一、垂直顶升工程的建设概况这类工程可应用于发电、钢铁、石油化工厂的大规模取水和排放系统。在中国第一次使用该种工程是金山石化总厂污水处理厂的4号排放口。一九七四年春为择定较为合理的出水口施工结构,曾就1)垂直顶升2)浮运拼装沉井3)筑岛围堰三种施工方案进行过讨论,经过反复研究、分析比较,采用了第一种方案。理由是其余两种方案虽然是传统的做法,但存在缺点很多,如设备庞大、费用浩大,施工工期不易 First, the construction of vertical jacking project Overview Such projects can be applied to power generation, iron and steel, petrochemical plants large-scale water and drainage systems. The first use of such a project in China is the No. 4 discharge at the Jinshan Petrochemical Plant Sewage Treatment Plant. In the spring of 1974, a fairly reasonable outlet construction structure was chosen and three construction schemes of 1) vertical lifting 2) floating and assembling of the caisson 3) construction of the island cofferdam were discussed, and after repeated studies, analysis and comparison , Using the first option. The reason is that although the other two schemes are the traditional methods, they have many shortcomings. For example, the equipment is huge, the cost is huge, and the construction period is not easy