Theoretical and experimental study of deep soil compaction with a cone reamer

Abstract

Introduction. The road-building machines and mechanisms are always improved depending on the tasks formed in the specific operating conditions of these machines. One of the problems of road construction in difficult climatic conditions is the lack of ground base strength, which results in road surface deformation during operation and periodic traffic restrictions, increasing the cost of maintenance. The road surface annual repair does not fundamentally solve the problem of the roads’ long-term and reliable performance. This problem can be solved by modernizing, for example, a working body for soil compaction based on a crawler excavator. Research aim is to develop a mathematical model for determining the dynamic characteristics of a cone reamer’s effective design to ensure deep compaction of soil foundations for highways and industrial and civil facilities. Research methodology is based on a system analysis of the basic tracked vehicle, the working body, and the compacted soil. The research methods also include mathematical modeling of the cone working body interaction with the soil. Results reliability is confirmed by comparing the results of numerical modeling and experimental studies. The discrepancy between the obtained results of mathematical modeling and laboratory tests in terms of torque and power does not exceed 7–10%. Conclusions. A method for determining the dynamic characteristics of cone devices is developed, and calculation formulas are derived for determining the tilting moment and torque that are applied to the shaft when compacting soils with different characteristics. Experimental studies have been conducted 70 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 3. 2021 ISSN 0536-1028 that have shown the efficiency of this working body. The developed method for determining the dynamic characteristics of cone devices is experimentally confirmed.