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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 results of the physicochemical and mechanical analysis of the mudshed near the Changzhi Island are as follows: the water content of the marine mud-blowing mud is high, the initial porosity ratio is large, and the initial ultimate shear strength is low; The high salinity of the mud and the large amount of ion exchange result in the microscopic particles being surrounded by the thicker diffusing water film. The thicker water film between the soil particles and the anisotropic overloading will exacerbate the volume deformation of the blowing filler, Intergranular structure. In the natural state, the structural features of “sheet-pile-sheet pile” filled with mud are extremely obvious. The microscopic-mesoscopic structure is extremely unstable. If the salt minerals degrade and precipitate, the solid phase skeleton will be localized Destruction. In this paper, the study on in situ marine soils in Changzhi Island of Zhoushan can understand the characteristics of the purging and filling of mud so as to provide a scientific basis for the application of vacuum pre-drainage drainage consolidation technology to the land reclamation within the area.