GPR Monitoring of Volumetric Water Content in Soils Applied to Highway Construction and Maintenance
GPR Monitoring of Volumetric Water Content in Soils Applied to Highway Construction and Maintenance
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DOI：
10.1190/1.1481259
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发表时间：
2002-05
期刊：
影响因子：
3.3
通讯作者：
K. Grote;S. Hubbard;Y. Rubin
中科院分区：
文献类型：
--
作者：
K. Grote;S. Hubbard;Y. Rubin
对地下水含量的详细了解对于公路的设计、维护和维修非常重要。交通工程师可以监测亚沥青土壤的含水率，以估计土壤硬度作为路面可能性能的指标，并评估是否需要进行地下排水改造。传统的测量含水率的方法包括重量取样法、时域反射仪(TDR)和中子探头，所有这些方法都是耗时和有侵入性的。此外，这些方法中的每一种都只提供点测量；由于土壤水分含量可能在空间和时间上变化很大，因此在大范围和一段时间内进行测量时，点测量的价值有限。这些传统方法的替代方法是探地雷达(GPR)，它可以用来快速收集连续的、高分辨率的含水率估计。由于电磁波速度的敏感性，探地雷达技术可以用来估算含水率。
Detailed knowledge of the subsurface water content is important for highway design, maintenance, and repair. Transportation engineers can monitor the water content of subasphalt soils to estimate the soil stiffness as an index of the likely performance of a pavement and to evaluate the need for subsurface drainage retrofits. Conventional approaches for measuring water content include gravimetric sampling, time-domain reflectometry (TDR), and neutron probes, all of which are time-consuming and invasive. Additionally, each of these methods provides only point measurements; because soil moisture content can vary greatly over space and time, point measurements are of limited value when surveying over a large area and over a period of time. An alternative to these conventional methods is ground-penetrating radar (GPR), which can be used to quickly collect continuous, high-resolution water content estimates. GPR techniques can be used to estimate water content due to the sensitivity of electromagnetic velocity ...