【作者】 黄勇；

【导师】 马建林；

【作者基本信息】 西南交通大学 ， 建筑与土木工程， 2015， 硕士

【摘要】 虽然我国重载铁路取得了快速发展,但早期修建的重载铁路隧道已普遍开始出现各种病害,特别是隧道基底病害最为严重,严重影响了列车的正常运行。本文以大秦线军都山隧道基底病害监测为项目背景,对隧道基底病害调查、病害产生的原因、病害整治和监测方案、基床振动预警阀值做了相关研究。主要研究成果如下：(1)重载铁路隧道基底病害产生是多方面原因引起的,其中列车大轴重振动荷载和基底积水长期拍打作用是导致基底出现病害出现的最主要原因。(2)隧道基底整治方案应遵循注浆加固和基底排水结合使用的原则,排除基底积水是病害整治的关键。(3)参与开发了一套重载铁路长大隧道基底病害监测系统,该系统能克服隧道天窗时间短、隧道内环境恶劣、监测项目多、监测数据传输距离长、监测数据量庞大等不利因素。(4)长期监测数据结果表明,目前病害段基床稳定安全,基底病害得到了有效控制,在侧沟和中心沟埋设渡水管的排水效果良好。(5)采用分析监测数据和数值模拟两种方式,综合确定了隧道基床振动预警阀值,提出了两级预警机制。当竖向振动位移幅值超过8mm时,为一级预警,超过10mm时,为二级预警,各级预警状态应采取相应的处置措施,以保障列车运行安全。更多还原

【Abstract】 The heavy haul railway in china has made rapid development, but railway tunnel constructed in early has generally disease problems, especially the bedding disease is the most serious, the diseases have seriously affected the normal operation of the train. Based on the Jun Dushan tunnel of Datong Qinhuangdao line, the paper research deeply the investigation of diseases、reasons of diseases、reinforcement treatment and monitoring system and warning threshold of bedding vibration.The main research conclusions are as follows:(1) Many reasons caused the bedding disease of heavy haul railway tunnel, the vibration load of heavy haul railway and the water’s beating effect is the main reason.(2) The reinforcement must follow the principle that combining with grouting reinforcement and drainage, draining the water is the key of remediation.(3) This paper developed a system about monitoring of bedding disease, the system can overcome many disadvantage factors well, such as the less skylight time、the bad environment in tunnel、many monitoring objects、long distance of transmission and the big data.(4) The results of the long-term monitoring data show that the bedding is stable and safe now, the bedding diseases has been effectively controlled, aqueduct is very good drainage measure.(5) Based on the measured data and the numerical simulation analysis of FEM, this paper proposed two level warning system. when the vertical vibration displacement amplitude exceeds 8 mm, it is the first level warning, when the vertical vibration displacement amplitude exceeds 10 mm, it is the second level warning, different warning level should take corresponding measures to ensure the safety of train.更多还原