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目前,国内对于黄土抗剪强度指标与干密度的规律研究还不够深入,针对晋中黄土进行固结排水三轴剪切试验,主要研究干密度对抗剪强度指标的影响规律。试验结果表明:随干密度的增大,应力应变曲线由弱硬化型转化为强硬化型;随干密度的增大,抗剪强度指标c增大幅度逐渐变小;抗剪强度指标φ并不会随干密度的增大而无限增大,而是存在一个临界值31.35°,与实际情况相吻合。
At present, the research on the law of shear strength index and dry density of loess is still not deep enough in our country. According to the triaxial shear test of consolidation drainage of Jinzhong loess, the influence law of dry density on the shear strength index is mainly studied. The results show that with the increase of dry density, the stress-strain curve changes from weak-hardening to strong-hardening. With the increase of dry density, the increase of shear strength index c gradually decreases. The shear strength index φ does not But increases with the increase of dry density, but there is a critical value of 31.35 °, which is consistent with the actual situation.