Effective method of drilling soil exploration boreholes in frozen ground
Construction Under Special Soil Conditions
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Conclusions
- 1.
Cooling of compressed air in a heat exchanger by means of atmospheric air is sufficiently effective for drilling holes in frozen rocks with blowing.
- 2.
The proposed method of cooling compressed air does not require considerable material expenditures and permits obtaining high-grade samples.
- 3.
When drilling frozen soils having a moisture content greater than 10% a high-grade core can be obtained by means of a single-tube core barrel. In soils with a moisture content less than 10% a double-tube core barrel must be used.
Keywords
Drilling Civil Engineer Heat Exchanger Structural Foundation Hydraulic Engineer
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Literature cited
- 1.B. B. Kudryashov, “Normalization of the temperature regime of boreholes when drilling frozen ground with air cleaning of the bottom,” Zap. Leningr. Gos. Inst.,57, No. 2, Leningrad (1969).Google Scholar
- 2.V. I. Kovalenko, “Investigation of the temperature regime of a core of frozen ground,” Zap. Leningr. Gos. Inst.,66, No. 1, Leningrad (1973).Google Scholar
- 3.B. B. Kudryashov, V. I. Kovalenko, V. K. Chistyakov, et al., “Effective method of increasing the recovery and quality of a core in frozen ground,” Zap. Leningr. Gos. Inst.,57, No. 2, Leningrad (1969).Google Scholar
- 4.M. A. Gus'kov, “Boring core holes with compressed-air cleaning of the bottom under permafrost conditions,” Kolyma, No. 1 (1960).Google Scholar
Copyright information
© Plenum Publishing Corporation 1978