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随着预应力混凝土技术的发展,预应力钢筋混凝土构件的应用和生产日益增加。在各类不同的预制方法中,采用长线台座工艺已十分普遍。目前我国使用的露天长线台座有两种,一种是传统的普通素混凝土台座,另一种是预应力钢筋混凝土台座。这两种台座,我厂均曾应用。但是台座经长期使用后,由于自然界温差影响、基础沉降不均、设计与施工不良等因素,则使台面局部沉降
With the development of prestressed concrete technology, the application and production of prestressed reinforced concrete components are increasing. Among the various prefabricated methods, the use of long-line pedestal technology has become widespread. At present, there are two types of open-air benches used in China, one is a traditional plain concrete pedestal, and the other is a prestressed reinforced concrete pedestal. Both of these pedestals have been used in our factory. However, after the pedestals are used for a long period of time, due to factors such as natural temperature differences, uneven foundation settlement, poor design and construction, etc.