Investigation of long term moisture changes in roadbeds using GPR

Proceedings of the 15th International Conference on Ground Penetrating Radar Pub Date : 2014-12-04 DOI:10.1109/ICGPR.2014.6970549

A. Kruglikov, V. Yavna, G. Lazorenko, Z. Khakiev

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引用次数: 6

Abstract

The paper is dedicated to development of a method of assessing the moisture content in a subgrade that has been exposed to occasional rainfalls and seasonal weather effects. The method is based on the obtaining and processing GPR data and allows to investigate long term moisture changes in the railway roadbeds. The change of the signal shape with time is considered depending on the attenuation of electromagnetic radiation in the medium and its reflection from the soil layers boundaries. To analyze the soil moisture content the integral reflectivity as a quantitative characteristic is proposed in this method. This variable is used to evaluate the moisture changes under rainfalls and other seasonal factors. The method verification is performed using RAW data of GPR profiling of Tuapse-Adler (Russia) railway section in December 2009 and between May and September 2010. It's shown that the value of integral reflectivity is sensitive to the soil moisture. Thus the dynamics analysis of changes in soil moisture on the selected railway sections depending on the different seasons is made. These results are in good agreement with data obtained by a track recording car.

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利用探地雷达研究路基长期水分变化

本文致力于开发一种方法来评估已暴露在偶尔降雨和季节性天气影响下的路基的水分含量。该方法基于探地雷达数据的获取和处理，可以研究铁路路基的长期水分变化。考虑了电磁辐射在介质中的衰减及其在土层边界上的反射对信号形状随时间的影响。为了分析土壤含水量，该方法提出了积分反射率作为定量特征。该变量用于评估降雨和其他季节性因素下的湿度变化。利用2009年12月和2010年5 - 9月俄罗斯Tuapse-Adler铁路段GPR剖面的原始数据对方法进行了验证。结果表明，积分反射率值对土壤湿度敏感。从而对所选铁路路段土壤水分随季节变化进行了动态分析。这些结果与轨道记录车所获得的数据吻合得很好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 15th International Conference on Ground Penetrating Radar

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