沟槽现象

溝渠效應(Trench Effect)或稱溝槽現象,由英國國王十字車站手扶梯燃燒現象而來(国王十字站大火),火災發生原因為燃燒之火柴掉入木造手扶梯的溝槽中,火勢延著手扶梯的斜角燃燒漫延,火勢漫延之方向和煙熱之方向一致,造成可燃物預加熱,火勢漫延極快,當閃燃發生時,會朝著上方形成噴射式大火,引發嚴重人命之傷亡。

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