密实型聚氨酯混合料蠕变特性研究  

Research on Creep Characteristics of Dense Polyurethane Mixture

作　　者：张淇生 张倩[1,2,3] 王善坤 裴晓梅 ZHANG Qisheng;ZHANG Qian;WANG Shankun;PEI Xiaomei(College of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an,Shaanxi 710055,China;ShaanxiKey Laboratory of Geotechnical and Underground Space Engineering,Xi'an University of Architecture and Technology,Xi'an,Shaanxi 710055,China;Engineering Research Center of Green Construction&Smart Maintenance of Urban Infrastructure,Universities of Shaanxi Province,Xi'an,Shaanxi 710055,China;Xi'an Highway Bureau,Xi'an,Shaanxi 710003,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学陕西省岩土与地下空间工程重点实验室,陕西西安710055 [3]城市基础设施绿色建造与智慧运维陕西省高校工程研究中心,陕西西安710055 [4]西安市公路局,陕西西安710003

出　　处：《公路工程》2025年第1期186-196,共11页Highway Engineering

基　　金：陕西省交通运输厅2023年度交通运输科研项目(23-25R);浙江省公路与运输管理中心科技计划项目(2019H01);衢州市科技计划项目(2019K39)。

摘　　要：通过在不同温度及应力条件下进行单轴静载蠕变试验,探讨了密实型聚氨酯混合料应力应变的变化。通过分析蠕变曲线获得不同温度下的蠕变柔量曲线,并将其与七参量模型的拟合结果进行比较。研究结果表明,试验数据与模型拟合结果相对吻合。基于七参量模型,进一步分析了聚氨酯路面在不同温度、荷载及路面组合类型条件下的竖向应力、剪应力、路面应变。结果表明,荷载对竖向应力和剪应力具有显著影响,且竖向变形主要在表层发生。这一发现表明密实型聚氨酯混合料在用作路面材料时具有较优越的抗变形性能。The stress-strain variations of thick polyurethane mixture were investigated using uniaxial static creep experiments at various temperatures and stress levels.Analyze the creep curves to get creep compliance curves at different temperatures,and compare them to the fitting findings of the seven-parameter model.According to the research findings,the experimental data is reasonably compatible with the model fitting results.Further investigation of the vertical stress,shear stress,and pavement strain of polyurethane pavement under varied temperature,load,and pavement combination conditions was performed using the seven-parameter model.The results show that the load has a substantial influence on vertical stress and shear stress and that vertical deformation occurs mostly in the surface layer.This finding suggests that dense polyurethane mixture have superior deformation resistance when utilized as road materials.

关 键 词：密实型聚氨酯混合料 蠕变试验 七参量模型 模型参数 抗变形性能 

分 类 号：U414[交通运输工程—道路与铁道工程]