摘要
研究目的:我国高速铁路路基跨软弱土分布广泛,且由于施工、封闭措施、微地貌排水等原因,易造成路基软化,产生沉降病害,降低高速铁路的运营效益。因此,在对路基进行注浆加固整治中,为避免造成轨道几何尺寸超限,必须构建高精度、实时在线的空间线路平顺性监测技术,为运营条件下高速铁路路基注浆加固提供技术保障。研究结论:(1)Leica TS15自动监测系统配合微型精密棱镜在对温度、湿度、气压等气象参数进行实时误差修正后,其三维精度满足全天候监测要求,可控制在±0.5 mm以内;(2)室内极限风压风洞试验和现场测试均验证了微型精密棱镜在钢轨轨腰和轨道板侧面安装的安全性与适用性,且不影响高铁列车正常运行;(3)自动监测系统能耗测试表明,结合新能源+物联网技术,可实现高铁路基注浆加固过程中自动连续监测,其精度、操作性、稳定性均能满足运营线路要求;(4)本文研究技术在运营高速铁路其他类似工况中具有参考价值。
Research purposes:In China,the subgrade of high-speed railway is widely distributed across soft soil,and due to constructions,sealing measures,micro-geomorphologic drainage and other reasons,it is easy to cause the subgrade to soften,produce settlement diseases,and reduce the operation benefits of high-speed railway.Therefore,in the courses of grouting reinforcement and renovation of the subgrade,in order to avoid the track geometry dimension exceeding the limits,it is necessary to construct a high-precision,real-time online line smoothness monitoring technology to provide technical support for grouting reinforcement of high-speed railway subgrade under operating conditions.Research conclusions:(1)The precision of the miniature precision prism and the Leica TS15 automatic monitoring system can meet the requirements of all-weather monitoring and can be controlled within±0.5 mm after the parameters such as temperature,humidity and air pressure are modified.(2)Indoor wind tunnel test and field test verify the safety and applicability of the micro precision prism installed on the rail waist and the side of the rail plate,which does not affect the normal operation of the high-speed trains.(3)The energy consumption tests of the automatic monitoring system show that the combination of portable power source and Internet of Things technology can realize automatic continuous monitoring during the grouting reinforcement process of high-speed railway subgrade,and its accuracy,operability and stability can meet the requirements of operation lines.(4)This technology in this paper has reference values in other similar operating conditions of high-speed railway.
作者
岳祖润
介少龙
YUE Zurun;JIE Shaolong(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)
出处
《铁道工程学报》
EI
北大核心
2022年第1期13-17,32,共6页
Journal of Railway Engineering Society
基金
国家自然科学基金项目(52172347)
河北省自然科学基金项目(E2020210006)
河北省教育厅在读研究生创新能力培养资助项目(CXZZBS2021117)。
关键词
高铁路基
注浆加固
线路平顺性
自动监测
high-speed railway subgrade
grouting reinforcement
line smoothness
automatic monitoring
