摘要
为掌握孔隙介质级配和均匀性对水源热泵回灌过程中堵塞的影响,通过室内回灌试验测定了不同级配试样回灌渗透能力,利用颗粒级配分形维数分析了试样级配和不均匀性与回灌渗透性能的相关关系。结果表明级配分形维数D与不均匀系数的对数(lnC u)之间呈负相关,与渗透系数和孔隙度n则呈正相关。从而为不同水文地质条件地区水源热泵工程的适宜性分析,回灌堵塞机理的分析以及防止水源热泵工程堵塞技术的选择提供了一定的科学依据。
In order to grasp the influences of the gradation and uniformity of the porous media on the recharge clogging of water source heat pump, the recharge permeability of different grading samples are determined through the laboratory recharge tests, and the relationship between the grading and nonuniformity of the samples and the recharge permeability is analyzed by using the fractal dimension of the particle size distribution. The testing results show a negative correlation between the grading fractal dimension D and the logarithm of the coefficient of nonuniformity （ lnCu） and a positive correlation between the grading fractal dimension and the coefficient of permeability and porosity n, which provide the scientific basis for the suitability analysis on water source heat pump works in different hydrogeological conditions, the analysis on the recharge clogging mechanism and the choice of avoiding the clogging technique of the water source heat pump works.
出处
《工程勘察》
2014年第2期31-34,共4页
Geotechnical Investigation & Surveying
基金
国家自然科学基金项目(41072190)
关键词
多孔介质
分形
回灌渗透性
回灌堵塞
porous media
fractal
recharge permeability
recharge clogging
