Use of Innovative Shotcrete-Tube Technology in Excavation Mechanism Instead of Bentonite Clay Cycling

Abstract—Nowadays excavations are mostly performed with bentonite clay cycling which is so inappropriate in economical and timing issues of projects.In this method introduced, all unwanted machinery and constructions are limited and replaced by a simple tube and nozzle designed for shotcreting and restraining the drilled walls, which provides its stability against falling down and also waterproofing bore walls against water streaks, drilled through.In this experimental work, a new device is designed and some tests were accomplished in soils with different properties and all advantages and disadvantages of this brand new method are informed.