摘要
针对非饱和土重力势按饱和土重力势考虑的不足,自制水分迁移试验装置,对重力势作用下非饱和黄土水分迁移规律进行了试验探讨。试验得到不同密实度土体在重力势作用下含水率的分布规律,并根据基质吸力与含水率的关系式算得不同位置土体的基质吸力值,结果揭示出按照传统重力势计量方法确定非饱和土体的重力势不符合能量守恒。非饱和土体重力势应考虑土体密实度影响,根据土体饱和度等参数对其重力势进行折减。
This thesis discusses the moisture migration discipline of unsaturated loess soil under the effect of gravitational potential through experiment with self-made moisture migration arrange- ment regarding the shortcoming of gravitational potential of unsat- urated soil considered as saturated soil. The experiment result ar- gues that the distribution pattern of moisture content of different soil densities under the effect of gravitational potential obtained by the experiment, the matrix suction values of soil in different posi- tions calculated with the relation of matrix suction and moisture content reveal that the gravitational potential of unsaturated soil de- termined by traditional metering method of gravitational potential does not conform to principle of conservation of energy. The gravi- tational potential of unsaturated soil should consider the impact of soil density and should be reduced based on soil saturation and oth- er parameters.
出处
《西部探矿工程》
CAS
2014年第3期1-5,共5页
West-China Exploration Engineering
基金
黄土窑洞地区窑毁灾害发生机理及防对策研究国家自然基金项目(No.50678144)
关键词
非饱和土
黄土
重力势
含水率
水分迁移
unsaturated soil
loess
gravitational potential
mois-ture content
moisture migration
