高速铁路全封闭声屏障基础及拱架施工误差限值研究

Study on Construction Error Limit of Foundation and Arch Frame of Fully Closed Sound Barrier in High-speed Railway

摘要:

我国高速铁路的运营里程已超过4万km，且越来越多的高铁线路在规划建设中会不可避免地穿过人群密集区。高速列车产生的噪声会对沿线居民产生较大干扰，传统的直立式声屏障的降噪效果已难以达到要求，安设全封闭声屏障作为一种更有效的降噪措施，近几年逐渐走进人们视野。然而该措施目前在高铁项目上应用较少，其整体工程的设计与施工仍存在较多问题。根据津兴铁路固永特大桥工程实例，通过数值模拟的方法，重点以全封闭声屏障的基础施工和拱架施工为研究对象，对基础和拱架这两个关键施工环节中的误差来源进行总结，对施工中的误差限值提出建议，相关研究可为后续高速铁路桥梁上全封闭声屏障的施工提供借鉴。

Abstract:

The mileage of high-speed railway operation in China has exceeded 40 000 km. The noise generated by high-speed trains will have a relatively heavy impact on the residents along the lines. However, more and more high-speed railway lines under planning and construction inevitably pass through the crowded areas. The noise reduction effect of traditional vertical sound barriers is hard to meet the requirement. As an effective noise cancellation measure, the installation of fully enclosed noise barriers has gradually come into people's view in recent years. However, this measure is rarely used in the high-speed railway construction, and there are still many challenges in the design and construction of the overall project. Based on the engineering example of Jinxing Railway Guyong Bridge, through the numerical simulation, and taking the construction of foundation and arch frame of the fully enclosed sound barrier as the study object, the sources of errors in two key construction stages of foundation and arch frame are summarized, and the suggestions for the error limits in the construction are proposed. The correlational studies can be referred for the construction of the fully enclosed sound barriers on the high-speed railway bridges in the future.