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五、地下及水下工程宝钢建筑中有很多深的地下构筑物,如地下油库、铁水包坑、铁皮坑和取水泵站等,有许多大断面的地下钢筋混凝土管及钢管,有的还要穿越长江大堤。工程量很大,施工困难,由于我们采取有效措施,并有不少创新,在工程的施工中创造了记录。 1.初轧一号铁皮坑内口尺寸45.3×18.3米,深22.3米,挖上深度22.5米。施工时,上部8米深采取两段坡大开挖,两级井点降水;下部12.7米打钢板桩支撑;基坑底面下4.5米用旋喷法喷
V. Underground and Underwater Engineering There are many deep underground structures in Baosteel buildings, such as underground oil depots, ladle pits, tin pits, and water pumping stations. There are many large-section underground reinforced concrete pipes and steel pipes, and some have to pass through. Yangtze River embankment. The amount of work is very large and construction is difficult. Because we have taken effective measures and have made many innovations, we have created records in the construction of the project. 1. The size of the inner surface of the pit No. 1 tin pit was 45.3×18.3m, depth was 22.3m, and the depth was 22.5m. During construction, the upper 8 meters deep to take two sections of slope excavation, two wells point precipitation; the lower 12.7 meters to play steel sheet pile support; the bottom pit under the ground 4.5 meters under the spin spray