高聚物注浆材料密度与力学行为关系研究  

Study on Relationship Between Density and Mechanical Behavior of High Polymer Grouting Materials

作　　者：郑新国[1] 李书明[1] 谢永江[1] 曾志[1] 翁智财[1] 刘竞[1] 杨德军[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《武汉理工大学学报》2014年第4期44-47,共4页Journal of Wuhan University of Technology

基　　金：中国铁路总公司科技研究开发计划(2013G008-D);中国铁道科学研究院基金(2011YJ84;2011YJ86);上海铁路局科研项目(HHKZ2013-01)

摘　　要：通过一种反向约束固化的工艺制备了密度不同的高聚物注浆材料,采用三点受力弯曲加载的试验和单向压缩试验对不同密度聚氨酯高聚物注浆材料结构体的弯曲、压缩特性进行了系统研究。结果表明:高聚物注浆材料结构体的弯曲强度、压缩强度随高聚物密度的增加而增大,同时,材料结构体的弯曲强度、压缩强度随着密度的增加分别呈二次函数和线性函数增加;而弯曲变形能力随密度的增加而降低。采用孔结构模型对上述力学行为进行了分析。工程实践中应根据拟处理铁路线路的轨道结构型式、实际受力、变形特点等综合考虑选取与之匹配、密度适宜的高聚物注浆材料。研究成果为在受弯曲荷载工况下高聚物注浆材料的选材与应用提供了重要依据。The high polymer materials with different density were made in the process of reversed constraint. The mechanical properties of different density high polymer grouting materials were systematically studied using three-point bending load test and uniaxial compression test. Results showed both the bending and compressing strengths increased with the increase of the density of high polymer materials, meanwhile, the bending and compressing strength increased with the increase of density of a quadratic function and linear function respectively, while the deformability reduced with the increase of the density. The mechanical behaviors for high polymer materials were analyzed by the model of micro pore structure. In engineering practice, when the structures formed by high polymer materials suffer bending and compressing loads, the appropriate density of high polymer grouting material should be chosen according to the type of ballastless track, the forces of the structure and deformation characteristics. Research also provides an important reference for the high polymer grouting material selection and application when used in the bending load case.

关 键 词：高聚物 弯曲 压缩 强度 变形能力 

分 类 号：TU744[建筑科学—建筑技术科学]