一种可测定变温下饱和-非饱和土水力学参数的实验装置  

An experimental device for determining hydraulic parameters of saturated and unsaturated soils under different temperature conditions

作　　者：曾磊[1,2,3] 段磊[1,2] 李万鹏[1,2] 乔晓英[1,2] 李俊亭[1,2] 

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]旱区地下水文与生态效应教育部重点实验室(长安大学),西安710054 [3]中国地质调查局西安地质调查中心,西安710054

出　　处：《河南水利与南水北调》2016年第4期142-146,197,共6页Henan Water Resources & South-to-North Water Diversion

基　　金：国家自然科学基金资助项目（41202178;41372260）; 教育部重点实验室开放基金（2014G1502024）

摘　　要：为了研究温度对饱和-非饱和土水力参数的影响,根据达西定律,研制了一种变温下饱和-非饱和土水力参数测定装置,该装置包括实验筒、供水与回水系统和数据采集系统。该装置可以获得不同温度下饱和渗透系数、给水度和土壤水分特征曲线、非饱和渗透系数、比容水量和扩散率等参数,进一步可以获得这些参数与温度的数学表达式;该实验装置所用试样大,减少了小试样测试结果的随机性,且测定参数多、自动化程度高,具有推广应用价值。In order to study the effect of temperature on the saturated-unsaturated hydraulic parameters,the measurement device for determining hydraulic parameters of saturated-unsaturated soils under variable temperature was developed based on Darcy′s law,which contained test column,water supply and return system,and data acquisition system.The device could obtain the saturated permeability coefficient,water and soil water characteristic curve,and unsaturated permeability coefficient parameters,the water capacity and the diffusion rate at different temperatures.Then,the mathematical expressions of temperature and these parameters could be further obtained.In addition,it was shown that the high automatic degree device had popularization and application value for large samples to reduce the randomness of the small sample and determined the parameters of saturated-unsaturated soils.

关 键 词：饱和-非饱和土 水力参数 温度 达西定律 

分 类 号：TU411[建筑科学—岩土工程]