Study on the influence of creep on frozen soil plastic yield stress
QIAO Xiangping
YAO Xiaoliang
QI Jilin
ZHANG Ze
MU Qingsong
Abstract：Plastic yield stress is an important mechanic parameters of frozen soil.It is affected by a number of factors,such as frozen soil temperature,moisture content and stress.In order to quantitative the effect of creep on plastic yield stress of frozen soil,a one-dimensional creep model is proposed.A typical clay obtained along the Qinghai-Tibet highway is taken as an example.For each specimen,creep experiment for different durations was conducted at first,and then step loadings under K0 condition were applied.The results show that the applicability of the model directed at thawed soil was verified feasibility during the process of creep-unloading-loading.The comparison between test and calculation result reveals that plastic yield stress is a function of initial plastic yield stress,compression and unloading index.The logarithm of plastic yield stress is linearly related with creep strain (time).This quantitative relations describe well in relations between frozen soil plastic yield stress and creep strain (time).
Keywords：frozen soilcreepcreep model of frozen soilplastic yield stress
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 121-126 )