Polyurethane grouting materials are new repairing and impermeable materials for infrastures especilly in rush to repair. Aiming at dynamic viscoelastic properties of the new-type mateials, firstly, the dynamic viscoelastic properties of polyurethane grouting materials was studied by Dynamic Mechanical Thermal Analysis. Then the influential factors for these properties were studied and the mechanism behind their changes were analysed from a microscopic perspective. In addition, the high and low temperature performance and application areas of polymer materials were also studied for their application region. Then, a viscoelastic constitutive model of new-type mateials based on the generalised Maxwell model (GMM) was established for further dynamic structure analysis and the model was verified by a dynamic centrifuge test. Furthermore, the accuracy of the model was compared with that of a linear elastic model. The results of this study provide a scientific basis for the application and development of polyurethane grouting technology for applications.

聚氨酯灌浆材料是用于急需修复的基础设施的新型修复和防渗材料。针对新型材料的动态粘弹性，首先通过动态力学热分析法研究了聚氨酯灌浆材料的动态粘弹性。然后研究了影响这些性能的因素，并从微观角度分析了其变化的机理。另外，还研究了高分子材料的高温和低温性能及其应用领域。然后，基于广义麦克斯韦模型（GMM）建立了新型材料的粘弹性本构模型，用于进一步的动态结构分析，并通过动态离心试验对该模型进行了验证。此外，将模型的准确性与线性弹性模型的准确性进行了比较。研究结果为聚氨酯灌浆技术的应用和发展提供了科学依据。