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采用新疆荒漠区风积沙,进行90组试样的动三轴试验,研究其动应力-动应变关系,基于试验结果分析含水率、围压、压实度、荷载作用频率和初始静偏应力对动应力-动应变关系的影响规律,应用Kondner R L双曲线模型对动应力-动应变关系进行拟合,得出不同工况时的模型参数。研究成果可为新疆荒漠区风积沙路基的设计和施工提供一定的参考。
The dynamic triaxial tests of 90 samples were carried out using aeolian sand in the desert area of Xinjiang. The dynamic stress-strain relationship was studied. The moisture content, confining pressure, compaction, load frequency and initial static deviatoric stress were analyzed based on the test results On the relationship between dynamic stress and dynamic strain, Kondner RL hyperbolic model was used to fit the dynamic stress-strain relationship, and the model parameters under different working conditions were obtained. The research results can provide certain reference for the design and construction of aeolian sand subgrade in the desert area of Xinjiang.