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近年来,苏联企业改建投资在基本建设投资中的比重不断提高。在工业厂房的改建中,常常需要在无吊车厂房中增没桥式吊车,这就必须加固现有柱子并增设吊车梁。现在常用的加设套层和加高等加固钢筋混凝土柱子的方法存在许多缺点。在现有的柱子上加设套层时,必须打开基础,浇注垫层,以便在其上施工套层。柱子
In recent years, the proportion of investment in reconstruction of Soviet enterprises in the capital construction investment has continuously increased. In the reconstruction of an industrial plant, it is often necessary to add bridge cranes in a crane-free workshop. This requires reinforcement of existing columns and the addition of crane beams. There are many shortcomings in the commonly used methods of adding jackets and reinforcing reinforced concrete columns. When adding a jacket to an existing column, the foundation must be opened and the mat be poured so that the jacket can be applied to it. pillar