高速公路建设中中膨胀土特性的试验研究

随着高速公路建设的迅速发展,遇到的与膨胀土相关的工程问题也日益增多,以实际高速公路工程为依托,通过室内和现场试验,对中膨胀土的物理力学特性以及中膨胀土经过石灰改性处理后的的效果进行了研究。结果发现:未经石灰改性的中膨胀土在最佳含水量条件下有较高的强度,浸水饱和后膨胀量大,强度衰减很多,水稳定性很差;经石灰改性后的中膨胀土强度有很大提高,水稳定性也较好。这说明在工程建设中只要采取有效的处置措施和合理的施工方法,中膨胀土可以作为高速公路路堤的填筑材料。

Testing study on properties of mid-expansive soil for expressway construction

With the rapid development of expressway construction, more and more engineering problems related to expansive soil occur. Based on a real expressway project, the physico-mechanical properties of mid-expansive soil and its lime-treatment effect were studied by laboratory and field tests. It is discovered that mid-expansive soil without lime treatment has high strength at the optimum water content and in the immersion test it behaves as large swelling, decreasing strength and very bad water stability. While the strength of mid-expansive soil after lime treatment is largely increased and it has good water stability. All of those show the fact that with effective treatment and rational construction, mid-expansive soil can be used in the embankment fill of expressway.