摘要
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。
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 ①under the same compaction degree and water content, the matrix suction linearly decreases approximately with the increase of temperature; ② under the same compaction degree and temperature, the matrix suction decreases with the increase of water content; ③under 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; ④a 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.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2011年第3期368-372,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(50979080)
国家高技术研究发展计划(863)项目(2009AA11Z102)
交通部西部交通建设科技攻关重点项目(200531874010)
湖北省自然科学基金项目(2009CDB383)
关键词
温度
压实度
含水率
基质吸力
土水特征曲线
temperature
compaction degree
water content
matrix suction
SWCC
