Optimum Bored Pile Type Selection for Collapsible Soils

The operational reliability of the constructed buildings and structures depends on the rationally accepted type of foundation. In cases of presence of structurally unstable engineering-geological elements (EGE) in foundation, the increased requirements are imposed on design and construction of foundations. For foundation beds composed of collapsible soils of natural occurrence, the main deteriorating indicators are the relative collapsibility coefficient ɛse and the initial collapsible pressure Pse. The neglect of the influence of these indicators in most cases leads to deterioration in the reliable operation of the erected structures. The article presented here gives a case from geotechnical practice, when, a timely discovered error of not taking collapsible characteristics into account, made it possible to avoid an emergency situation at a structure under construction.

Keywords: Relative collapsibility coefficient; Initial collapsible pressure; Electric-discharge technology; Bored electric discharge (EDT) piles

Abbreviations: ɛse: Relative collapsibility coefficient; Pse: Initial collapsible pressure; EDT: Electric-discharge technology