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4021大桥7号墩沉井下沉时,开始由人工开挖,以后用直径250毫米和直径300毫米的空气吸泥机吸泥下沉。当沉井入土近30米时,遇到大卵石层,由于卵石太大,致使这两种吸泥机常被堵塞,吸不出卵石,沉井被卡住下不去。毛主席教导说:“你对于那个问题不能解决么?那末,你就去调查那个问题的现状和它的历史吧!你完完全全调查明白了,你对那个问题就有解决的办法了。”广大工人遵照毛主席这一教导,对施工的现状和历史作了调查研究。根
4021 Bridge Pier 7 sunk well sinking, began by artificial excavation, with a diameter of 250 mm and a diameter of 300 millimeters of suction sucker sucker. When the caisson intruded nearly 30 meters, met the pebble layer, due to the pebbles is too large, resulting in these two suction machines are often blocked, can not absorb pebbles, caisson is stuck under. Chairman Mao taught: “You can not solve that problem? Then you go to investigate the current situation of the problem and its history! You fully understand that you have a solution to the problem.” The majority of workers, in accordance with Chairman Mao’s teachings, conducted a survey on the status quo and history of construction. root