Accession Number : AD0701176

Title :   PRESENT METHODS OF PREPARING FROZEN GROUND FOR EXCAVATION (Sovremennye Sposoby Podgotovki Merzlykh Gruntov k Ekskavatsii),

Corporate Author : SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL

Personal Author(s) : Chelnokov ,S. S.

Report Date : MAY 1960

Pagination or Media Count : 9

Abstract : The 10-year plan for the reconstruction of Moscow calls for extensive ground work such as the excavation of foundation pits, trenches for the construction of buildings, and underground installations. Various mechanical methods for working frozen ground are used in Moscow, the most noteworthy being blasting, mechanical crushing by means of wedge-shaped strikers, and soil thawing with warm water (water needles) and tubular electric heaters (electric needles). Despite the simplicity and low cost of this method, its application in cities is limited because of the safety hazard to the inhabitants and structures in the vicinity of the blasting site. However, present techniques of blasting have been perfected to such an extent that the danger to population and buildings is reduced to the minimum. Nevertheless, it would be desirable to simplify procedures still more and to further extend the limits imposed on blasting. (Author)

Descriptors :   (*UNDERGROUND STRUCTURES, CONSTRUCTION), (*SOILS, MASS TRANSFER), FREEZING, MELTING, HEATERS, ELECTRICAL EQUIPMENT, BLAST, EXPLOSIVE CHARGES, HAZARDS, SAFETY, DRILLING, USSR

Subject Categories : Soil Mechanics
      Civil Engineering
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE