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在我处施工的702大桥北岸引桥一百多个桥墩的基础中,大部分为沉井基础,深度在18.5～40m之间,井身混凝土分节灌注,每节高5～6m。为了抵消混凝土对模板的侧压力,根据计算,需设置一定数量的拉杆(对拉螺栓),以沉井深度平均为24.5m计,每个沉井需用拉杆约1.5t。遵照毛主席关于勤俭建国的教导和周总理关于节新利废的指示,我们创造了用普通胶管
Among the foundations of more than 100 bridge piers for the north bridge of the 702 bridge that is under construction at our site, most of them are caisson bases with a depth of 18.5-40m. Well-casing concrete is perforated with sections of 5-6m high. In order to counteract the lateral pressure of the concrete to the formwork, a certain number of tie rods (pairs of pull bolts) are required to be calculated according to the calculation. The average caisson depth is 24.5 meters, and each caisson needs about 1.5 tons of tie rods. In accordance with Chairman Mao’s teachings on thrifty establishment of the nation and Premier Zhou’s directives on new profits and losses, we created a new type of hose