interbedding increase capacity.