Improvement of Hole-Making in Soil by Puncturing
B. B. DANILOV, A. S. KONDRATENKO, B. N. SMOLYANITSKY, A. S. SMOLENTSEV
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: скважина, погружение, пневмомолот, труба, транспортирование, грунтовый керн, поршень, сжатый воздух, давление, hole, driving, air drill hammer, pipe, transport, soil core, piston, compressed air, pressure
Abstract
In focus is improvement of hole-making technology by puncturing with batch-wise removal of soil core while a pipe is driven in soil under impact loading. The important advantage of the technology is the concurrent pipe driving and soil core removal. The minimal air pressure required to separate a core and transport it along the pipe is determined. The frequency of soil core separation and transport during vibro-impact puncturing of pipes in soil has been tested in underground construction of utilities. The tests prove the possibility to cut-down time of trenchless construction of underground passages and to raise the level of mechanization of the operations.
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