间歇式真空预压处理高含水率疏浚泥模型试验  

Model Test of Intermittent Vacuum Preloading Treatment of Dredged Slurry with High Water Content

作　　者：韩启元 徐桂中[2] 李明东 翁佳兴 HAN Qi-yuan;XU Gui-zhong;LI Ming-dong;WENG Jia-xing(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;School of Civil Engineering,Yancheng Institute of Technology,Yancheng 221051,China;Jiangsu Hongji Water Source Technology Co.,Ltd.,Yangzhou 225002,China)

机构地区：[1]东华理工大学土木与建筑工程学院,南昌330013 [2]盐城工学院土木工程学院,江苏盐城221051 [3]江苏鸿基水源科技股份有限公司,江苏扬州225002

出　　处：《长江科学院院报》2023年第4期113-118,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(52078449);江苏南水北调科技项目(JSNSBD201910)。

摘　　要：为明确间歇式真空加载方式对真空预压处理高含水率疏浚泥加固效果的影响,对不同真空加载方式下的疏浚泥开展室内模型试验,研究了不同真空间歇时长下疏浚泥的处理效果,并探讨了间歇式真空引起疏浚泥处理效果改变的机理。结果表明:与传统恒定真空加载方式相比,采用间歇式真空可降低土颗粒的迁移,提高真空在土中的传递效率,从而改善真空预压处理后疏浚泥的加固效果。对本研究所用疏浚泥,采用间歇6 h的真空加载方式处理效果最佳。相比传统真空预压方式,疏浚泥的累计出水量提升26.8%,十字板剪切强度提高36.7%,土体含水率降低18.9%,间歇式真空预压法处理高含水率疏浚泥效果更佳。The aim of this research is to make clear the influence of intermittent vacuum loading pattern on the effectiveness of vacuum preloading treatment of dredged mud with high moisture content.We conducted indoor model tests by changing the intermittence and discussed the mechanism of intermittent vacuum in treating dredged mud.Compared with traditional constant vacuum loading method,intermittent vacuum can reduce the migration of soil particles and improve the transfer efficiency of vacuum in soil,thus improving the reinforcement effect.The dredged mud used in this study is best treated by vacuum loading with intervals of 6 hours.Compared with that of traditional vacuum preloading method,the cumulative water yield of dredged mud by the present method increases by 26.8%,shear strength of cross plate increases by 36.7%,and water content of soil reduces by 18.9%.Intermittent vacuum preloading method is more effective in treating dredged slurry with high water content.

关 键 词：疏浚淤泥 间歇式真空预压 模型试验 出水量 排水板淤堵 

分 类 号：TU472[建筑科学—结构工程]