西湖泥炭质土微观结构和矿物组成分析  

The Analysis of the Micro Structure and Mineral Components of the West Lake Mud Soil

作　　者：王方中[1] 赵朝发[1] 张珏[2] 林锦涛[2] 

机构地区：[1]浙江大学建工学院土木系,浙江杭州310058 [2]杭州市园林文物局钱江管理处,浙江杭州310058

出　　处：《公路工程》2013年第4期178-182,共5页Highway Engineering

摘　　要：以西湖泥炭质土为研究对象,取不同深度的土进行分析。利用扫描电镜试验(SEM)、X射线衍射(XRD)和X射线能谱仪(EDS)对泥炭质土进行微观结构观察、测定土中常见的微量元素并计算其相对百分比,分析了该土的微观结构组成和矿物成分。实验结果表明:泥炭质土表层(6 m)主要由水云母和二八面体蒙皂石组成,中部(10 m)主要由三八面体绿泥石和二八面体蒙皂石组成,底层(10 m)主要由三八面体绿泥石和二八面体蒙皂石组成。泥炭质土微观结构比较疏松,由土体基质和基质间胶结矿物组成,并存在着大量的孔隙。这决定了泥炭质土物理、力学性质极差,并能很好的说明泥炭质土的流动性。Different depth of The west lake mud soil is taken as the research and analyzed object.Using scanning electron microscope test（SEM） and X-ray diffraction（XRD） and energy dispersive Xray spectrometer instrument（EDS） to silt soil microstructure observation.Setting out the common trace elements of the soil and then calculate its relative percentage to analyze the soil micro-structure of the composition and mineral composition.The experiment results show that the surface mud soil（6 m） is mainly composed by hydrous mica and two octahedral smectite,the central（10 m） is mainly composed by trioctahedral chlorite and two octahedral smectite,the bottom（10 m） mainly composed by trioctahedral Green debris and two octahedral Mongolia soapstone.The mud soil microstructure is loose,composed of the soil matrix and cement minerals,and existing a lot of porosity.Which determines the mud soil physical and poor mechanical properties and good description of the mobility of the muddy soil.

关 键 词：泥炭质土 扫描电镜 X射线衍射 X射线能谱分析 

分 类 号：TU411.1[建筑科学—岩土工程]