Abstract
This paper deals with the monitoring of the efficiency of polyurethane resin injection as a treatment technique in damaged residential buildings. The polyurethane resin technique is mainly adapted in repairing shallow foundations by densifying the soil and increasing the bearing capacity. The distribution path of this expansive type of material into the soil is not always known which makes it difficult to avoid further structural damage to the building. To cope with this issue, a field measurement technique was adapted for a case of a damaged residential building due to the presence of shrink-swell clays under the foundation. A geotechnical investigation survey was carried out both at laboratory and field scale before and after the treatment process. Physical properties of the soil were investigated before and after the treatment process in the laboratory and the in-situ soil dynamic resistance was investigated before and after the treatment process by the PANDA test (dynamic penetrometer test). During the treatment process, four optical fiber sensors were installed on four angles of the building in order to measure the local displacements of the walls and the cracks. Results showed that the real time monitoring of the building is an efficient technique to avoid additional damage.
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Acknowledgments
The authors would like to acknowledge DETERMINANT Group for its financial support and contribution in this industrial based R&D project. This research work wouldn’t be carried out without the help of site engineers and their precision in installing the monitoring system. Our special thanks go to the geotechnical site engineers for their participation in this project.
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Assadollahi, H., Sharma, L.K., Dinh, A.Q., Tharaud, B. (2019). Monitoring the Efficiency of Polyurethane Resin Injection for Foundation Remediation in Damaged Residential Buildings Exposed to Expansive Clays. In: McCartney, J., Hoyos, L. (eds) Recent Advancements on Expansive Soils. GeoMEast 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-01914-3_12
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DOI: https://doi.org/10.1007/978-3-030-01914-3_12
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