CRTSⅡ型板式轨道砂浆充填层服役现状分析  

Analysis of Service Status of Mortar Filling Layer in CRTSⅡSlab Track

作　　者：元强[1,2] 向功坤 郑新国 张旭 王勇 YUAN Qiang;XIANG Gongkun;ZHENG Xinguo;ZHANG Xu;WANG Yong(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High-speed Railway Construction Technology,Changsha 410075,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;National Key Laboratory for Track System of High Speed Railway,Beijing 100081,China;School of Civil Engineering&Architecture,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]高速铁路建造技术国家工程研究中心,湖南长沙410075 [3]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [4]高速铁路轨道系统全国重点实验室,北京100081 [5]厦门理工学院土木工程与建筑学院,福建厦门361024

出　　处：《铁道学报》2025年第2期152-159,共8页Journal of the China Railway Society

基　　金：中国铁道科学研究院集团有限公司科研项目(2021YJ067);国家自然科学基金(51922109)。

摘　　要：CRTSⅡ型CA砂浆服役十年后的性能是否满足服役要求对轨道系统的安全运营至关重要。对邯郸东站和松江南站的CA砂浆进行力学性能、物相组成及孔隙特征等测试,研究结果表明,两地的CA砂浆干燥抗压强度无显著下降;饱水后的抗压强度下降明显,但高于《CA砂浆暂行技术条件》的要求。两地区的CA砂浆均出现了浅表层维氏硬度下降和无机相损失的损伤,且松江地区的损伤程度相对较高。松江地区CA砂浆浅表层毛细孔孔隙率明显上升;邯郸地区CA砂浆凝胶孔体积明显增大,毛细孔孔隙率仅浅表层略微增大。因此,两地的CA砂浆服役十年后仍满足规范要求,但发生了且正持续发生物理和化学损伤,需要对在役CRTSⅡ型CA砂浆定期观测和维护。The compliance of the service requirements by the performance of the cement emulsified asphalt mortar(CA mortar)in CRTSⅡslab track after ten years of service is crucial for the safe operation of the track system.In this study,tests were conducted on the mechanical properties,phase composition and pore characteristics of CA mortar in CRTSⅡtrack of Handan East Station and Songjiang South Station.The results show no significant decrease in the dry compressive strength of CA mortar in the two locations.Despite significant decrease after water saturation,the compressive strength is higher than the requirements of the Provisional Technical Conditions for CA Mortar.The CA mortar in both locations shows a decrease of shallow surface Vickers hardness and inorganic phase loss,with relatively higher damage degree in the Songjiang location.The porosity of capillary pores in the shallow surface of CA mortar in the Songjiang location increases significantly.However,the gel pore volume of CA mortar in the Handan location increases significantly,with the porosity of capillary pores increasing only slightly in the shallow layer.In summary,the CA mortar in the two locations still meets the specification requirements after ten years of service.However,physical and chemical damage has occurred or is underway,which requires regular monitoring and maintenance of CRTSⅡCA mortar in service.

关 键 词：高速铁路 无砟轨道 CA砂浆 耐久性 

分 类 号：U213.24[交通运输工程—道路与铁道工程]