压实花岗土的Yasufuku模型研究

Study on Yasufuku model for compacted decomposed granite soil

利用花岗土实施多种应力路径试验,并用实测结果比较研究了Yasufuku本构模型的适用性。结果表明,用Yasufuku本构关系预测的应变与实测值较为一致,只是在提高围压的同时增大偏应力显现出较为明显的差异。

The stressstrain behavior of soil is in general dependent on the stresspath and largely irrecoverable,because the deformations depend on the confining pressure.Thus,the strains of soil due to a given increment of stress may vary considerably depending on the stress level,the confining pressure,and on whether the changes of stress involve primary loading,unloading, or reloading.It is shown that the predicted and measured strains agree with each other but it underestimates deviatoric stress and volumetric strain with a simple stresspath.Therefore,application of Yasufuku model is good for compacted decomposed granite soil.