Evaluation of ancient structures by GPR: The arch bridges of Galicia (Spain)

摘要

Historical bridges are an integral part of the traditional architectonic heritage of a region. These ancient structures require special attention because many of them have lost their original utility and now perform different functions, which often require supporting special tension conditions. Therefore, constant diagnosis of their structure is necessary using methods that will not change the historical character of the structure. In this work,a survey methodology is proposed to analyse the viability and effectiveness of ground penetrating radar (GPR) for obtaining internal information on ancient masonry arch bridges from three points of view: historical, structural and archaeological. Several Roman or medieval bridges in the Galician territory (northwest Spain) were surveyed with GPR. An inventory was developed that includes the most relevant information obtained for their structural analysis and characterisation and to develop synergies for creating or improving the processes and services related to the evaluation, rehabilitation and maintenance of ancient structures.