EXPERIMENTAL STUDY OF PIPES INDENTION IN SOIL UNDER THE ACTION OF AIR-DRIVEN HAMMER WITH TWO-MASS PISTON
V. V. Chervov, I. V. Tishchenko
Chinakal Institute of Mining, Siberian Branch Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Пневматический молот, расход воздуха, удар, частота, масса, энергия удара, труба, Pneumatic hammer, air consumption, impact, frequency, mass, impact energy, pipe
Abstract
The experiments were carried out to study a system with two mobile percussion masses incorporated in a common housing for steel pipes penetration into elastic-plastic environment under the action of vibro-pecrcussion. A laboratory sample of a pneumatic hammer with the pipe driving unit based on the air distribution scheme with an elastic valve in the pressurized chamber for return-stroke of the piston was fabricated and tested. The results of the study of the working cycle for different types of settings are given. Preliminary data on the possible effects of percussion actions on the duration and frequency of impact impulses are obtained.
|
