Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Detection of Layered Diesel-Contaminated Sands
Underground contamination by nonaqueous phase liquids (NAPLs) is increasingly serious. Rapid and reliable detection of contaminated zone and degree is the first step to site remediation. In this paper, diesel and fine sand are used as experimental materials to investigate the applicability of using time-domain reflectometry (TDR) to detect layered diesel-contaminated sands. The major work includes (1) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between saturated sand layers; (2) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between dry sand layers; and (3) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between a saturated sand layer and a dry sand layer. The experimental results show the following: (1) A significant decrease in dielectric constant is observed after a diesel-contaminated layer is sandwiched in saturated sand and (2) the interfaces between the diesel-contaminated layer and the saturated sand layer can be identified by analyzing the reflection waveform. The findings obtained in this paper provide guidance for the use of TDR for the field investigation of layered NAPLs contaminated site.
Detection of Layered Diesel-Contaminated Sands
Underground contamination by nonaqueous phase liquids (NAPLs) is increasingly serious. Rapid and reliable detection of contaminated zone and degree is the first step to site remediation. In this paper, diesel and fine sand are used as experimental materials to investigate the applicability of using time-domain reflectometry (TDR) to detect layered diesel-contaminated sands. The major work includes (1) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between saturated sand layers; (2) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between dry sand layers; and (3) measurement of reflection waveform and dielectric constant for specimens with a diesel-contaminated layer sandwiched between a saturated sand layer and a dry sand layer. The experimental results show the following: (1) A significant decrease in dielectric constant is observed after a diesel-contaminated layer is sandwiched in saturated sand and (2) the interfaces between the diesel-contaminated layer and the saturated sand layer can be identified by analyzing the reflection waveform. The findings obtained in this paper provide guidance for the use of TDR for the field investigation of layered NAPLs contaminated site.
Detection of Layered Diesel-Contaminated Sands
Zhan, Liang-tong (Autor:in) / Mu, Qingyi (Autor:in) / Chen, Yunmin (Autor:in)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 2042-2051
24.02.2014
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Detection of Layered Diesel-Contaminated Sands
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