中文摘要：

以隆林—百色高速公路膨胀土为研究对象,开展了石灰处治膨胀土填筑路基试验路段原位现场试验研究,以探究处治土土体内土压力、温度及含水率的变化规律,确定温度、湿度和荷载作用下大气的影响深度。通过实验研究得知,土体内竖向应力随填土高度的增加呈线性增长;温度的影响深度约为2 m,土体表面0.5 m深度范围内温度变化幅度较大,且土体内存在温度滞后效应,随着深度越大,滞后效应越明显;处治后土体内含水率变化较小,说明了石灰处治膨胀土路基试验路段具有良好的保水性。

英文摘要：

Taking the expansive soil of Longlin-Baise speedway improved with lime as an research object,the variation of soil pressure,temperature and moisture content was studied by means of field test,and the influence depth of atmosphere under different environment temperature,moisture and loading was determined.The results reveal that with the increase of embankment height,the vertical soil pressure increases linearly;the influence depth of temperature is about 2 m;temperature changes drastically in 0.5 m above and below the surface of the soil,and there is a temperature hysteretic effect in the soil,which becomes more obvious with the increase of depth;moisture content changes little in the expansive soil improved with lime,showing that the soil has good water holding capacity.