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Formation of Underground Cavities by the Use of Explosives (Sozdanie Podzemnykh Emkostei Kamufletnymi Vzryvami)
Researchers in the USSR used triple-stage conventional underground explosions in drill holes to construct underground storage cavities. Field observations of this method showed it to be quantitatively and qualitatively satisfactory for storage of fuels, but the method would be applicable to other types of storage and construction, such as tunnels, canals and trenches, and large-volume excavation work. Plastic clay soils can be compacted by explosions to prevent seepage of stored material, provided they contain no inclusions which might contaminate it. Maximum increase in soil density approaches 40% of initial density, while initial mechanical properties, such as unconfined compressive strength and cohesion, increase 4 times. The article discusses the technology and formulas for enlarging original drill holes by successive explosions after preliminary soil-cement grouting of the overlying area. The size of the resulting strong watertight cavities depends on size of explosive charges and soil compressibility. The cavities can be constructed singly or simutaneously in groups, using the information and formulas given. Field tests were conducted in Scythian and Cambrian clays and morainic clayey soils. Details of these successful tests are discussed.
Formation of Underground Cavities by the Use of Explosives (Sozdanie Podzemnykh Emkostei Kamufletnymi Vzryvami)
Researchers in the USSR used triple-stage conventional underground explosions in drill holes to construct underground storage cavities. Field observations of this method showed it to be quantitatively and qualitatively satisfactory for storage of fuels, but the method would be applicable to other types of storage and construction, such as tunnels, canals and trenches, and large-volume excavation work. Plastic clay soils can be compacted by explosions to prevent seepage of stored material, provided they contain no inclusions which might contaminate it. Maximum increase in soil density approaches 40% of initial density, while initial mechanical properties, such as unconfined compressive strength and cohesion, increase 4 times. The article discusses the technology and formulas for enlarging original drill holes by successive explosions after preliminary soil-cement grouting of the overlying area. The size of the resulting strong watertight cavities depends on size of explosive charges and soil compressibility. The cavities can be constructed singly or simutaneously in groups, using the information and formulas given. Field tests were conducted in Scythian and Cambrian clays and morainic clayey soils. Details of these successful tests are discussed.
Formation of Underground Cavities by the Use of Explosives (Sozdanie Podzemnykh Emkostei Kamufletnymi Vzryvami)
A. S. Dobina (author) / N. A. Evstropov (author)
1969
16 pages
Report
No indication
English
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