基于微波测振技术的高铁道岔连续梁形变监测研究
Research on continuous beam deformation monitoring of high-speed rail turnout based on microwave vibration measurement technology
大跨度桥梁及大型工程结构中存在的大量形变及振动测量,往往需要物理接触结构,导致安装复杂,且覆盖范围有限,难以满足大规模结构的全面监测需求。本文提出了一种基于微波测振技术的测量系统对高速铁路连续梁进行精确形变与振动监测方法。通过在南沿江城际铁路无砟轨道预应力混凝土道岔连续梁搭建基于微波测振技术的测量系统,分析道岔连续梁静动态挠度变化,对各测点采集的数据进行三维重构。结果表明:多个测点的微形变数据,可以连续反馈道岔连续梁形变的变化规律,能够为高速铁路建设过程不同阶段提供清晰的数据变化佐证。
A large number of deformation and vibration measurements existing in large-span Bridges and large engineering structures often require physical contact structures, resulting in complex installation and limited coverage to meet the comprehensive monitoring requirements of large-scale structures. This paper presents a measurement system based on microwave vibration measurement to the continuous beam of high speed railway. By constructing the measurement system based on microwave vibration measurement technology in the continuous beam of ballastless concrete turnout along the south Yangtze River, the static dynamic deflection change of the turnout continuous beam is analyzed, and the data collected at each measuring point is reconstructed in three dimensions. The results show that the microdeformation data of multiple measuring points can continuously feedback the change law of turnout continuous beam deformation, and can provide clear data changes for different stages of high-speed railway construction process.
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