疏浚泥水混合物电导率特性初探

为论证电导率测试法用于测定疏浚泥浆浓度的可行性,探讨疏浚泥浆电导率与泥浆浓度间的关系及影响因素,选取国内较有代表性的淤泥质土、粉土、粉砂以及细砂等疏浚泥样,配置成不同浓度的混合物,测试了配置混合物的电导率以及温度和盐度对混合物电导率的影响.试验结果表明:混合物中水的盐度、泥沙体积浓度、混合物温度等参数与混合物电导率存在明显的相关关系；泥沙粒径级配对混合物电导率也有一定影响.因此,通过电导率测试法用于测定疏浚泥浆浓度是可行的,但须注意对混合物温度和盐度的影响进行补偿或相关处理.

Primary study on conductivity characteristics of dredging soil-water mixture

Several representative dredging materials in China, including muddy soil, silt, silty sand, and find sand, are selected and tested, to analyze and discuss the relationship between conductivity and concentration of dredging soil-water mixture and its influencing factors, also the feasibility of dredging slurry concentration determination by conductivity testing method. The conductivity of selected slurries with different concentration is tested, as well as the impacts of temperature and salinity on slurry conductivity. The results show that there is evident correlation relationship between slurry conductivity and its salinity, volume concentration, temperature. Moreover,sediment particle size gradation also has certain impact on slurry conductivity. Thus, it is feasible to determine slurry concentration by measuring its conductivity, when the influencing factors, such as salinity and temperature, are compensated or treated.