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1.引言由于1974年日本一家炼厂发生了漏油事故,所以地方政府对大型油罐底板的厚度做了严格的规定,要求对所有油罐底板进行定期和系统的检查.更换底板传统上是采用千斤顶顶的方法,采用这种方法需在罐上装上附件,又要对千斤顶底座下的基础进行加固定位。因此劳功强度大,需要费用高的液压千斤顶,作业时间也长.日本石油精制公司和新泻工程公司经过两年的共同试验研究,于1977年提出了一种称之为“支撑件法”的简单方法。与“千斤顶法”相比,“支撑件法”的优点是检修费用和作业时间均可减少30%。现已有260座各类油罐,其中包括十万米~3的
1. Introduction Due to an oil spill at a refinery in Japan in 1974, local authorities imposed strict rules on the thickness of large oil bottoms and required regular and systematic inspection of all tank bottoms. Traditionally, replacement of bottoms The use of jack top method, the use of this method requires the attachment of the tank, but also to strengthen the base under the jack base positioning. Therefore, labor intensity, the need for high-cost hydraulic jacks, long working hours.Japan refinery and Niigata engineering company after two years of joint experimental study, in 1977 proposed a so-called “support method” The easy way Compared with the “jack method”, “support method” has the advantage of maintenance costs and operating time can be reduced by 30%. There are now 260 all types of oil tanks, including one hundred thousand meters ~ 3