考虑压实度时的土水特征曲线和温度对吸力的影响

取甘肃平定高速路堤黄土，采用张力计量测不同压实度、不同含水率下土样基质吸力随温度的变化；取重庆绕城高速路堤黏土，采用压力板仪量测不同压实度下，土样的土水特征曲线（SWCCs）。试验结果表明：①相同压实度和含水率条件下，基质吸力随温度的升高，近似线性降低；②相同压实度和温度下，随着含水率升高，基质吸力降低；③相同温度和含水率条件下，压实度对SWCCs的影响主要体现在曲线的中段，且压实度越高，影响越大，而在吸力较高段和含水率较高段，压实度对基质吸力的影响很小；④根据不同压实度下重庆黏土的SWCCs，提出了包含压实度的SWCCs直线段的线性表达式，与陈正汉等采用甘肃压实黄土得到表达式相似。

SWCCs and influence of temperature on matrix suction under different compaction degrees

The variation of matrix suction of Gansu loess with temperature is obtained under different compaction degrees and water contents by means of tensiometer, and the soil-water characteristics curves (SWCCs) of Chongqing clay under different compaction degrees are obtained by means of pressure plate apparatus. The test results show that ① under the same compaction degree and water content, the matrix suction linearly decreases approximately with the increase of temperature; ②under the same compaction degree and temperature, the matrix suction decreases with the increase of water content; ③ under the same temperature and water content, the compaction degree primarily affects the middle section of SWCCs , and the influence is greater while the compaction degree is higher, but the influence of the compaction degree on the matrix suction is low at the sections of SWCCs with high matrix suction and water content; ④ a linear formula fitting the linear section of SWCCs of Chongqing clay is provided, which includes compaction degree of soil, and it is similar to that for Gansu loess obtained by Professor Chen.