【摘要】 针对现阶段传统真空预压法中由真空度衰减引起的疏浚淤泥加固效果不理想等问题，提出正反交替式真空预压法，通过交替改变真空作用点提升下部土体内真空压力。为探究不同交替频率对正反交替式真空预压法加固效果的影响，通过一系列室内模型试验展开研究。结果表明，不同交替频率会影响正反交替式真空预压法的加固效果，其中当交替频率为10d/次时加固效果最优，加固后土体的平均十字板抗剪强度达到25.2kPa，平均含水率降至37.8%。更多还原

【Abstract】 In response to the current issues in traditional vacuum preloading methods,such as the unsatisfactory reinforcement effect of dredged slurry caused by vacuum decay,positive and negative alternate vacuum preloading method was proposed.The method enhances the bottom soil vacuum pressure by alternate change vacuum action point.To explore the impact of different alternating frequencies on the reinforcement effect of the positive and negative alternate vacuum preloading method,research was conducted through a series of laboratory model experiments.The results show that different alternating frequencies affect the reinforcement effect of the positive and negative alternate vacuum preloading method.Among them,the optimal reinforcement effect is achieved when the alternating frequency is 10 days per time,the renforced soil with the average vane shear strength reaching 25.2 kPa and the average moisture content dropping to 37.8%.更多还原