Blasting Damages onto Adjoining Structure and Precautions During Pile-Hole Sinking

摘要

An investigation is carried out on the blasting damages onto pile action layer, inter-pile rock pillar, lining, subway shield structure, pile core concrete, adjoining structure during pile-hole sinking in recent years. Also the instability and deformation of foundation pit slope caused by the same reason is investigated. Based on numerical analysis on adjoining structure damages, the failure criterion is derived and the corresponding precautions are presented in this paper.