不同处理方法下吹填土微观结构特征  

Microstructure Features for Dredger Fill by Different Solidified Technologies

作　　者：王清[1] 孙明乾[1] 孙铁[2] 孙涛 

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]建设综合勘察研究设计院有限公司,北京100007 [3]天津滨海建设投资集团,天津300450

出　　处：《同济大学学报（自然科学版）》2013年第9期1286-1292,共7页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(41172236;40372122);国家自然科学基金国际合作项目(40911120044)

摘　　要：以天津滨海新区吹填土为研究对象,用X射线衍射分析方法确定吹填土中的矿物成分,并结合扫描电子显微镜微观结构照片,利用WD-5图像处理系统对土体的微观结构作定量分析,讨论两种不同加固处理方法下天津滨海新区吹填土结构单元体、孔隙的丰度和定向频率等评价指标的变化情况.试验分析表明,经过排水处理后,孔隙率变小,土中结构单元体从较为松散的状态转变为团聚状态,孔隙也随之进行调整,孔隙数量减少,定向性逐渐不明显,土体固结程度变高.With the dredger fill in Tianjin Binhai New Area as study object, the mineral composition is identified by X-ray diffraction approach, and the microstructure is studied by scanning electronic microscope （ SEM ） along with quantificational analysis of the microstructure on the basis of WD-S picture processing system. And then the changing of evaluation indicators by two different reinforcement approaches, such as the size of structure element and pore, abundance, and directional frequency are discussed. The conclusion indicates that after water drainage treatment, the porosity becomes smaller, the dispersed structural elements of soil become agglomerated elements, displaying a variety of oblate. Simultaneously, the pores in the soil diminishe and lose balance, and the directing property becomes indistinct. Consolidation degree of soil becomes higher.

关 键 词：吹填土 微观结构 定量分析 

分 类 号：P642.13[天文地球—工程地质学]