关键词: 横观各向同性, 冻土, 弹性模量, 泊松比, 强度准则

Abstract: Under the analysis frozen earth forming process and the fabric premise, embarks from the frozen earth viewing carefully structural feature, regards as the transverse view isotropic solid dielectric which the frozen earth is composed of the ice layer and the dry and hard soil layer caking. According to the theory of composite materials mechanics, in outside the frozen earth isotropic surface and the surface elasticity coefficient and the Poisson’s ratio are obtained. Based on the Tsai-Wu criterion, the transverse isotropic frozen soil strength is perdicted. According to the empirical data, the influence of the different components on the frozen soil elastic constant and strength is analyzed. In the project application, according to the ambient temperature and the soil texture, whether there is the system moisture content supplies, the temperature drop speed and the freeze speed whether synchronization, the frozen soil stress direction and the freeze title page direction special details selects then, thus the indoor and outside test number is reduced largely. Has laid the foundation for the frozen soil project numerical calculation, to further understand that the frozen soil mechanics characteristic so as to provide the theoretical basis.

Key words: transverse isotropy, frozen soil, Young’s modulus, Possion’s ratio, strength criterion