Murphy Surveys Present at EGU General Assembly
On April 19th, Geophysicists Sónia Santos Assunção, Sophie Mann and Elodie Roussell of Murphy Surveys, presented to The EGU General Assembly. The presentation focused on Ground Penetrating Radar (GPR) through an Inspection of O’Connell Bridge, carried out by the Murphy Surveys GPR team.
Ground Penetrating Radar (GPR) is a well-known technique successfully applied in different areas. In structural inspection the methodology may expose information about structural arrangement and pathologies. GPR uses high frequency electromagnetic impulses to detect changes on electromagnetic properties meaning that different scales of structures can be analysed. The compilation of distinct frequencies gives a better understanding and a more accurate detection of elements in the inner structure.
An example of this can be seen in the case of O’Connell Bridge where a dual frequency analysis of the bridge was required due to the lack of inner structural information, especially the thickness of the layer, presence of reinforcement or other metallic elements of support.
The inspection of bridges by means of GPR may provide not exclusively interesting structural data, but also knowledge which can assist in determining historical information in terms of dating materials used.
The EGU General Assembly aims to provide a forum where scientists, especially early career researchers, can present their work and discuss their ideas with experts in all fields of Geoscience.