Discussion on Improvement of Rock Embedding Efficiency of Grab for Diaphragm Wall Engineering

Abstract:

Rock-embedding is more and more required in diaphragm wall engineering. According to the low rock embedding efficiency of the grab widely used at this stage, take the characteristics of grabbed formation as the starting point, the analysis was made on the reasons of low rock embedding efficiency; with rock fragmentation theory as theoretical basis, some improvement suggestions were put forward in the grab weight, cylinder closing force, bucket teeth arrangement and grabbing mode.

Key words:underground diaphragm wall; grab; rock embedding; bucket teeth arrangement