摘要
收缩性是膨胀土的一个很重要特性,对路基灾害防治及边坡治理工程都有很重要的影响,目前已有不少学者对此进行研究并得到了许多有意义的成果。以现有的VSC模型为基础,提出了一个用于描述在不同初始状态下膨胀土体收缩变形拟合的模型,用该模型对3个工程的相关收缩试验数据进行了拟合验证,所得到的拟合结果与实测较为一致,验证了新模型的适用性。模型共有a、b、m、n四个参数,并且将参数b的值固定为0.02后仍可以得到较好的拟合结果;其余3个参数的值都与土体的初始状态有关,因此可以方便地推广应用于实际工程中。相关成果可为研究土体的收缩特性提供一条新思路。
Shrinkage is a very important feature of expansive soil and it has a very important impact on subgrade disaster prevention and slope protection project.So far,many scholars have studied this subject and reached a lot of meaningful achievements.Based on the existing VSC model,we propose a shrinkage test fitting model for expansive soils of different initial states.We carry out fitting analysis for shrinkage tests of three practical projects by the model,and the fitting results are consistent with measured data,which verifies the applicability of the model.The model has four parameters of a,b,m and n.It shows that a preferable fitting result can be obtained even b is fixed at 0.02,and the parameters of a,m,n are related to the initial states of the soil.Based on these characters,the model is feasible to be applied in practical projects.
作者
戴明月
陈勇
王智炜
DAI Mingyue;CHEN Yong;WANG Zhiwei(College of Civil Engineering&Architecture,China Three Gorges University,Yichang 443002,China;Key Lab.of Geological Hazards on Three Gorges Reservoir Area,Yichang 443002,China)
出处
《人民长江》
北大核心
2018年第8期83-87,共5页
Yangtze River
基金
国家自然科学基金项目(51409149)
关键词
收缩试验
上覆荷载
干密度
干湿循环
收缩性
shrinkage test
overburden load
dry density
dry-wet cycle
shrinkage characteristic
