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2010年6月2日9时许,北京市昌平区南沙河北岸,3名工人下污水井疏通管道期间,因沼气中毒被困井底。由于现场无人监护未戴防护设备,经过一个半小时救援,3人被救出,其中2人抢救无效身亡。2010年8月12日上午11时,江苏华泰道路桥梁工程有限公司施工人员在维修破裂污水管道过程中,下井开启管道阀门,造成3人死亡。2010年10月16日15时20分许,广州市白云区夏茅联程物流货运场附近的河涌边,2名工人在清理下水道时,疑沼气中毒,导致1人死亡,另1人入院治疗。这几起事故都是发生在地下管道,工人下井疏通修理时发生的。污水管道为何如此危险?此类事故为何频发?中毒死亡率为何如此之高?本期事故案例带您一同思考。
At 2 pm on June 2, 2010, during the dredging of the sewage wells under the three workers in the north bank of Nansha River in Changping District of Beijing, they were trapped in the bottom due to methane poisoning. Since no guardianship at the scene was not wearing protective equipment, three people were rescued after a one-and-a-half-hour rescue and two of them were killed without any help. At 11 a.m. on August 12, 2010, construction personnel of Jiangsu Huatai Road and Bridge Engineering Co., Ltd. went down to open pipeline valves during the process of repairing the sewer pipe, resulting in 3 deaths. At 16:10 on October 16, 2010 Xu, Guangzhou City, Baiyun District, Chamaemer logistics and freight forwarding near the freight yard edge, two workers in the clean-up sewer, suspected biogas poisoning, leading to 1 death and 1 other hospitalization. These accidents have occurred in the underground pipe, workers went down to clear the repair occurred. Why is the sewer pipe so dangerous? Why are such accidents frequent? Why the mortality rate of poisoning is so high? The accident cases brought you to think together.