The air-booster vacuum preloading method is considered a reasonable choice for alleviating clogging problems. However, research on the air-boost mode during the early consolidation stage is still lacking. In this study, a series of comparative experiments were designed to investigate the effects of applying different pressures and durations on the consolidation characteristics of dredged soil and clogging at two consolidation stages using indoor model tests and microscopic tests. The experimental results showed that the air-boost modes of low pressure and short duration should be adopted during the early consolidation stage, and as the continuous consolidation, the pressure and duration should be increased. Moreover, early gas injection had a more significant effect on alleviating clogging of the prefabricated horizontal drain (PHD), and the pore diameter of dredged soil was also smaller. The research results are an important guide for air-booster vacuum preloading to dewater high-moisture dredged soil.

空气增压真空预压方法被认为是缓解堵塞问题的合理选择。然而，对于早期固结阶段的空气增压模式的研究还很缺乏。本研究设计了一系列对比试验，通过室内模型试验和微观试验，研究施加不同压力和持续时间对疏浚土的固结特性和两个固结阶段的堵塞特性的影响。试验结果表明，固结初期宜采用低压、短持续时间的充气方式，随着固结的继续进行，应增加压力和持续时间。而且，早期注气对缓解预制水平排水管（PHD）堵塞的效果更显着，疏浚土的孔径也更小。研究成果对空气增压真空预压高湿疏浚土脱水具有重要指导意义。