MATEC Web Conf.
Volume 216, 2018X International Scientific and Technical Conference “Polytransport Systems”
|Number of page(s)||8|
|Section||Construction and Transport Machinery, Non-Destructive Testing and Technical Diagnostics|
|Published online||17 October 2018|
Optimization of technical solutions for pilot hole drilling in soil
N.A. Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, 630060 Novosibirsk, Russia
2 Siberian Transport University, 630049 Novosibirsk, Russia
* Corresponding author: email@example.com
The paper discusses approaches to improvement of equipment for borehole drilling with a predetermined trajectory in construction of underground utility systems and facilities. Piercing method allows implementing dry drilling of boreholes with small diameter using simple technical equipment. The methods used when preparing the research are analysis, generalization, and experimental research methods. Outcomes of the research include evidence that increase in performance of vibro-impact piercing is possible not only due to higher impact energy, but also due to optimization of interaction between the operating tool and soil. Combination of dynamic action by impact pulses and static forces applied to the drilling equipment enables to enhance performance of impact pulse action and increase the drilling speed. Accuracy of the borehole trajectory can be provided by using dynamic stabilizers or correcting the drilling direction due to asymmetrical tool shape in combination with the torque moment of a drilling equipment. The study formulates requirements to design of a drilling unit for directed pilot hole drilling by dynamic piercing method. The design of an improved pneumatic tool installed in front of the drill string and equipped with asymmetrical front head is described. Experimental research results are given on the process of a borehole drilling using the described tool.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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