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contributor authorQiang Feng
contributor authorZedong Yang
contributor authorWeiwei Liu
contributor authorWeisheng Zhao
date accessioned2022-02-01T21:48:08Z
date available2022-02-01T21:48:08Z
date issued12/1/2021
identifier other%28ASCE%29CR.1943-5495.0000261.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4272056
description abstractConsidering the characteristics of the surrounding rock temperature and water replenishing direction of tunnels in cold areas, to study the frost heave deformation law of surrounding rock under a certain stress environment, a nonuniform frost heave test device using a flexible air bag to apply a stable confining pressure was developed. The device includes a loading system, a boundary temperature control system, a water replenishing system, and a testing system. Frost heave tests under both load and no-load conditions were carried out. The results show that: (1) the temperature in the specimens was distributed linearly along the specimen height; (2) the deformation of the specimens along the two directions of the temperature gradient and vertical temperature gradient was divided into three stages, namely, initial deformation, frost heave growth, and deformation stability, but the deformation values differ greatly, showing obvious nonuniform frost heave characteristics; and (3) the stress boundary condition had a significant effect on the frost heaving deformation. With increasing deviatoric stress, the frost heaving in the direction of the vertical temperature gradient increases until it exceeds the frost heaving in the direction of the temperature gradient. Finally, according to the superposition of the load strain and frost heave strain, an equation of the nonuniform frost heave coefficient considering temperature and deviant stress was established, which can provide an experimental basis for accurately establishing the constitutive relations of surrounding rocks and determining the frost heave forces of tunnels in cold regions.
publisherASCE
titleExperimental Study of the Anisotropic Frost Heave Characteristics of Rock Surrounding Tunnels in Cold Regions
typeJournal Paper
journal volume35
journal issue4
journal titleJournal of Cold Regions Engineering
identifier doi10.1061/(ASCE)CR.1943-5495.0000261
journal fristpage04021014-1
journal lastpage04021014-9
page9
treeJournal of Cold Regions Engineering:;2021:;Volume ( 035 ):;issue: 004
contenttypeFulltext


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