โ Scribed by K. Takegawa; A. Nakazawa; K. Ryokai; S. Akagawa
No coin nor oath required. For personal study only.
Consideration of the creep characteristics of frozen soil is required when it is used for the construction of retaining walls. It is generally accepted that there are three kinds of frozen soils, i.e., frozen soil without ice lenses, frozen soil with layers of ice lenses and frozen soil with needle-like ice lenses, influenced by freezing conditions and physical properties of the soil itself.
This paper is a study of properties of deformation and rheological and strength characteristics of frozen soil, with an unconfined compression creep test and an unconfined compression test. The test results show that existence of alternate ice layers in the frozen soil affects properties of deformation rather t~han those of strength.
Generally, elastic strain appears instantaneously upon loading and deformation increases with the lapse of time, finally leveling off to a certain value as long as the load is below a limited value. Stress at the time of the greatest of the leveling-off strains is called an upper yield value o u.
It was found that, when a stress applied to frozen soil without ice lenses is below the upper yield value mentioned above:
(1) Strain is linear to time lapse expressed in logarithms.
(2) Strain is linear to the stress applied.
๐ SIMILAR VOLUMES
This paper gives a brief account of the results of a series of oedometer tests and triaxial creep tests on frozen soils. The oedometer tests are performed on artificially frozen sand, silt and clay. The tests also include ice as a reference material. The results are given by parameters describing t