1985年年底,首钢代表在参加第五次全国钢管混凝土经验交流大会回到首钢后,即着手进行了用混凝土泵从管柱下直接向管内顶升浇灌混凝土的试验。他们选择了高30m、直径为700mm的通廊钢管混凝土支架进行低位顶升试验,混凝土坍落度15cm,每管仅15分钟即完成了顶升浇灌,开创了冬季施工用泵向钢管内 At the end of 1985, after attending the 5th National Steel Pipe Concrete Experience Exchange Conference and returning to Shougang, the representative of Shougang began the test of concrete pouring directly under the pipe string from under the pipe string to the top of the pipe. They chose a 30m high, 700mm diameter corridor steel-concrete-concrete support to perform a low-level jacking test. Concrete slump was 15cm. Each pipe only completed 15 minutes of jacking and pouring, creating a winter construction pump into the steel pipe.