竖向真空预压作用下海相软土饱和度传递机理研究  

Study on Saturation Transfer Mechanism of Marine Soft Soil under Vertical Vacuum Preloading

作　　者：朱俊樸 周志鸿 ZHU Junpu;ZHOU Zhihong(Engineering Project Construction Affairs Center of Zhongshan Cuiheng New District,Zhongshan 528400,Guangdong,China;Changda Municipal Engineering(Guangdong)Co.,Ltd.,Zhongshan 528400,Guangdong,China)

机构地区：[1]中山翠亨新区工程项目建设事务中心,广东中山528400 [2]长大市政工程(广东)有限公司,广东中山528400

出　　处：《路基工程》2022年第5期81-85,共5页Subgrade Engineering

摘　　要：由于对固结过程中预制竖向排水板(PVD)周围海相软土的非饱和状态相关研究尚不够系统,制约了真空预压法的处理效果。通过模型试验,测量试验过程中真空吸入压力、孔隙压力和含水量沿径向和竖向的变化等,将其与固结过程中孔隙比的变化相联系,探讨海相软土在竖向真空预压过程中饱和度的变化。结果表明:竖向真空预压过程中,饱和度变化对泥化带的形成起着重要作用,并通过该作用进一步影响海相软土的改良效果。The relevant research on the unsaturated state of marine soft soil around prefabricated vertical drainage panels(PVD) during the consolidation process is not systematic enough, which restricts the treatment effect of the vacuum preloading method. By model tests, the changes of vacuum suction pressure, pore pressure and water content along the radial and vertical directions were measured during the test. And it is related to the change of void ratio during the consolidation process, and the change of saturation of marine soft soil in the process of vertical vacuum preloading is discussed. The results show that the change of saturation plays an important role in the formation of argillization zone during the vertical vacuum preloading process, and further affects the improvement effect of marine soft soil through this effect.

关 键 词：真空预压法 饱和度 海相软土 传递机理 孔隙比 

分 类 号：TU471.8[建筑科学—结构工程]