INTERACTION OF A HELICAL BLADE OF A DRILLING TOOL WITH FROZEN GROUND

• Main Authors: I. G. Martiuchenko, M. I. Zenin
• Format: Article
• Language: Russian
• Published: Siberian State Automobile and Highway University 2020-05-01
• Series: Вестник СибАДИ
• Subjects: helical working element; frozen ground; frozen ground drilling; helical blade; soil spalling; blade punching; destroying section; drilling tool
• Online Access: https://vestnik.sibadi.org/jour/article/view/1061

Introduction. Drilling of frozen and permafrost soils is one of the most complicated and energy-intensive processes of earthworks. The current drilling tools are not efficient enough to use since they implement energy-intensive drilling processes and are not always suitable for various types of soil. The use of helical working elements that implement the process of soil destruction with less energy-intensive types of deformations is advanced. The purpose of the research is to study the interaction of a helical blade of a drilling tool with frozen soil.Materials and methods. The article covers a method for conducting experimental studies of the interaction of a helical blade of a drilling tool with frozen ground and the tested models of the drilling tool. The influence of geometric parameters of a helical drill on a borehole formation process is studied.Results. The experimental research proved the hypothesis about the possibility of implementing a drilling process with tearing strain and obtaining a borehole diameter larger than a diameter of a destructive section of a helical blade. The dependence of the destroyed soil volume and the relation of an obtained borehole diameter to a diameter of a destroying section of a helical blade according to the angle of bend of a helical blade radius at which its increment occurs is determined.Discussions and conclusion. It is established that a helical drilling tool performs a borehole drilling due to the tearing strain implementation, which makes it possible to achieve more efficient drilling and obtain a borehole diameter larger than a diameter of the destroying section of a helical blade.Financial transparency: the authors have no financial interest in the presented materials or methods. There is no conflict of interest.