Manufacture of Bored Piles using Pneumatic Pulse Technique

Abstract

Undesired lower soil-bearing capacity of a bored pile against a driven pile is widely known. The bearing capacity of the latter can be an order of magnitude higher than that of the bored pile. This difference is explained by the fact that during the immersion of the driven pile, a compacted zone is formed in the surrounding space, which leads to a conditional increase in the pile support area. Thus, the development of bored pile technologies with the formation of a compacted zone in the surrounding soil, is an urgent task.
Purpose: The purpose of this work is to describe a pneumatic pulse technique for constructing bored piles, which allows forming a blast-enlarged base in the pile and compacted soil zone in its surrounding space.
Research findings: Based on a comprehensive analysis of existing methods of constructing bored piles with blast-enlarged bases, a new highly efficient method is proposed for constructing bored piles in different soil conditions.