蓄能式真空预压排水系统及其节能效率

Energy-storage vacuum preloading system and its energy-saving efficiency

针对真空预压系统的高能耗问题,提出一种蓄能式真空预压排水系统,并通过室内单板真空预压排水试验,探究该系统的排水固结与节能效率。研究发现:真空室容积对该系统的排水固结效率存在一定影响,且对表层的影响大于深部,但与常规真空预压固结效率相差不大。该系统的节能效率与真空室容积密切相关,在试验条件下,对于功率1.5 kW、抽气速率7.2 m^(3)/h的真空泵,当真空室容积大于排水固结土体的孔隙体积约3‰时,该系统耗能比常规真空预压系统减少50%;真空室容积越大,节能效率越高。该研究可为解决真空预压系统的高能耗问题提供理论支撑。

To solve high energy loss in the vacuum preloading drainage system,we propose an energy-storage vacuum preloading system and probe into the drainage consolidation and energy-saving efficiency via vacuum preloading experiments with a single drainage board.It is found that the volume of the vacuum chamber has some influence on the vacuum consolidation efficiency,and the influence on the surface layer is greater than that on the deep layer.The consolidation efficiency of the proposed vacuum preloading system has little difference from that of the conventional one.The energy consumption of the vacuum system is closely related to the vacuum chamber volume.For the vacuum pump with a power of 1.5 kW and a pumping rate of 7.2 m^(3) /h,when the volume ratio of the vacuum chamber and pore in the soil is about 3‰,the energy consumption of the proposed system would be reduced by 50%.The larger the vacuum chamber volume is,the higher the energy-saving efficiency would be.This study can provide theoretical support for the reduction of high energy loss in the vacuum preloading system.