公路路基高液限粉土的利用原则与处治方法

以湖南某高速公路沿线的粉土为研究对象,收集了沿线粉土的试验数据等资料,总结了其特殊的物理力学特性.该区域的粉土具有天然含水量高、强度低等不良特征,属于典型的不良路基填料;然后,以天然含水量与最优含水量的差值范围及其承载比（CBR）值为评价指标,提出了高液限粉土的利用原则与压实度控制的建议值;最后,针对高液限粉土存在的问题提出了具体的工程处治方法,为高液限粉土路基修筑提供了技术参考.

Utilization Principle and Treatment Method of High Liquid Limit Silt Subgrade

The silt distributes widely along an expressway in Hunan Province.Based on collecting test data about silt,the special physico-mechanical properties of silt are summarized.The results show that the soil is high liquid limit silt,which has bad property with high natural water content and low strength.So it belongs to a typical inferior material for subgrade construction.The difference value between natural water content and optimum water content(△w) is one index,which was used to determine the utilization principle of the high liquid limit silt.California bearing ratio(CBR) is another index,which also could control the quality of construction materials.Finally,Specific utilization principles and engineering treatment methods are put forward according to the problems as above-mentioned.The results provide some technical references for subgrade constructions in high liquid limit silt distribution areas.