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一、基本情况位于山东省某地的倒虹吸工程,全长4228米,原设计铺设内径为1.2米的预应力混凝土压力管线两条。设计最大过水能力5.11米~3/秒、最大水头60米;灌溉面积达71.3万亩(其中自流5.5万亩,提水1.8万亩)。该工程于1980年春开工,第二年4月完成第一条管线的铺设任务,并于5月试运行,正常工作7昼夜后,部分地段随即覆土。同年10月再次通水运行时,连续发生5次爆管事故,虽经多次抢修,均未奏效,工程运行被迫停止。事故发生后,省、市等水利部门领导干
I. Basic situation The inverted siphon project located in a certain place in Shandong province has a total length of 4228 meters. The original design has laid two prestressed concrete pressure pipelines with an inner diameter of 1.2 meters. The maximum designed water capacity is 5.11m~3/s and the maximum water head is 60m; the irrigated area is 713,000 mu (including 55,000 mu of gravity and 18,000 mu of water). The project started in the spring of 1980 and completed the laying of the first pipeline in April of the second year. It was commissioned in May. After 7 days of normal work, some sections were immediately covered with earth. In the same year when the water was running again in October of the same year, five bursts of pipe occurred consecutively. Despite repeated repairs, they did not work and the project operation was stopped. After the accident, provincial and municipal water conservancy departments