Desde 2008, eu e os meus colegas da Sinergeo, filmamos dezenas de furos de água. Este considerável número de filmagens permitiu-nos criar um arquivo video de anomalias que ocorrem com maior frequência.
Frequentemente, as captações filmadas são captações de água subterrânea do tipo furo com um diâmetro de revestimento que varia entre os 120 mm e os 140 mm cuja profundidade varia dos 60 aos 300 metros..
De todas as anomalias que podem ocorrem em furos de água gostaria de destacar as 3 mais frequentes:
1 – Tubo de revestimento de PVC partido:
Fracturas do tipo helicoidal podem ocorrer quando, aliado à ausência de verticalidade do furo, a pressão efectuada para colocar o tubo de revestimento for demasiado elevada.
Fracturas helicoidais
2- Ausência de tubo de revestimento
Com alguma frequência se encontram furos sem revestimento, e consequentemente, o maciço rochoso encontra-se exposto.
Câmera frontal
Câmera lateral
3 – Presença de objectos no interior do furo:
Durante a execução do furo de água mas também após a sua conclusão, podem alojar-se no interior objectos que poderão gerar complicações no momento de instalar a electrobomba submersível.
Tubo em PVC e bola (aparentemente) de ténis
Ferramenta presa no interior da captação
Para os mais interessados partilho ainda o video de uma inspecção efectuada a um furo de água.
Geólogo e sócio-gerente da Sinergeo
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