论文部分内容阅读
有效采用TDR技术测试土体含水率的关键在于建立介电常数与体积含水率之间的定量关系,目前常用的介电常数与体积含水率之间的Topp经验关系式是建立在低盐分环境下较低含水率条件下的。通过一系列室内试验,探讨了高含盐量环境下高含水率海相淤泥的介电常数与体积含水率的关系。研究结果表明,Topp经验关系式不适用于含盐量为1.5%～4.5%和质量含水率为120%～320%的海相疏浚淤泥。为了快速连续测试海相疏浚淤泥含水率,提出了一种基于w/θ和w/k坐标系定量分析介电常数与含水率关系的新方法,建立了w/θ与w/k的线性关系式,明确了高盐分环境下高含水率疏浚淤泥的介电常数与含水率之间有很好的相关性。同时采用他人已有的试验数据进一步验证了这种方法的有效性。
The key to effectively using TDR to test soil water content is to establish the quantitative relationship between dielectric constant and volumetric water content. The most commonly used Topp empirical relationship between dielectric constant and volumetric water content is based on low salinity conditions Lower moisture content. Through a series of laboratory tests, the relationship between the dielectric constant and volumetric water content of high-moisture marine silt under high salt content was discussed. The results show that Topp empirical relation does not apply to marine dredged silt with salt content of 1.5% -4.5% and mass moisture content of 120% -320%. In order to quickly and continuously test the moisture content of marine dredged sludge, a new method of quantitatively analyzing the relationship between dielectric constant and water content based on the w / θ and w / k coordinates was proposed and a linear relationship between w / θ and w / k It is clear that there is a good correlation between the dielectric constant and moisture content of dredged sludge with high water content under high salinity conditions. At the same time, the experimental data of others have been used to further verify the effectiveness of this method.