过湿土路基电渗排水低能耗逐级加载方法

Stepwise Loading Method of Electroosmotic Drainage with Low Energy Consumption for Over-wet Subgrade

摘要:

为提升电渗处置的能量利用效率，开展了不同加载方式和加载电势梯度的室内电渗排水试验，分析了能耗系数和瞬时能耗系数随排水时间和含水率的变化规律，提出了低能耗的过湿土路基电渗排水逐级加载方法。结果表明：电渗过程中能耗系数呈现先下降后上升的趋势；瞬时能耗系数最低时的加载电势梯度与平均含水率负相关，两者为幂函数关系；以此幂函数关系确定最优加载电势梯度的低能耗加载方式，较1.2 V?cm^-1稳压加载节约54%的能耗，较逐级加载节约23%的能耗。

Abstract:

In order to improve the energy utilization efficiency of electroosmotic drainage in over-wet subgrade， electroosmotic drainage laboratory tests with different loading methods and potential gradients were carried out， and the evolution characteristics of energy consumption coefficient and instantaneous energy consumption coefficient with time and water content were analyzed. Finally， a stepwise loading method with low energy consumption was proposed. The results show that the energy consumption coefficient initially declines and subsequently increases in electroosmotic drainage tests. The negative correlation between the loading potential gradient with the lowest instantaneous energy consumption coefficient and the average moisture content can be expressed by power function. The low energy consumption stepwise loading mode based on the power function can save 54% energy compared with the stable voltage loading at 1.2 V?cm^-1 and 23% energy compared with the traditional stepwise loading.