Abstract

Non-destructive testing (NDT) techniques play an important role in the characterization and diagnosis of historic buildings, keeping in mind their conservation and possible rehabilitation. This paper presents a new approach that merges building information modeling (BIM) with environment geospatial data obtained by several non-destructive techniques, namely terrestrial laser scanning, ground-penetrating radar, infrared thermography, and the automatic classification of pathologies based on RGB (red, green, blue) imaging acquired with an unmanned aircraft system (UAS). This approach was applied to the inspection of the Monastery of Batalha in Leiria, Portugal, a UNESCO World Heritage Site. To assess the capabilities of each technique, different parts of the monastery were examined, namely (i) part of its west façade, including a few protruding buttresses, and (ii) the masonry vaults of the Church (nave, right-hand aisle, and transept) and the Founder’s Chapel. After describing the employed techniques, a discussion of the optimization, treatment and integration of the acquired data through the BIM approach is presented. This work intends to contribute to the application of BIM in the field of cultural heritage, aiming at its future use in different activities such as facility management, support in the restoration and rehabilitation process, and research.

Highlights

  • Built cultural heritage is delicate and, once lost, it is unrecoverable

  • This work presents the results of a multidisciplinary survey for the inspection and characterization of some parts of the main wall façade of the Monastery da Batalha, a UNESCO World Heritage Site, using several non-destructive technologies: unmanned aircraft system (UAS), terrestrial laser scanning (TLS), ground-penetrating radar (GPR) and Infrared Thermographic (IRT)

  • All the results produced were eventually integrated into a unique building information modeling (BIM) model, providing a useful basis to permit their integrated analysis and interpretation

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Summary

Introduction

Built cultural heritage is delicate and, once lost, it is unrecoverable. It consists of architectural structures and other constructions that constitute the basic record of past human activities and, as such, should be protected [1]. Ground-penetrating radar (GPR) is a fast data acquisition technique that has been commonly employed for high-resolution imaging in many archaeological and cultural heritage applications [25] In this framework, GPR has proved its aptitude to map moisture and/or cracks, to detect internal deficiencies or constituents such as cavities and/or reinforcement, to identify different building materials and to determine their depth and/or thickness [26,27,28,29,30,31,32]. All these vaults are covered by fill materials and limestone tiles (or plates)

Materials and Methods
Background removal
Interpretation of the Produced GPR Images
Findings
Conclusions

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