METHOD FOR PREVENTING FLOATING OF UNDERGROUND STRUCTURE

PURPOSE:To prevent floating of an underground structure and to reduce costs by placing upper soil on a widened bottom portion formed in the lower portion of the underground structure, the dead load of the upper soil being greater than the result of subtraction of the dead load of the underground str...

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Bibliographic Details
Main Authors NAKAMURA TAISUKE, ARIYAMA MOTOSHIGE, IKEUCHI YOSHIHIKO, ARAI MASAO, MITSUSAKA HIROAKI
Format Patent
LanguageEnglish
Published 07.06.1994
Edition5
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:PURPOSE:To prevent floating of an underground structure and to reduce costs by placing upper soil on a widened bottom portion formed in the lower portion of the underground structure, the dead load of the upper soil being greater than the result of subtraction of the dead load of the underground structure from pumping pressure acting on the underground structure CONSTITUTION:An underground wall 2 integrated to a container 1 or the like has its lowermost portion formed into a widened bottom portion 22 thicker than other wall portions 21. Next, granular upper soil 3 of specific gravity greater than that of water, such as earth and gravel, is packed above the widened bottom portion 22 to increase the dead load of the wall 2. In that case, the dead load of the upper soil 3 is greater than that obtained when the dead load of the container 1 including the wall 2 is subtracted from pumping pressure acting on the container 1 including the wall 2, so that the dead loads of the container 1, the wall 2 and the upper soil 3 resist a pumping force F. Therefore, costs can be reduced and the reliability of floating preventive effects can be enhanced.
Bibliography:Application Number: JP19920332192