舟山近海海相吹填泥浆的性状研究及处理技术建议  

Study on Properties of Marine Dredged Slurry in the Zhoushan Offshore Area and Suggestions for Treatment Techniques

作　　者：熊站 汪明元 祝幸 宋寅威 王友博 王亚军 可健伟 王晋宝 马惠彪 

机构地区：[1]浙江海洋大学港航与交通运输工程学院,浙江舟山316002 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]舟山市水利勘测设计院,浙江舟山316000

出　　处：《海岸工程》2017年第3期58-63,共6页Coastal Engineering

基　　金：国家自然科学基金项目--基于模糊随机损伤力学的混凝土高坝抗震安全评价研究(51109118);中国电建集团华东水利水电勘测设计研究院基础研究课题--围海造路工程中大规模吹填泥浆快速排水固结技术的模型试验与研究(21188006615)

摘　　要：通过对临近长峙岛一侧的海相吹填泥浆的物理化学及力学分析,结果表明:海相吹填泥浆的含水率高,初始孔隙比大,初始极限抗剪强度低;海相吹填泥浆含盐量高,且离子交换量偏大,致使微观颗粒被较厚的扩散水膜所包围;土粒骨架间的水膜较厚,各向异性的超载会加剧吹填料的体积变形,破坏粒间结构;天然状态下吹填泥浆的"片架-片堆"结构特征极为显著,微观-介观结构极不稳定,若盐类矿物出现降解、析出,其固相骨架将被局部化破坏。本文对舟山长峙岛海域的原位海洋土的研究可以了解吹填泥浆的性状,以期为真空预压排水固结技术用于区域内围海造陆工程提供科学依据。The analyses of physical chemistry and mechanical properties of marine dredged slurry in the sea area off the Changzhi Island of Zhoushan indicate that the marine dredged slurry has high water content rate,large initial void ratio and low initial limit shear strength,and that the salt content and the ion exchange capacity of the marine dredged slurry are so high that the micro-particles of the slurry are surrounded by a thicker diffusion water film.Because the water film between the soil particle skeletons is thicker,the anisotropy overloading will aggravate the volume deformation of the dredged materials and destroy the interparticle structure.In the case of natural state,the characteristics of flocculated-dispersed structures of the dredged slurry are extremely remarkable and the microscopic-mesoscopic structures are very unstable.If the saline minerals degrade and precipitate,the solid skeleton of the slurry will be destroyed locally.Through this study,the properties of the dredged slurry in the sea area off Changzhi Island could be understood and a scientific basis would be provided for the application of the vacuum preloading drainage consolidation technique to the regional sea reclamation projects.

关 键 词：围海造路 海相吹填泥浆 性状 真空预压 

分 类 号：TU411[建筑科学—岩土工程]