工程科学与技术2018，Vol.50Issue(2)：77-83,7.DOI:10.15961/j.jsuese.201700680
膨胀性土壤饱和水分运动参数计算模型
Swelling Soil Saturated Water Movement Parameters Calculating Models
摘要
Abstract
The soil swelling deformation will happen when swelling soils absorb water.Swelling soils are widely distributed in the world,which have complex hydrological characteristics and mechanical properties,and have significant influence on the national economy.As the current re-search on soil water movement is mostly aimed at non-swelling soil,the related research results are not suitable for describing the process of swell-ing soil water movement.Consequently,it is of great practical and theoretical significance to carry out the study of swelling soil moisture move-ment.The soil swelling deformation is mainly the result of the combined effect of the soil swelling pressure and self-weigh stress,and the stress and deformation characteristics of swelling soils vary with the soil depth.To quantify the effect of the soil swelling deformation on water move-ment parameters,the calculating models of parameters including saturated water content,saturated water conductivity and saturated ratio of volume were established by using soil swelling characteristic curve and soil stress-strain relationship curve.Then,Loessial soil and Lou soil were selected as typical swelling soils,and their saturated water movement parameters in different soil thickness were measured based on the indoor experiment,and the applicability and reliability of the parameters were verified.The results show that the relative error are less than 10%,RSME are less than 0.07,and Nash efficiency coefficient are larger than 0.85 between the observed and predicted values of the three parameters,which in-dicates that the calculating models can be applied to simulate swelling soil saturated water movement parameters.The results enrich the theoretic-al research of soil water movement,and provide reference for swelling soil water utilization and management.In future,to improve the perform-ance of the model,the effect of the soil swelling pressure and self-weigh stress on saturated water movement parameters under different initial wa-ter content and different initial bulk density needs to be explored.关键词
膨胀性土壤/土壤水分运动/饱和含水量/饱和导水率/饱和比容积Key words
swelling soils/soil water movement/soil saturated water content/soil saturated hydraulic conductivity/soil saturated ratio of volume分类
建筑与水利引用本文复制引用
甘永德,刘欢,贾仰文,牛存稳,仇亚琴,魏娜..膨胀性土壤饱和水分运动参数计算模型[J].工程科学与技术,2018,50(2):77-83,7.基金项目
"流域水循环模拟与调控"国家重点实验室自主研究课题资助项目(2016ZY03) （2016ZY03）
国家重点基础研究发展计划资助项目(2015CB452701) （2015CB452701）
国家自然科学基金资助项目(51379215 （）
51779272) （）
