既有线路基病害车载GPR检测数据的处理方法-《高速铁路技术》

文章信息/Info

Title:: Data Processing Method of the Vehicle-mounted GPR for Detection of Railway Subgrade Diseases

Author(s):: TAO Zhiliang; XIONG Hongqiang; ZAN Yuewen; Southwest Jiaotong University, Chengdu 610031, China

Keywords:: detection of railway subgrade diseases|vehicle-mounted GPR|data processing of GPR

摘要:: 我国既有线铁路路基下沉和翻浆冒泥等病害比较普遍。为了确保行车安全，如何快速准确检测这两类常见的路基病害是亟需解决的问题。车载GPR以其快速无损和高分辨率等优势已经逐渐成为铁路既有线路基病害检测的首要选择，但该技术在数据处理方面仍需深入研究。在综合比较多种处理方法的应用效果与运行速度后，对之前处理方法进行优化改进，提出一种专门适用于既有线路基病害检测的车载探地雷达数据处理方法。经焦柳线实地挖探验证，数据解释结果与实际情况较为吻合，该处理方法能够在保持计算速度快和通用性强的前提下，显著提升车载GPR铁路路基病害检测数据的可视性，突显路基层位及病害异常相关信息，对于铁路快速无损检测有着重要意义。

Abstract:: Subgrade subsidence and mud pumping diseases are widespread in China’s existing railway. In order to ensure the safety of railway operation, how to quickly and accurately detect these two kinds of common roadbed diseases becomes an urgent problem. Vehicle-mounted GPR has become the primary choice of railway subgrade diseases detection because of its advantages of fast and nondestructive with high resolution. But this technology still needs to be further studied in data processing. After comprehensively comparing the application effect and speed of multiple processing methods, a new data processing method for vehicle mounted GPR is proposed based on the improvement of the prior processing method, which is used to detect the subgrade diseases of railway existing lines. After field excavation and verification of Jiaozuo-Liuzou line, it is proved that the processed data is in good agreement with the actual situation. This method can significantly improve the visibility of the vehicle mounted GPR railway subgrade diseases detection data on the premise of speed and versatility, highlighting the information about subgrade layers and diseases, and is of great significance to the railway rapid nondestructive detection.