重载铁路长大隧道基底病害监测及整治方案研究

发布时间：2018-07-24 12:17

【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。
[Abstract]:Although the heavy haul railway has made rapid development in our country, the early construction of heavy haul railway tunnel has begun to appear a variety of diseases, especially the most serious disease of the tunnel base, which seriously affects the normal operation of the train. In this paper, based on the background of foundation disease monitoring in Jundushan Tunnel of Daqin Line, the investigation of the foundation disease, the cause of the disease, the scheme of disease treatment and monitoring, and the threshold value of foundation bed vibration warning are studied in this paper. The main research results are as follows: (1) the foundation disease of heavy haul railway tunnel is caused by many reasons. Among them, the vibration load of large axle load of train and the long-term slapping action of foundation water are the main reasons leading to the occurrence of foundation diseases. (2) the principle of combining grouting reinforcement with foundation drainage should be followed in the regulation scheme of tunnel foundation. Removing the water in the base is the key to the treatment of the disease. (3) A monitoring system for the basement disease of the long and heavy railway tunnel is developed. The system can overcome the short time of the tunnel skylight, the bad environment in the tunnel, the many monitoring items and the long transmission distance of the monitoring data. (4) the results of long-term monitoring data show that the base bed of the disease section is stable and safe, and the base disease has been effectively controlled. The drainage effect of the buried pipe in the side ditch and the center ditch is good. (5) by analyzing the monitoring data and numerical simulation, the early warning threshold of the foundation bed vibration of the tunnel is comprehensively determined, and the two-stage early-warning mechanism is put forward. When the amplitude of vertical vibration displacement exceeds 8mm, it is a first warning, and when it exceeds 10mm, it is a second warning. The corresponding measures should be taken to ensure the safety of train operation.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U457.2

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