Portland Castle, Dorset: Report On Geophysical Survey, November 2012
Author(s): Neil Linford
A Ground Penetrating Radar (GPR) survey was conducted at Portland Castle, Portland Bill, Dorset, to assist with the investigation of ongoing water ingress through the external walls into the Captain’s chamber. Access for the survey was provided by a two-tier scaffold platform over the vertical face of the external wall, to assess whether the GPR technique could reveal any useful information regarding the integrity of the structure. The results confirm sufficient penetration of the radar signal to detect reflections from the internal face of the wall and identified known features, such as the timber sockets protruding into the masonry visible from the interior. A potential area of degradation within the core structure of the wall is also indicated within the upper courses of masonry, which contrasts with the response over sound elements of the building.
- Report Number:
- 40/2013
- Series:
- Research Report
- Pages:
- 6
- Keywords:
- Geophysical Survey Ground Penetrating Radar
