铁道科学与工程学报2017，Vol.14Issue(4)：690-696,7.
高速铁路地基膨胀土膨胀变形试验研究
Experimental study on expansive deformation of expansive soil in high speed railway
摘要
Abstract
The effect of moisture content and thickness for the process expansion of undisturbed expansive soil was studied under the second line of Lanzhou to Xinjiang Railway. Through swelling quantity tests for thickness of 5, 10, 15 and 20 cm under different moisture content, the process expansion of undisturbed expansive soil with different thickness and different water content was concluded. Test results show that when the thickness is constant, the larger the water content is, the larger the expansion process of undisturbed expansive soil is, the smaller the water content is, the smaller the expansion process of undisturbed expansive soil is. When the moisture content is low, the thickness has a great influence on the expansion process of undisturbed expansive soil. When the water content is higher, the thickness of the expansive soil has little influence on the expansion process of undisturbed expansive soil. It is found that the expansion process of the undisturbed expansive soil has a good logarithmic relationship with moisture contentin the case of a certain thickness through further analysis of the test data. According to the parameters of the formula, the calculation model of expansive soil under the coupling action of water content and thickness is established. The calculated results agree well with the measured data, which provides some theoretical support for the project construction of the expansive soil area in the future.关键词
高速铁路/原状膨胀土/过程膨胀量/含水率/厚度/计算模型Key words
high-speed railway/undisturbed expansive soil/processexpansion/water content/thickness/calculation model分类
建筑与水利引用本文复制引用
薛彦瑾,王起才,张戎令,马丽娜,王冲,王炳忠..高速铁路地基膨胀土膨胀变形试验研究[J].铁道科学与工程学报,2017,14(4):690-696,7.基金项目
长江学者和创新团队发展计划滚动支持项目(IRT15R29) （IRT15R29）
中国铁路总公司科技研究开发计划课题(Z2015-G001) （Z2015-G001）
青年人才托举工程资助项目(2015QNRC001) （2015QNRC001）
陇原青年创新人才扶持计划资助项目 （）
兰州交通大学优秀平台资助项目(201606) （201606）
