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针对初始含水率不同的膨胀土,开展了侧限膨胀试验和直剪试验,分别测定有、无香根草根系的试样在不同初始含水率时的膨胀力和抗剪强度指标。分析表明香根草根系能够减小膨胀力和增加抗剪强度。试验结果可以启发我们:对于具有一定饱和度的膨胀土边坡,在有降雨的情况下香根草根系可以作为一种柔性加固方法帮助边坡控制膨胀变形和释放膨胀力。
According to the expansive soil with different initial water content, the expansion test and the direct shear test were carried out. The expansive force and shear strength index of the sample with and without root vetch at different initial moisture content were measured. Analysis shows that vetiver roots reduce swelling force and increase shear strength. The test results can inspire us: For some expansive soil slopes, the vetiver root system can be used as a flexible reinforcement method to help the slope to control the expansion deformation and release the expansion force under the condition of rainfall.