摘要
以南宁高速铁路弱膨胀土填筑路堤在干湿循环下,土体非饱和特性的变化规律为依托,采用压力板仪法和滤纸法测试,对南宁重塑非饱和弱膨胀土室内的土-水特性进行了研究,并与现场监测情况进行对比分析。研究结果表明:土体土-水特性在干湿循环下,存在明显滞回效应;滤纸法试验值与现场监测值更为接近,所得方程对路堤土-水特征稳定性预测效果更佳。
Replying on change regularity of characteristic of unsaturated expansive soil under dry-wet cycle of weak expansive soil filling embankment of Nanning High-speed Railway,pressure plate extractor method and testing by filter paper are adopted to study soil-water characteristics in remodeled unsaturated weak expansive soil chamber in Nanning, and conduct comparative analysis with in-situ monitoring conditions. Research results show that： there is obvious hysteresis effect in soil-water characteristics of soil mass under dry-wet cycle; test results from filter paper method are closed to the data of in-situ monitoring,so better prediction effect of soil-water stability of embankment can be achieved by the equation obtained by this method.
出处
《路基工程》
2016年第1期61-66,共6页
Subgrade Engineering
基金
国家自然科学基金资助项目(41502289
41530639
41172260
41372292)
