基于电磁波的路基含水量试验研究
|
摘要
基于土体含水量对介电常数的影响,采用电磁波法进行路基含水量的快速测定。通过分析并总结电磁波测试土体含水率已经取得的成果,设计了一种路基含水率的电磁波试验方法,并用这种方法进行室内试验,得到了土体含水率与介电常数的对应关系式。同时,通过电磁波对不同含水量土体的测试,分析了电磁波幅值和介电常数的变化规律,结果表明利用厚度法对不同含水率的介电常数进行分析合理可行,试验结果为实现电磁波进行路基含水量快速无损检测提供依据。
Based on the influence of soil water content on the dielectric constant, the electromagnetic wave method is used to quickly measure the water content of roadbed. According to the analysis and summary of the achievements of soil water content measured by the electromagnetic wave method, an electromagnetic wave experimental method for the water content of roadbed is designed. And this method is used to carry out the laboratory experiment. The corresponding relation between the soil water content and the dielectric constant is obtained. At the same time, through the measurement of the different water contents of soil body by electromagnetic wave, this paper analyses the change rules of electromagnetic amplitude value and dielectric constant. The experiment result provides the basis for realizing the rapid non-destructive testing of roadbed water content by the electromagnetic wave
Based on the influence of soil water content on the dielectric constant, the electromagnetic wave method is used to quickly measure the water content of roadbed. According to the analysis and summary of the achievements of soil water content measured by the electromagnetic wave method, an electromagnetic wave experimental method for the water content of roadbed is designed. And this method is used to carry out the laboratory experiment. The corresponding relation between the soil water content and the dielectric constant is obtained. At the same time, through the measurement of the different water contents of soil body by electromagnetic wave, this paper analyses the change rules of electromagnetic amplitude value and dielectric constant. The experiment result provides the basis for realizing the rapid non-destructive testing of roadbed water content by the electromagnetic wave
引文
[1]孙军,应后强,王国群,等.探地雷达在公路检测中的应用[J].公路,2001(3):59-61.
[2]刘恒柏,朱安宁,张佳宝.不同水分条件下粗砂土剖面中目标物的GPR图像特征及其解译[J].土壤,2009(1):112-117.
[3]Huisman JA,Hubbard S S,Redman JD,etc.Measuringsoil water contentwith ground penetrating rada[J].Areview,Vadose ZoneJ,2003(2):476-491.
[4]KEY W S.Borehole Geophysics Applied to Ground Water Investigations[M].Worth ington:National Water Well Association,1998.
[5]CHANCY,KINGHT R J.Determining water content and saturation from dielectric measurem ent in layeredmar terial[J].Water ResourceResearch,2001,35(1):85-93.
[6]GROTEK,HUBBARDSS,RUBINY.Field scale esti mation of volumetric water content using GPR ground wave techniques[J].Water Resource Research,2003,139(11):13-21.
[7]Jacobsen OH,Schjnning P.comparison of TDR calibration functions for soil water determination Proc Time Domain Reflectometry,Applications in soil science[Z].Denmark:ResearchCentre Foulum,1994.
[2]刘恒柏,朱安宁,张佳宝.不同水分条件下粗砂土剖面中目标物的GPR图像特征及其解译[J].土壤,2009(1):112-117.
[3]Huisman JA,Hubbard S S,Redman JD,etc.Measuringsoil water contentwith ground penetrating rada[J].Areview,Vadose ZoneJ,2003(2):476-491.
[4]KEY W S.Borehole Geophysics Applied to Ground Water Investigations[M].Worth ington:National Water Well Association,1998.
[5]CHANCY,KINGHT R J.Determining water content and saturation from dielectric measurem ent in layeredmar terial[J].Water ResourceResearch,2001,35(1):85-93.
[6]GROTEK,HUBBARDSS,RUBINY.Field scale esti mation of volumetric water content using GPR ground wave techniques[J].Water Resource Research,2003,139(11):13-21.
[7]Jacobsen OH,Schjnning P.comparison of TDR calibration functions for soil water determination Proc Time Domain Reflectometry,Applications in soil science[Z].Denmark:ResearchCentre Foulum,1994.