Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Non-invasive ground penetrating radar investigation of a failing concrete floor slab
At a New Zealand wastewater treatment plant there are several large wastewater settlement tanks that are crucial to the operation of the plant. These concrete tanks are 50 metres in diameter and 8 metres deep with the base of each tank approximately seven metres below ground level. It was discovered that the base of one of the tanks had become distorted, with the result that it could no longer carry out its function. This was a major problem for two reasons: The tank was important for maintaining sufficient throughput for the overall operation. There was a danger of contamination of the subsurface aquifers, which are the main potable water supply for the area, should a tank base failure occur. In addition to the problems outlined above, due to the type of construction of these tanks, the floor could not be cut into or disturbed to any significant extent without risking catastrophic failure. Ground penetrating radar (GPR) was used to accurately pinpoint those areas below the base of the tank where voids had formed; the subsurface voids were the root cause of the tank floor distortion. The information that was provided using ground penetrating radar enabled grouting repairs, through the floor slab, to be carried out using precisely positioned small diameter holes thus avoiding the risk of catastrophic failure of the tank base. GPR also allowed the grouting progress to be monitored until the repairs were completed.
Non-invasive ground penetrating radar investigation of a failing concrete floor slab
At a New Zealand wastewater treatment plant there are several large wastewater settlement tanks that are crucial to the operation of the plant. These concrete tanks are 50 metres in diameter and 8 metres deep with the base of each tank approximately seven metres below ground level. It was discovered that the base of one of the tanks had become distorted, with the result that it could no longer carry out its function. This was a major problem for two reasons: The tank was important for maintaining sufficient throughput for the overall operation. There was a danger of contamination of the subsurface aquifers, which are the main potable water supply for the area, should a tank base failure occur. In addition to the problems outlined above, due to the type of construction of these tanks, the floor could not be cut into or disturbed to any significant extent without risking catastrophic failure. Ground penetrating radar (GPR) was used to accurately pinpoint those areas below the base of the tank where voids had formed; the subsurface voids were the root cause of the tank floor distortion. The information that was provided using ground penetrating radar enabled grouting repairs, through the floor slab, to be carried out using precisely positioned small diameter holes thus avoiding the risk of catastrophic failure of the tank base. GPR also allowed the grouting progress to be monitored until the repairs were completed.
Non-invasive ground penetrating radar investigation of a failing concrete floor slab
Eingriffsfreie Untersuchung einer fehlerhaften Betonbodenplatte mit Bodenradar
King, M.L. (Autor:in) / Wu, D.P. (Autor:in) / Nobes, D.C. (Autor:in)
2003
5 Seiten, 5 Bilder, 6 Quellen
(Nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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