水利水电技术2018，Vol.49Issue(3)：164-169,6.DOI:10.13928/j.cnki.wrahe.2018.03.024
地基膨胀土浸水膨胀变形试验研究
Experimental study on inundation swelling deformation of expansive soil foundation
摘要
Abstract
By taking the undisturbed expansive soil at a location of the second double line of Lanzhou-Xinjiang Railways the object,the experiments on the graded inundation swelling deformations under the overlying loads of 0 kPa,10 kPa,20 kPa,30 kPa,40 kPa and 50 kPa are respectively made.The study result shows that along with the increase of the water absorption of soil mass,the swelling amount exhibits an "S" typed increasing trend of slow increase,accelerated increase and stable increase.The overlying load plays the restrictive role on the swelling amount,i.e.the larger the load is,the less the swelling amount is to be,thus the swelling deformation of the expansive soil foundation mainly occurs in shallow expansive soil,while the swelling limit water content is gradually decreased along with the increase of the overlying load with an exponential change law.Through the further analysis on the experimental data,the calculating mode of the swelling amount of the undisturbed expansive soil under the condition of the coupling of water absorption rate and the overlying load is established.The results obtained from the calculating mode are better coincided with the measured data,and then can provide a certain theoretical support for the construction of the project within the expansive soil region in the days to come.关键词
地基膨胀土/吸水率/上覆荷载/膨胀量/计算模式Key words
foundation expansive soil/water absorption rate/overlying load/swelling amount/calculating mode分类
土木建筑引用本文复制引用
王炳忠,王起才,张戎令,薛彦瑾..地基膨胀土浸水膨胀变形试验研究[J].水利水电技术,2018,49(3):164-169,6.基金项目
国家自然科学基金项目(51768033) （51768033）
长江学者和创新团队发展计划滚动支持(IRT_ 15R29) （IRT_ 15R29）
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(2015QNRC001) （2015QNRC001）
飞天学者特聘计划 （）
陇原青年创新人才扶持计划 （）
甘肃省基础研究创新群体(145RJIA332) （145RJIA332）
