Remediation Investigation of a Failing Retaining Wall Structure

This presentation is a case study combining geophysical & geotechnical investigation as well as structural deformation monitoring of a failing drystone retaining wall structure in the United Kingdom. Data collected and interpreted during this project was used to design a remediation solution, stabilizing the structure while retaining the wall's original appearance. The approach chosen in this study includes seismics, ERT and GPR studies combined with a targeted intrusive campaign to limit further destabilization of the structure. The geophysical surveys were executed close to the retaining wall, on the highroad above the wall as well as on the wall face itself. Both data sets were combined into a geotechnical interpretation which formed the basis of the remediation solution. In addition to the geophysical and geotechnical investigation a remote structural monitoring system was deployed to monitor the behaviour of the structure, ensuring the safety of the general public and infrastructure.