多种计算方法确定黄土渗透系数的对比分析  

Variety of Calculation Methods on Determining the Comparative Analysis of the Permeability Coefficient

作　　者：李开超[1] 范寒光 高术孝 

机构地区：[1]机械工业勘察设计研究院,陕西西安710043

出　　处：《岩土工程技术》2012年第3期145-148,共4页Geotechnical Engineering Technique

摘　　要：渗透系数是工程降水设计重要的水文地质参数之一,由于水文地质本身的复杂性和计算的多样性,致使渗透系数计算值往往存在着较大的差异。而对于渗透系数的计算模型较多,究竟哪种数学计算模型比较接近黄土渗透性的实际情况,不同的专家有不同的观点。以西安地铁四号线火车站地下车站段抽水试验为例,运用了完整井稳定流中的单井法、带观测井法考虑井损的单井法数学计算模型,非完整井稳定流数学计算模型,水位恢复法数学计算模型3种方法综合确定黄土的渗透系数。分析对比了各种数学计算模型优缺点,给出了计算黄土渗透系数较为合理的数学计算模型。Permeability coefficient is an important engineering design precipitation of hydro--geological parameters, Due to the complexity of the hydrogeological and their diversity, resulting in the calculation of permeability coefficient values often lead to big differences. In this paper,Xi＇an Metro Line＇t train station pumping test, the related using complete steady stream of well single well method with observation wells mathematical model, also considering the single--well well the complete loss of mathematical model of steady flow non- complete mathematical model of steady flow wells, water level recovery method mathematical model of an integrated three methods to determine the permeability of loess. Analyzing and comparing the advantages and disadvantages of various mathematical models, equations for calculating the permeability coefficient of loess more reasonable mathematical model.

关 键 词：黄土 渗透系数 稳定流 抽水试验 

分 类 号：P641.73[天文地球—地质矿产勘探]