饱和原状黄土的液化及其影响因素的试验研究
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摘要
用固结不排水方式对饱和原状黄土进行动三轴试验,分析了不同的有效围压、循环应力比、加荷频率、饱和度及超固结比对饱和黄土液化的影响。文献[2]认为黄土孔压因受到制约达不到围压,因而也达不到初始液化,试验表明,黄土可以达到初始液化,所以初始液化还是可以作为液化判别标准,研究还表明随着饱和度的减小,频率、超固结比的增大,饱和黄土的动强度有所提高。
Saturated loess samples are experimented by dynamic triaxial apparatus with CU method.The effects of various effective confining pressures,cyclic strain ratio,loading frequency,degree of saturation and over consolidation ratio on saturated loess liquefaction are analyzed.It is considered that pore pressure of loess can't reach effective confining pressure due to restriction,thus can't be in state of initial liquefaction in document\.The results of the experiment show that pore pressure of loess can reach initial liquefaction,so initial liquefaction can be standard of liquefaction judgement.With decrease of degree of saturation and increase of loading frequency and over consolidation ratio,dynamic strength of saturated loess is increased.
引文
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