Abstract

This paper deals with the application of the Ground Penetrating Radar (GPR) method in the assessment of stone monuments. Compilation of published works and a discussion of their main findings are first addressed. Next, to show the potential of the method, a case study is presented aiming to assess the state of conservation of the rock necropolis of San Vítor de Barxacova (Ourense, Spain) consisting of 56 anthropomorphic graves carved into the natural rock. Fieldwork was carried out using a GPR system equipped with a 2.3 GHz central frequency antenna. The main goal of this study is to provide an effective approach for the detection and localization of internal damages such as fractures and voids. New amplitude-based 2D and 3D imaging strategies are presented aiming to improve damage detection. A new approach was also developed to digitize the extracted information into a point cloud format, thus improving the possibilities for 3D visualization with the surrounding environment. Although a total of 39 graves were surveyed, only 13 graves are included in this paper due to their singularity and relevant results. The potential of using GPR tests for the assessment of the conservation state of monumental stone structures is also discussed.

Article Highlights

• A case study is presented aiming to assess the state of conservation of a rock necropolis (cemetery) in Spain

• New amplitude-based imaging strategies allowed us to detect inner voids and fractures

• A new approach was developed to digitize the extracted information into a point cloud format

中文翻译：

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探地雷达应用于纪念性石头保护：应用于西班牙西北部 San Vítor de Barxacova 的岩石墓地

摘要

本文介绍了探地雷达（GPR）方法在石碑评估中的应用。首先讨论了已发表作品的汇编和对其主要发现的讨论。接下来，为了展示该方法的潜力，提出了一个案例研究，旨在评估 San Vítor de Barxacova（西班牙奥伦塞）的岩石墓地的保护状况，该墓地由雕刻在天然岩石中的 56 个拟人坟墓组成。使用配备 2.3 GHz 中心频率天线的 GPR 系统进行实地考察。本研究的主要目的是为检测和定位裂缝和空隙等内部损伤提供一种有效的方法。提出了新的基于振幅的 2D 和 3D 成像策略，旨在改进损伤检测。还开发了一种新方法，将提取的信息数字化为点云格式，从而提高与周围环境进行 3D 可视化的可能性。虽然总共调查了 39 座坟墓，但由于其奇异性和相关结果，本文仅包括 13 座坟墓。还讨论了使用 GPR 测试评估纪念性石头结构的保护状态的潜力。

文章重点

• 介绍了一个案例研究，旨在评估西班牙岩石墓地（墓地）的保护状况

• 新的基于振幅的成像策略使我们能够检测内部空隙和裂缝

• 开发了一种将提取的信息数字化为点云格式的新方法