| 摘要 |
FIELD: construction.SUBSTANCE: ice-resistant platform 1 comprises a lower 4 and an upper 2 truncated conical parts with tops directed accordingly up and down, and a cylindrical part 3 arranged between them. The platform is made in the form of a gravity platform, in which the total height of the upper truncated conical part and the cylindrical part makes not more thanwhereis average depth of ice keel in the place of platform location. The lower truncated cone with the top has height equal to the water reservoir depth in the place of platform installation and the average depth of the ice keel. The angle ? between the generatrix of the lower cone of the platform to the vertical line makes at least the angle defined from the ratiobut not less than 45°, where n - margin, F- limit load shifting the platform, g - free fall acceleration; M - platform mass, containing useful mass and mass of accepted ballast.EFFECT: stability of platform position on soil under action of a global ice load due to its minimisation and increased force that presses a platform when affected by large ice hummocks.3 dwg |
